Art
[1]This application is all the information and claims the benefit of priority based on 2017.08.10 character Korea Patent Application No. 10-2017-0101505, described in the literature of the Korea patent application is included as part of this specification.
[2]The present invention relates to a former lithiated method of the secondary battery anode, particularly in the previous step to assemble a lithium secondary battery, and immersing a cathode in the electrolyte wetting (wetting) while in direct contact with the lithium metal anode was after standard by the lithiated before applying a pressure and during stabilization (aging) time after the disconnect the lithium metal to the negative electrode also relates to a method of the negative electrode lithiated before that by pressing at a high pressure.
BACKGROUND
[3]The price of energy due to the depletion of fossil fuels is rising, while the amplified interest in environmental pollution becomes an indispensable factor for the demand for eco-friendly alternative energy sources, the future life and, in particular, technology development for mobile devices the demand for secondary batteries as an energy source is rapidly increasing as the demand increases.
[4]
[5]Typically in the form face of the battery in the high and the demand for prismatic secondary batteries or pouch type secondary batteries with a thin thickness can be applied to products such as a mobile phone, the material surface at high energy density, discharge voltage, the lithium ion battery of the output stability, the demand is high for a lithium secondary battery such as a lithium ion polymer battery.
[6]
[7]
In general, secondary batteries are home coating the entire active materials to the surface of the configuration on the positive and negative electrodes, and then by interposing the separator therebetween made of an electrode assembly, a cylindrical or prismatic metal can, or inside the pouch-shaped case of the aluminum laminate sheet of attached, either primarily or impregnated with a liquid electrolyte injected into the electrode assembly, or is manufactured using a solid electrolyte.
[8]
[9]
The cathode of the lithium secondary battery is generally used, but a carbon material such as graphite, a theoretical capacity density of carbon is 372mAh / g (833mAh / ㎤). Therefore, a lithium alloy and a silicon (Si), tin (Sn), or oxides thereof and alloy or the like is examined in a negative electrode material in order to improve the energy density of the negative electrode. Among them, silicone materials have received attention due to low prices and high capacity (4200mAh / g).
[10]
[11]
However, the silicone is a volume change in the intercalation / deintercalation process of lithium ions (shrinkage or expansion) is generated poor mechanical stability, and as a result, a problem that the cycle characteristics inhibition. Thus, by having the structural stability it is excellent in stability when used as the active material of the electrochemical device, and it is necessary to develop a material which can secure the cycle characteristics.
[12]
[13]
In addition, when using a silicon-based negative active material has a large initial irreversible capacity problem. In the charging and discharging reaction of the lithium secondary battery, and has a lithium insertion in the cathode discharge from the anode during charging and discharging when there are desorbed from the negative electrode dolahganeunde back to the anode, in the case of a silicon-based negative active severe a change in volume and the surface side reactions during the initial charge a large amount of lithium inserted into the negative electrode not to go back to the positive electrode, and thus there arises a problem of enlarging the initial irreversible capacity. The larger the initial irreversible capacity, there arises a problem that the battery capacity decreases rapidly with cycle.
[14]
[15]
The method for pre lithiated cathode comprises a silicon-based negative active material in order to solve the problem as described above is known. I lithiated method, and a method for pre lithiated a method for producing the electrode and the negative electrode was lithium by a physicochemical method for the negative electrode active material Chemistry electrochemically known.
[16]
However, before the lithium ion after lithiated this as it travels through the diffusion in the negative electrode may be a volume change, a volume change of this is it is possible to reduce the capacity and the cycle of the cell, to minimize the volume change after the former lithiated there is a need in the technology.
[17]
Detailed Description of the Invention
SUMMARY
[18]
An object of the present invention is to provide a former lithiated method and a secondary battery electrode and a secondary battery prepared by the above method to minimize the volume change after the electrodes passed through the former lithiated to solve the problems of the prior art .
[19]
Problem solving means
[20]
The present invention is a first step of applying a pressure around the lithiated sikimyeo direct contact with the lithium metal in the electrode in an electrolytic solution; And a second step After removing the lithium metal, applying a pressure to the full-lithiated electrode performing a stabilization process; The former method of lithiated secondary cell electrode comprising a.
[21]
According to an appropriate embodiment of the invention, at least one of the step of the first step or second step, it is possible to apply pressure to raise the lithium metal electrode in the fastening jig.
[22]
According to an appropriate embodiment of the present invention, the electrode is a cathode.
[23]
According to an appropriate embodiment of the present invention, the electrode may comprise silicon oxide.
[24]
According to an appropriate embodiment of the invention, the pressure applied in the first step and the second step is 20 to 50 kgf.
[25]
According to an appropriate embodiment of the invention, the first step may be to apply pressure to the electrode, and lithium metal for 0.1 to 10 hours.
[26]
According to an appropriate embodiment of the invention, the second step may be pressure bonded to the electrodes for 0.5 to 10 hours.
[27]
According to an appropriate embodiment of the present invention, by immersing the electrode prior to the first step of the electrolytic solution it may further comprise a step of wetting (wetting).
[28]
According to an appropriate embodiment of the invention, the time for immersing in the electrolyte wetting in the previous step may be 1 to 48 hours.
[29]
According to an appropriate embodiment of the invention, the second step may be performed in an electrolytic solution.
[30]
In addition, the present invention includes the steps of preparing a slurry (slurry) electrode active material, conductive material, and a binder, mixing (mixing); The method comprising a slurry (slurry) wherein the mixing (mixing) on ​​the entire current collector coated (coating); The step of pressing the entire current collector, the coating (coating) with a roller and punching, dried over unit electrodes; Provides a method of manufacturing a secondary cell electrode comprising the electrode and a secondary battery produced by the above production method; and before the step of lithiated according to the former method according lithiated the dried electrode unit according to claim 1.
[31]
Effects of the Invention
[32]
Secondary batteries subjected to pre lithiated step of providing electrodes in the present invention has the effect of alleviating a change in volume of the electrode to reduce the contact loss (Loss Contact) of the electrodes accordingly.
[33]
The electrode produced by applying the former lithiated method of the present invention has the effect of this loss of contact electrodes which are the cycle performance improves with reduced.
[34]
The secondary battery of the present invention because the application of this cycle performance is improved electrode capacity maintenance rate excellent effects.
[35]
Brief Description of the Drawings
[36]
1 is a schematic diagram showing a prior lithiated step according to the present invention (the first step) and the stabilization step (step 2).
[37]
Best Mode for Carrying Out the Invention
[38]
Hereinafter, the present invention in detail. The present invention is not limited by the following Examples and Experimental Examples. Examples according to the present invention can be modified in many different forms and the scope of the invention is not to be construed as limited to the embodiments set forth herein. Embodiments of the present invention are provided to more fully illustrate the present invention the technician skilled in the art.
[39]
[40]
I lithiated the secondary cell electrode according to the present invention, a first step of applying a pressure around the lithiated sikimyeo direct contact with the lithium metal in the electrode in an electrolytic solution; And a second step of performing After removing the lithium metal, the stabilization process by applying pressure to the full-lithiated electrode, subjected to.
[41]
1, the first step of the former lithiated of the invention is pressured sikimyeo direct contact with the lithium metal in the electrode in an electrolytic solution. By applying a certain force in the top and bottom place of lithium metal on the electrode contacting the electrode and the lithium metal is conducted directly to upset before lithium. Similarly lithium and initial irreversible situations by direct contact between the electrode and the lithium metal to enter between the electrode and the catch seat, so that the irreversible is less likely to occur in the subsequent filling by the space it is possible to control the initial irreversible degree of the electrode.
[42]
Electrolyte to carry out the whole process of the present invention to provide a lithiated lithium salt is dissolved in the solvent as long as it forms a kind of electrodes promote a side reaction will be experienced when the initial charge is not limited. As the lithium salt, LiCl, LiBr, LiI, LiClO 4 , LiBF 4 , LiB 10 Cl 10 , LiPF 6 , LiCF 3 SO 3 , LiCF 3 CO 2 , LiAsF 6 , LiSbF 6 , LiAlCl 4 , CH 3 SO 3 Li, CF 3 SO 3 Li, (CF 3 SO 2 ) 2NLi, chloroborane lithium, lower aliphatic carboxylic acid lithium, 4-phenyl boric acid can be more than one or two selected from the group consisting of lithium, the solvent is N- methyl-2-pyrrolidinone, propylene carbonate, ethylene carbonate, butyl butylene carbonate, dimethyl carbonate, diethyl carbonate, ethyl methyl carbonate, gamma-butyl lactone may be any one or a mixture of two or more selected from the group consisting of 1,2-dimethoxyethane.
[43]
Of lithium metal in the first step is preferably a size that can cover the entire electrode, a method of applying a force to the lithium metal is not limited. Raise the lithium metal to the electrode can be entered into a jig to apply pressure toward the center in the top and bottom of the electrode and the lithium metal contact. Can also by using a press machine to apply pressure to the contact surface of the electrode and the lithium metal.
[44]
Pressure applied to the former lithiated at the first stage is 20 to 50 kgf, preferably from 25 to 45kgf, most preferably from 30 to 40kgf. If 20kgf less is not desirable to do good contact between can not not inhibit the entire lithium upset enough initial irreversible significantly occurs, and volume expansion around the lithiated course not happen active material, if it exceeds 50kgf In the former lithium upset transient proceeds may be a problem to reduce the electrode capacitance, and since the excessive pressure applied to the electrodes may cause problems of damaging the active material.
[45]
Further, when lithiated before the first step, the time for applying pressure to the electrode, and lithium metal is from 0.1 to 10 hours, more preferably from 0.3 to 5 hours, and most preferably from 0.5 to 3 hours.
[46]
[47]
In the present invention, the electrode prior to performing the I lithiated at the first stage was immersed in the electrolytic solution may be wetting (wetting). The volume of the electrode by the wetting is to be inflated to a certain level and penetrates deep into between the electrolytic solution between the particles and the distance between the between the electrode active material particles suitably increased. Therefore, it is possible to lithium ions are better penetration into the electrode by the electrolyte solution and in direct contact increases the contact area of ​​the electrode.
[48]
The wetting is 1 hour to 48 hours and preferably for 3 hours is more preferably to 30 hours, and most preferably from 5 to 20 hours decided. 1 may be the negative electrode does not occur sufficiently before lithium by direct contact in a later stage can not not not sufficiently swell the electrolyte to penetrate deep enough cathode upset if the wetting to the time less than, the electrodes with electrolyte if the wetting for more than 48 hours is too long to be exposed is impaired, the form stability of the fall electrode adhesion is not preferred because the cell balance is reduced.
[49]
[50]
A second step of the present invention is to stabilize the cathode Remove the lithium metal was taken up on the electrode, by applying pressure around the lithiated cathode. Even electrode before completing the lithium-lowering process, lithium ions may be a change in volume of the electrode as it travels through the diffusion in the electrode, a volume change of this is increases the irreversible capacity of the electrode, in the present invention, the volume change of the electrode to perform a stabilization process for applying a pressure to the electrode in order to mitigate more.
[51]
Pressure applied to the stabilization step when the electrode is 20 to 50 kgf, preferably from 25 to 45kgf, most preferably from 30 to 40kgf. If the case is less than 20kgf undesirable in the initial irreversible largely generated do not occur sufficiently before lithium upset exceeds 50kgf, there may be a problem that the electrode capacity decreases as it proceeds around the lithium upset transient. How to apply pressure around the lithiated electrode can of a method of using a pressing machine, or entered into a lithiated electrode before the jig.
[52]
The stabilizing step can be performed in an electrolytic solution.
[53]
In addition, the time for applying pressure to the stabilization step when the electrode is supposed to have 0.5 to 10 hours, more preferably from 1 hour to 8 hours, most preferably from 2 hours to 6 hours decided. It is because if the time of applying pressure of less than 0.5 hour stabilization is difficult to achieve the object of the present invention, a case exceed 10 hours poor shape stability of the electrode problem.
[54]
I lithiated method of the present invention can be applied to the secondary battery negative electrode. In particular, it is preferable to apply the former lithiated method of the present invention in the negative electrode was used as a main material silicon and oxides thereof in order to increase the capacity density of the negative electrode using a carbon material such as conventional graphite.
[55]
Silicon oxide is much because of the theoretical capacity density of the high 4200mAh / g, but can be suitably used as a secondary battery negative electrode, away from the dimensionally stable large initial irreversible capacity, reducing the electrode capacity than the theoretical capacity density of carbon material 372mAh / g There is a risk of collapse or balancing cells require pre lithiated process as in the present invention.
[56]
[57]
The present invention is characterized in that to provide a lithiated before preparation of the electrode comprises the step of in the same manner as described above. Manufacturing method of the electrode of the present invention includes the steps of preparing a slurry (slurry) electrode active material, conductive material, and a binder, mixing (mixing); The method comprising a slurry (slurry) wherein the mixing (mixing) on ​​the entire current collector coated (coating); The step of pressing the entire current collector, the coating (coating) with a roller and punching, dried over unit electrodes; And further comprising: before lithiated according to the former method the lithiated the dried electrode unit; comprises a.
[58]
[59]
I except for the lithiated method comprising the same and method for producing a conventional secondary battery, the negative electrode before lithiated can be easily added to the step of, further processing is also not large also increases the cost because the easy and simple advantages itself to the existing process there is. In addition, existing physicochemical method is the practice at a high temperature had a risk of fire and explosion, the electrochemical method is relatively safe but the disadvantage that the homogenization is greatly increased cost is difficult, before lithiated process according to the invention is not greater increases cost and uniformly, and the previous lithium mad possible benefits, the former by stabilizing the lithiated electrode minimizes the volume change of an electrode, the effect of reducing initial irreversible capacity than the electrode by a conventional direct-contact pre lithiated method and urine volume maintenance rate this has been further improved.
[60]
[61]
On the other hand, the present invention has the characteristic that even in providing a secondary battery including the negative electrode produced in the same manner as described above.
[62]
[63]
A secondary battery according to the present invention is composed by two separate electrodes of different polarities are stacked in a separate state to the separator housing a formed electrode assembly, the electrode assembly is a cathode including a positive electrode, a negative electrode active material comprising a positive electrode active material , and it is composed of a separator.
[64]
[65]
Specifically, the positive electrode is, for example, be prepared by drying after applying the mixture of the positive electrode active material, conductive material and a binder on a positive electrode collector, as necessary, a filler may be further added to the mixture.
[66]
[67]
The positive electrode active material according to the present invention lithium cobalt oxide (LiCoO 2 ), lithium nickel oxide (LiNiO 2 ) the compound substituted by a layered compound or one or more transition metals, and the like; Formula Li 1 + x Mn 2-x O 4 (where, x is from 0 to 0.33), LiMnO 3 , LiMn 2 O 3 , LiMnO 2, lithium manganese oxide (LiMnO of 2 ); Lithium copper oxide (Li 2 CuO 2 ); LiV 3 O 8 , LiFe 3 O 4 , V 2 O 5 , Cu 2 V 2 O 7 of vanadium oxide and the like; Formula LiNi 1-x M x O 2 (where, M = Co, Mn, Al , Cu, Fe, Mg, B or Ga, and, x = 0.01 ~ 0.3 Im) Ni-site type lithium nickel oxide (lithiated nickel expressed in oxide); Formula LiMn 2-x M x O 2 (where, M = Co, Ni, Fe , Cr, and Zn, or Ta, x = 0.01 ~ 0.1 Im) or Li 2 Mn 3 MO 8 (where, M = Fe, Co, Ni, lithium manganese composite oxides represented by Cu or Zn); A lithium portion of the formula is substituted with alkaline earth metal ions LiMn 2 O 4 ; Disulfide compounds; Fe 2 (MoO 4 ) 3 Or it may be mixed with the compound containing as a main component a lithium adsorbent material (lithiumintercalation material), such as composite oxides formed by combination thereof.
[68]
[69]
The cathode current collector is generally fabricated to have a thickness of 3 to 500 ㎛. The cathode current collector, if it has suitable conductivity without causing chemical changes in the fabricated battery is not particularly limited, for example, the surface of stainless steel, aluminum, nickel, titanium, sintered carbon, or aluminum or stainless steel on carbon, nickel, titanium and the like may be used as a surface treatment or the like. Current collector may increase the adhesive strength of the positive electrode active material to form fine irregularities on the surface thereof, films, sheets, foils, nets, porous structures, foams and non-woven fabrics and so on can take various forms.
[70]
[71]
The conductive material is commonly added in the mixture including the cathode active material to the total weight of 1 to 50% by weight. This conductive material so long as it has suitable conductivity without causing chemical changes in the fabricated battery is not particularly limited, for example, graphite such as natural graphite or artificial graphite; Carbon black, acetylene black, Ketjen black, channel black, furnace black, lamp black, carbon black and thermal black; Conductive fibers such as carbon fibers and metallic fibers; Metal such as carbon fluoride, aluminum, nickel powder, powder; Conductive whiskers such as zinc oxide and potassium titanate; Conductive oxides such as titanium oxide; Poly is a conductive material such as phenylene derivative may be used.
[72]
[73]
The binder is a component assisting in binding to the total binding and the home, such as the active material and the conductive material is commonly added in the total mixture weight, includes the cathode active material of 1 to 50% by weight. Examples of the binder include polyvinylidene fluoride, polyvinyl alcohol, carboxymethylcellulose by Woods (CMC), starch, hydroxypropylcellulose, regenerated cellulose, polyvinyl pyrrolidone, ethylene, polyethylene tetrafluoroethylene , polypropylene, ethylene-propylene-diene terpolymer (EPDM), sulfonated EPDM, styrene beuti butylene rubber, fluoro rubber and various copolymers and the like.
[74]
[75]
The filler is selectively used as a component of suppressing the expansion of the positive electrode, if the standing fibrous materials without causing chemical changes in the fabricated battery is not particularly limited, for example, up pingye polymers such as polyethylene and polypropylene; And fibrous materials such as glass fiber and carbon fiber.
[76]
[77]
Further, the cathode is fabricated by applying and drying a negative electrode material on a negative electrode current collector and, if necessary, may be further included to the same components described above.
[78]
[79]
The anode current collector is generally fabricated to have a thickness of 3 to 500 ㎛. The anode current collector, so long as it has suitable conductivity without causing chemical changes in the fabricated battery is not particularly limited, for example, of copper, stainless steel, aluminum, nickel, titanium, sintered carbon, copper or stainless steel surface to be surface-treated with carbon, nickel, titanium or silver, and aluminum-cadmium alloys. Also Similar to the cathode current collector, to form fine irregularities on the surface may enhance the bonding strength between the negative electrode active material, films, sheets, foils, nets, porous structures, foams and non-woven fabrics or the like can be used in various forms.
[80]
Negative electrode active material of the present invention, it is possible to use a material which reversibly inserts / release lithium ions such as silicon (Si) or tin. With this material, it is that of the composite anode active material including the organization, an alloy, a compound, a solid solution and a silicon-containing material or a tin-containing material which would also exert the effects of the present invention are possible. A silicon containing material, Si, SiO x (0.5
[101]
As the negative electrode active material (graphite: SiO = 7: 3) 92% by weight of Denka black (Denka Black, a conductive material), 3 wt%, SBR (binder) 3.5% by weight of CMC (thickener) cathode by the addition of 1.5% by weight in water the mixture slurry was prepared.
[102]
On a surface of a copper collector, and coating the negative electrode mixture slurry, which was dried and rolled to prepare a negative electrode was punched into a predetermined size.
[103]
[104]

[105]
A negative electrode prepared in the above 10 hours electrolyte (ethylene carbonate (EC), ethylmethyl carbonate (DEC) the volume ratio of the solvent, 1M lithium phosphate hexafluoride (LiPF the mixture to a 50: 50 as shown in Fig 6 the electrolyte solution) is dissolved ) it gave after wetting by the, by oligonucleotide on the anode of lithium metal in the state in which the electrolyte entered the pressing jig to give a force of 30kgf. After this given by the lithiated before for 30 minutes to give off lithium metal.
[106]
[107]

[108]
As the first to enter into one before the lithiated cathode produced in the back in the jig was pressed for 2 hours, a force of 30kgf gives push forward the stabilization process.
[109]
[110]

[111]
A negative electrode and LiCoO prepared in the above step 2 was interposed between the polyolefin separator as the counter electrode, the solvent is ethylene Ke mixed carbonate (EC), ethylmethyl carbonate (DEC) in a volume ratio of 50:50 1M LiPF 6 with a soluble electrolyte It was injected to prepare a coin-pull cells.
[112]
[113]
Example 2
[114]
Except that changing the pressure applied around the lithiated and stabilization to 20kgf to prepare a secondary battery in the same conditions as in Example 1.
[115]
[116]
Example 3
[117]
Except that pressure bonded to the electrodes for three hours in a high pressure stabilization step to prepare a secondary battery in the same conditions as in Example 1.
[118]
[119]
Example 4
[120]
Was prepared in a secondary battery in the same conditions as in Example 1 except that the high-pressure direct contact before pressing the lithiated cathode and lithium metal for an hour at this stage.
[121]
[122]
Example 5
[123]
It was prepared in a secondary battery in the same conditions as in Example 1 except that the wetting time of the electrode at high pressure directly to the pre-contact lithiated step was changed to 15 hours.
[124]
[125]
Comparative Examples 1 to 4
[126]
The former lithiated when compressive forces, wetting time, settling when pressing force of the electrode, except that the substrate was changed as shown in Table 1 was prepared in the secondary battery in the same conditions as in Example 1.
[127]
[128]
1. The thickness of the measurement electrode
[129]
Whether by the meter through the negative electrode prepared in the above step height measuring thickness much increased compared to the initial thickness. The results are shown in Table 1.
[130]
[131]
2. The capacity retention measures
[132]
A coin-shaped pull cell was prepared in using an electrochemical charge-discharger to the reversible charge and discharge capacity retention rate of the test are shown in Table 1. To the voltage of the charging 4.2V (vs.Li/Li+) gave Charge added to the current at a current density of 0.1C-rate, the discharge was carried out up to a voltage of 2.5V at a current density such as during discharge.
[133]
[134]
TABLE 1
Wetting time (hours) of the electrode I lithiated during pressing force (kgf) I lithiated time (hours) Stabilized when pressing force (kgf) Stabilization time (hrs) I hwahu lithium electrode thickness increase (%) 100cycle capacity retention rate (%)
Example 1 10 30 0.5 30 2 31 88
Example 2 10 20 0.5 20 2 33 86
Example 3 10 30 0.5 30 3 29 90
Example 4 10 30 1 30 2 37 85
Example 5 15 30 0.5 30 2 32 88
Comparative Example 1 10 30 0.5 0 2 43 77
Comparative Example 2 10 1 0.5 0 2 51 68
Comparative Example 3 10 1 0.5 30 2 47 75
Comparative Example 4 0 30 0.5 30 2 39 73

[135]
[136]
I lithiated and was smaller than the thickness change before and after the comparative example lithiated the embodiment haejun strong compression during stabilization. The created capacity retention rate of the pull cell has a cathode made uniformly and to a cycle test of 100 cycles was also measured higher than the comparative example.
[137]
Is generally an expansion around the lithiated and lithium ions are stabilized when the volume of the active material, depending on the incoming cathode drops and the contact between particles which is tteurige off the electrical contact. However, the former lithiated and when stabilized during exerts a strong pressure because the contact loss between the resulting particles with a volume change does not significantly reduce the cycle test to produce a battery with the same electrode as in the embodiment of the present invention, the capacity retention ratio becomes higher It can be found.
[138]
[139]
In the above, the present invention has been been described by the specific examples and experimental examples, the present invention is not limited by this and the teachings of the present invention by one of ordinary skill in the art various modifications and variations within the equivalent scope of the claims to be described below are possible as a matter of course.
[140]
Reference Numerals
[141]
10: Electrolyte
[142]
20: fixture (jig)
[143]
30: Lithium metal (lithium metal)
[144]
40: electrode
[145]
50: the former lithiated electrode

Claims
[Claim 1]
Sikimyeo direct contact with the lithium metal in the electrode in an electrolytic solution comprising: a first step of pre lithiated by applying pressure; And a second step After removing the lithium metal, applying a pressure to the full-lithiated electrode performing a stabilization process; I lithiated the secondary cell electrode comprises a.
[Claim 2]
In the first step before lithiated the secondary cell electrode characterized in that raising the lithium metal to the electrode for applying the pressure by entering into the jig of claim 1.
[Claim 3]
The method of claim 1 wherein the second stage is around the entire lithiated method of the secondary battery electrode of the lithiated electrode characterized in that applying pressure to the fastening jig.
[Claim 4]
The method of claim 1, wherein the electrode is around lithiated method of secondary cell electrode, characterized in that the negative electrode.
[Claim 5]
The method of claim 1, wherein the electrode is around lithiated method of secondary cell electrode comprises a silicon oxide.
[Claim 6]
The method of claim 1, wherein the pressure applied in step 1, and the second stage are each from 20 to 50 kgf of lithiated before the secondary cell electrode characterized in that.
[Claim 7]
The method of claim 1, wherein the first step is pre lithiated method of secondary cell electrode, characterized in that applying pressure to the electrode, and lithium metal for 0.1 to 10 hours.
[Claim 8]
The method of claim 1 wherein the second stage is around the lithiated method of secondary cell electrode, characterized in that applying pressure to the electrodes for 0.5 to 10 hours.
[Claim 9]
According to claim 1, wherein the electrode is immersed in step 1, before the electrolyte wetting (wetting) prior lithiated a secondary battery electrode wherein a.
[Claim 10]
The method of claim 9, wherein the electrode of the secondary cell electrode lithiated before how the electrode is characterized in that 1 to 48 hours in the electrolyte wetting.
[Claim 11]
The method of claim 1 wherein the second stage is around the lithiated method of a secondary battery electrode characterized by the yirueojim in an electrolytic solution.
[Claim 12]
To prepare a slurry (slurry) electrode active material, conductive material, and a binder, mixing (mixing); The method comprising a slurry (slurry) wherein the mixing (mixing) on ​​the entire current collector coated (coating); The step of pressing the entire current collector, the coating (coating) with a roller and punching, dried over unit electrodes; Method of manufacturing a secondary cell electrode composed of a; and the step of pre lithiated according to the former method according lithiated the dried electrode unit according to claim 1.
[Claim 13]
Claim 1 to claim 11, wherein the secondary battery including the electrode around the lithiated according to the method of any one of.