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Electrode For All Solid State Battery, Comprising Solid Electrolyte

Abstract: The present invention relates to an electrode for an all-solid-state battery, comprising an electrode current collector and an electrode active material layer formed on at least one surface of the electrode current collector, wherein the electrode active material layer comprises: a plurality of electrode active material particles; a solid electrolyte which is coated on at least parts of the surfaces of the plurality of electrode active material particles and connects the plurality of electrode active material particles to each other; and linear structures dispersed between the plurality of electrode active material particles.

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Patent Information

Application #
Filing Date
14 August 2019
Publication Number
11/2020
Publication Type
INA
Invention Field
ELECTRICAL
Status
Email
mahua.ray@remfry.com
Parent Application
Patent Number
Legal Status
Grant Date
2024-02-15
Renewal Date

Applicants

LG CHEM, LTD.
128, Yeoui-daero, Yeongdeungpo-gu, Seoul 07336

Inventors

1. LEE, Jung-Pil
LG Chem Research Park, 188, Munji-ro, Yuseong-gu, Daejeon 34122
2. KIM, Ji-Young
LG Chem Research Park, 188, Munji-ro, Yuseong-gu, Daejeon 34122
3. KIM, Hyo-Sik
LG Chem Research Park, 188, Munji-ro, Yuseong-gu, Daejeon 34122
4. MOK, Eun-Kyung
LG Chem Research Park, 188, Munji-ro, Yuseong-gu, Daejeon 34122
5. WOO, Seung-He
LG Chem Research Park, 188, Munji-ro, Yuseong-gu, Daejeon 34122
6. JUNG, Hye-Ri
LG Chem Research Park, 188, Munji-ro, Yuseong-gu, Daejeon 34122

Specification

Art [1]This application claims priority based on the Korea Patent Application No. 10-2017-0117375, filed on September 13, 2017. The present invention relates to the all-solid battery, the electrode comprising a solid electrolyte, and more particularly to all-solid battery electrode that can easily discharge the gas generated during the charge and discharge to the outside. BACKGROUND [2]Lithium ion batteries using a liquid electrolyte may lead to a risk of damage when the membrane is deformed by an external impact or yeoseo structure in which a cathode and an anode compartment by the membrane may cause a short circuit and cause overheating or explosion. Therefore, development of a solid electrolyte to ensure the safety in the field of lithium ion secondary battery can be a very important task. [3] The lithium secondary battery using the solid electrolyte is the safety of the battery increases, can prevent leakage of the electrolyte solution there is improved the reliability of the battery, there is a merit that is easy to manufacture a thin battery. In addition, it is possible to use a lithium metal as a negative electrode to improve the energy density, and thus the application is expected of such high-capacity secondary battery for an electric vehicle with a compact secondary battery has received attention as next-generation batteries. [4] 1 is a view showing a cross section of the electrode after charging and discharging of the lithium secondary battery comprising a solid electrolyte, electrodes are applied. Fig. Referring to Figure 1, there is due to the reaction of the solid electrolyte 22, the charge and discharge of the lithium secondary battery, when the electrode active material particles 21, including the solid electrolyte 22, gas is generated, this gas is in the liquid electrolyte system, Unlike not being discharged to the external electrode is trapped in the electrode. Thus an increased electrode interfacial resistance, there is a problem that the battery life decreases. Detailed Description of the Invention SUMMARY [5] Accordingly, the object of the present invention, to provide an all-solid battery electrode that can easily discharge the gas resulting from the reaction of the electrode active material and the solid electrolyte to the outer electrode. Problem solving means [6] The present invention provides the all-solid battery electrode that can solve the above problems. As for the first aspect of the all-solid battery electrode of the present invention, the electrode current collector; And wherein the electrode includes an electrode active material layer formed on at least one surface of the current collector, wherein the electrode active material layer, a plurality of electrode active material particles, is coated on at least a portion of the plurality of electrode active material particle surface, and the plurality of electrode active material particles a solid electrolyte which connects to each other and to a linear structure of which is distributed among the plurality of electrode active material particles. [7] The method of claim 2 wherein the first side is the side of the present invention, the electrode active material layer is to further comprise a conductive material are dispersed on the surface and the inside or on the surface of the solid electrolyte of the plurality of electrode active material particles. [8] According to a third aspect is the above-described aspects of the invention which will in the micropore channel between the plurality of electrode active material particles and the linear structure is formed. [9] The fourth aspect is the solid electrolyte, a polymer solid electrolyte, polymer gel electrolyte, a sulfide-based solid electrolyte and the oxide-based one or a mixture of two or more of those selected from the group consisting of a solid electrolyte according to the above-described one aspect of the present invention intended to cover. [10] A fifth aspect of the present invention to have the linear structure according to any one of the preceding aspects include the carbon material, or a ceramic material. [11] The sixth aspect of the invention is the one described above one side and of the linear structure include the carbon material, the carbon material is vapor-grown carbon fibers (VGCF), carbon nanotubes (CNT), and carbon nanofiber (CNF) any one selected from the group consisting of or to include mixtures of two or more of these. [12] A seventh aspect according to any one of the foregoing aspects of the linear structure of the present invention comprises a ceramic jaeryoeul, to the ceramic material comprises at least one member selected from metal oxides and metal nitrides. [13] An eighth aspect is of the linear structural body according to any one of the foregoing aspects of the present invention comprises a ceramic material and a linear structure is that the surface is coated with a conductive material. [14] According to a ninth aspect it is an aspect of the present invention the above-described one, but the length of the linear structural body is 1 to 100㎛. [15] On the other hand, the present invention is for the all-solid battery, the battery comprises a solid electrolyte layer interposed between the positive electrode and the negative electrode and the negative electrode and the positive electrode, at least one of the positive electrode and the negative electrode is in accordance with any of the aforementioned aspects to the electrode. [16] Effects of the Invention [17] According to one embodiment of the invention, the reaction with the generated gas due to the electrode active material and the solid electrolyte, since the electrode active material to be in accordance with a linear structure, which is distributed among the particles discharged to the electrodes outside the gas to facilitate the electrode inside it can be removed. [18] This makes it possible to suppress an increase in resistance at the electrode surface to prevent the problem that the battery life decreases. Brief Description of the Drawings [19] Following figures attached to this specification is intended to illustrate preferred embodiments of the present invention, the components which serve to further understand the teachings of the present invention with the content of the above-described invention, the invention is only to details set forth in those figures is limited shall not be interpreted. On the other hand, the shape of the elements in the figures contained in this specification, the size, the accumulation rate or the like may be exaggerated to emphasize a more clear description. [20] 1 is a view showing a cross section of the electrode after charging and discharging of the battery including the electrode of the conventional solid electrolyte is applied. Fig. [21] 2 is a view showing the cross section of the electrode after charging and discharging of the battery including the electrode in accordance with one embodiment of the present invention. Mode for the Invention [22] With reference to the drawings the present invention will be described in detail. Herein and in the terms or words used in the claims is general and not be construed as limited to the dictionary meanings are not, the inventor can adequately define terms to describe his own invention in the best way on the basis of the principle that the interpreted based on the meanings and concepts corresponding to technical aspects of the present invention. [23] Accordingly, the configuration described in the examples and figures disclosed herein are merely nothing but the embodiment most preferred embodiment of the invention, a not intended to limit the scope of the present invention, a variety can be made thereto according to the present application point It should be understood that there are equivalents and modifications. [24] Throughout the present specification, when any and "includes" section is any component, which is not to exclude other components not specifically described against which means that it is possible to further include other components. [25] Further, "substantially free" herein the term "about" is used throughout, and the like when the manufacturing and material tolerances inherent in the stated meaning to be presented is used as a means close to the value at or figures aid the understanding of the present accurate or is used to prevent the use of unfair self absolute figures of the unscrupulous referred to the disclosure violations. [26] Throughout the present specification, "A and / or B" means a base material of "A or B or both". [27] The specific terms used in the description of the invention are not, leading not restrictive of for convenience. "Right", the word "left", "top surface" or the "if" represent the direction of the in the figures the reference is made. Of 'inward' and 'outward' words represent each specified apparatus, a direction toward the geometrical center of the system and its member or away from it. "Front", "rear", "upper", "lower" and related words and phrases denote the position and orientation of the drawing in which reference should made restrictive. These terms include the words, words of similar meaning and its derivatives listed above. [28] Total all-solid battery, the electrode, the current collector of the present invention; And wherein the electrode includes an electrode active material layer formed on at least one surface of the current collector, wherein the electrode active material layer, a plurality of electrode active material particles, is coated on at least a portion of the plurality of electrode active material particle surface, and the plurality of electrode active material particles a solid electrolyte which connects to each other and characterized in that it comprises a linear structure, which is distributed among the plurality of electrode active material particles. [29] 2 is a view showing the cross section of the electrode after charging and discharging of the battery including the electrode in accordance with one embodiment of the present invention. Referring to Figure 2, the generated gas due to reaction of electrode active material particles 21 and the solid electrolyte (22), along the electrode active material particles 21 in the structure 24 of the linear, which is distributed between, and more specifically, there is an effect that can be through the pores around the linear structure formed by the linear structural body, by having the discharge electrode to the outside, the gas is easily removed the residual gas of the internal electrodes are not isolated in the electrode. This makes it possible to suppress the volume expansion of the electrode due to the gas issued, and to suppress an increase in resistance at the electrode surface preventing the problem that the battery life decreases. There may be a fine pore due to the space in the interstitial volume, caused by the bonding of the components between the linear and the plurality of electrode active material particle structure is formed on the electrode in accordance with one embodiment of the invention, these microvoids are connected has a microchannel that is in communication with the external electrodes can be formed. These channels may be a gas of the internal electrode being provided with a gas flow discharged more efficiently to the external electrode. [30] In one embodiment of the invention, in the linear structure, but may comprise a carbon material and / or ceramic material, it is not limited thereto. Of the linear structure as having a rigidity capable of maintaining the linear shape in the electrode, if it does not cause a side reaction in the electrode it can be used for different materials. If the carbon material is preferably a linear structure in terms of that conductivity it can be imparted. On the other hand, the ceramic materials are advantageous in terms of maintaining the shape of the linear process of the medium and / or cells produced electrode manufacturing process. [31] In one embodiment of the invention, the carbon material, whereby but not limited to, VGCF (vapor-grown carbon fibers), a CNT (carbon nanotube) and at least one selected of the CNF (carbon nanofibers) can be used . [32] In one embodiment of the invention, as the ceramic material may comprise a HNT (halloysite nanotube, Sigma-Aldrich社), metal oxide and / or metal nitride. The metal oxide or nitride include, but are not limited to, may be an oxide or nitride including Si, Al, Ti, Zn, Zr, 1 or more kinds selected from Fe. For example, the metal oxide is halloysite, Lai zeolites, TiO 2 , ZnO, ZnO 2 , Fe 2 O 3 , Fe 3 O 4 , SiO 2 , Al 2 O 3 , ZrO 2 may be at least a selected one kinds . On the other hand, in an embodiment of the present invention, in the case of the linear structure of a ceramic material wherein the material may be surface-coated with a conductive material. The conductive material may, for example, include carbon black such as acetylene black, Ketjen black, channel black, furnace black, lamp black, thermal black. [33] In particular, in the linear structure, it may be present in various forms, such as load, whiskers, wires, fibers, tubes. [34] In one embodiment of the invention, in terms of the linear structure for forming the gas flow path of the microchannel is preferably with the aspect ratio of 3 or more. For example, the linear structure is that its length in the range of the aspect ratio may be 1㎛ to 100 ㎛, may preferably be 5㎛ to 50 ㎛. By satisfying such a length, the fine pores are produced between the electrode active material particles as well as a linear structure, a gas generated during the charge and discharge can be easily discharged to the outside of the electrode through the fine pores thus formed. On the other hand, in the present invention, the linear structure as to satisfy the aspect ratio may be due to 30nm to 10㎛ diameter. [35] On the other hand, in an embodiment of the present invention, the linear structures may be indicative of the range of 10MPa to 100MPa in terms of tensile strength. When the tensile strength of the linear relief second satisfy the above range is not a linear structure deformation at the electrode rolling process can be maintained for the first aspect ratio, and thus can be a resin that the gas discharge ensure a desired, and the form is to be kept stable can. In addition, the electrode active material layer may be further comprising a conductive material are dispersed on the surface and the inside or on the surface of the solid electrolyte of the plurality of electrode active material particles. [36] At this time, based on the total weight of the mixture containing an electrode active material with the conductive material is typically added at 0.1 to 30% 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 metal oxides such as titanium oxide; Polyester may include one or two or more kinds of mixtures selected from a conductive material such as phenylene derivatives. [37] In the present invention, the electrode there comprises a current collector, in total this current collector may be used as appropriate depending on the polarity of the collector electrode known in the rechargeable battery field as representing the electrical conductivity, such as metal sheet . [38] On the other hand, in the present invention, the all-solid battery electrode may be any one of a cathode and an anode. If the electrode is the cathode, the electrode active material is possible if the material used as the negative electrode active material of a lithium ion secondary battery or the like can be used. For example, the negative electrode active material I is carbon such as graphitized carbon, graphite-based carbon; Li x Fe 2 O 3 (0≤x≤1), Li x WO 2 (0≤x≤1), Sn x Me 1 - x Me ' y O z (Me: Mn, Fe, Pb, Ge; Me' : Al, B, P, Si, Group 1 of the Periodic Table, Group 2, Group 3 element, a halogen; a metal composite oxide, such as 1≤z≤8); 0

Documents

Application Documents

# Name Date
1 201917032897.pdf 2019-08-14
2 201917032897-TRANSLATIOIN OF PRIOIRTY DOCUMENTS ETC. [14-08-2019(online)].pdf 2019-08-14
3 201917032897-STATEMENT OF UNDERTAKING (FORM 3) [14-08-2019(online)].pdf 2019-08-14
4 201917032897-PROOF OF RIGHT [14-08-2019(online)].pdf 2019-08-14
5 201917032897-PRIORITY DOCUMENTS [14-08-2019(online)].pdf 2019-08-14
6 201917032897-FORM-26 [14-08-2019(online)].pdf 2019-08-14
7 201917032897-FORM 1 [14-08-2019(online)].pdf 2019-08-14
8 201917032897-DRAWINGS [14-08-2019(online)].pdf 2019-08-14
9 201917032897-DECLARATION OF INVENTORSHIP (FORM 5) [14-08-2019(online)].pdf 2019-08-14
10 201917032897-COMPLETE SPECIFICATION [14-08-2019(online)].pdf 2019-08-14
11 201917032897-Power of Attorney-160819.pdf 2019-08-23
12 201917032897-Correspondence-160819.pdf 2019-08-23
13 201917032897-Correspondence-160819-.pdf 2019-08-23
14 201917032897-OTHERS-160819.pdf 2019-09-02
15 abstract.jpg 2019-09-04
16 201917032897-Verified English translation (MANDATORY) [12-10-2019(online)].pdf 2019-10-12
17 201917032897-OTHERS-161019.pdf 2019-10-17
18 201917032897-Correspondence-161019.pdf 2019-10-17
19 201917032897-FORM 3 [14-02-2020(online)].pdf 2020-02-14
20 201917032897-FORM 3 [11-08-2020(online)].pdf 2020-08-11
21 201917032897-FORM 3 [08-02-2021(online)].pdf 2021-02-08
22 201917032897-FORM 18 [18-03-2021(online)].pdf 2021-03-18
23 201917032897-FORM 3 [05-08-2021(online)].pdf 2021-08-05
24 201917032897-FER.pdf 2022-02-02
25 201917032897-FORM 3 [17-06-2022(online)].pdf 2022-06-17
26 201917032897-OTHERS [29-07-2022(online)].pdf 2022-07-29
27 201917032897-FER_SER_REPLY [29-07-2022(online)].pdf 2022-07-29
28 201917032897-DRAWING [29-07-2022(online)].pdf 2022-07-29
29 201917032897-CLAIMS [29-07-2022(online)].pdf 2022-07-29
30 201917032897-ABSTRACT [29-07-2022(online)].pdf 2022-07-29
31 201917032897-PA [23-11-2022(online)].pdf 2022-11-23
32 201917032897-ASSIGNMENT DOCUMENTS [23-11-2022(online)].pdf 2022-11-23
33 201917032897-8(i)-Substitution-Change Of Applicant - Form 6 [23-11-2022(online)].pdf 2022-11-23
34 201917032897-Response to office action [16-12-2022(online)].pdf 2022-12-16
35 201917032897-FORM 3 [13-02-2023(online)].pdf 2023-02-13
36 201917032897-Response to office action [02-05-2023(online)].pdf 2023-05-02
37 201917032897-Response to office action [23-10-2023(online)].pdf 2023-10-23
38 201917032897-FORM 3 [31-10-2023(online)].pdf 2023-10-31
39 201917032897-US(14)-HearingNotice-(HearingDate-30-01-2024).pdf 2023-12-28
40 201917032897-Correspondence to notify the Controller [24-01-2024(online)].pdf 2024-01-24
41 201917032897-Written submissions and relevant documents [14-02-2024(online)].pdf 2024-02-14
42 201917032897-PatentCertificate15-02-2024.pdf 2024-02-15
43 201917032897-IntimationOfGrant15-02-2024.pdf 2024-02-15

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