The positive electrode active material particles and methods for their preparation, including a shell that includes a core and a lithium-cobalt phosphate, including lithium cobalt oxide [Technology] Mutual citations and related application (s) This application claims the benefit of priority based on Patent Application No. 10-2016-0155956 Korea dated 22 November 2016 and May, all information disclosed in the literature of the Korea patent application are included as part of the specification. The present invention relates to a cathode active material particles and a method comprising a shell including a core and a lithium-cobalt phosphate, including lithium cobalt oxide. . [Background Art] Recently, the prices of energy resources due to the depletion of fossil fuels, are amplified interest in environmental pollution, the demand for eco-friendly alternative sources of energy has become an indispensable factor for the future life. In nuclear power, solar power, and is continuing research for a variety of power generation technologies, such as wind power, tidal power, the power storage device to use the thus producing energy in a more efficient and also it leads a great interest. In particular, the demand of serving as an energy source cell and rapidly increases as the development of technology and the demand for mobile devices increases, in recent years, the use of the secondary battery realization as a power source such as an electric vehicle (EV), hybrid electric vehicle (HEV) and, and the grid's (grid) is enlarged in applications such as power supply through the secondary screen is also used area, a lot of research has been conducted on the battery that can meet the various needs accordingly. Typically, the shaped surface of the battery is high, the demand for prismatic secondary batteries or pouch type secondary battery which can be applied to products such as a mobile phone, a small thickness, the material surface in with the advantages of high energy density, discharge voltage, output stability the high demand for lithium secondary batteries such as lithium ion batteries, lithium ion polymer batteries. A cathode material of the present lithium secondary battery is LiCo0 2 , Ternary (NMC / NCA), LiMn0 4 , LiFeP0 4 is used and the like. LiCo0 in dual 2 In the case of a high price of cobalt, there is low capacity at the same voltage problems than the ternary system, the amount of such ternary increasingly to the high capacity rechargeable battery. However, LiCo0 2 for, until now LiCo0 Since there also clear advantages, such as high rolling density 2 is a section in which a plurality is used, a situation that research for increasing the operating voltage in order to develop high-capacity secondary batteries is in progress. In the case of lithium cobalt oxide, upon high-voltage applied for higher capacity, more particularly,, when the high voltage applied to at least 4.45V LiCo0 2 by As the amount of Li increases the surface becomes unstable, due to the portion of the electrolyte banung gas generator, this safety is lowered such that the swelling occurs, structural instability and possible increases, there is a problem in that the lifetime characteristics degrade rapidly. To solve this problem, the LiCo0 2 on the surface of Al, Ti, Mg, a technique of forming a coating layer comprising a metal such as Zr one also used, in the case of a coating layer made of the metal, the movement of the inter-layer discharge Li ion by interference, there is a problem that can degrade the performance of the secondary battery. Therefore, the situation in a high need for development of a lithium cobalt oxide-based positive electrode active material that can be used as a stable high voltage eu [Detailed Description of the Invention] [SUMMARY] An object of the present invention is to solve the prior art problems and doeeoeun requested from the past gasul ever problem as described above. The inventors of the present application are at the end of extensive research and various experiments in depth, as will be described later, the core of the positive electrode active material particle containing lithium cobalt oxide; And the case, thanks to the half-male of the electrolyte significantly decreases, and the strong P-0 bond comprising a shell (shell) comprising a Lyrium cobalt phosphate having the LAL crystal phase is coated on the surface and tetra head of the core Co was the elution of ionic, lithium cobalt contained in the shell due to the high operating voltage of the phosphorus oxide, under high voltage, the bar is, the surface structural change inhibition, as well as to improve the safety and life characteristics, Lyrium through the shell Since the movement of ions is possible, leading to the confirmation that it is possible to effectively prevent the rate (rate) characteristic deterioration of the secondary battery according to the coating layer formed, and completed the present invention. [Technical Solution] The positive electrode active material particles according to the present invention for achieving this objective is to core including a lithium cobalt oxide represented by the formula (1); And a shell (shell) that is located to the surface of the core containing a lithium cobalt phosphate represented by the formula (2); And including, The shell is characterized by having a head-tetrahydro LAL crystal phase (tetrahedral phase): LiaCo(1-x)Mx02-yAy (1) Wherein M is Ti, Mg, Zn, Si, Al, Zr, V, Mn, Nb , and is at least one of Ni, A is an oxygen substitutional halogen, 0.95 The particle size of the particulate LiCo0 are distributed in the range of 10 to 20 microns 2 prepare, and CH 3 COOLi 2H 2 0 0.26g, (CH 3 COO) 3 Co-4H 2 0 0.96g, and (ΝΗ 4 ) 2 ΗΡθ 4 1 (source) to 0.41g in DI water: 30 (DI water) LiCo0 of the particulate in 500 ml solution is heunhap in a weight ratio of from 2 to 50g common combined after distribution, degrees 220 degrees 10 minutes the temperature was raised by heat treatment for 5 minutes under the pressure 5 bar, the weight ratio of the core and shell, the core: shell = 100: 1, tetra head LAL crystal lithium cobalt phosphate on the surface of the lithium cobalt oxide is coated with from 10 to 100 nanometers which was prepared the positive electrode active material particle. The weight ratio of the core and the shell core was prepared for a second embodiment one cavity a positive electrode active material particles, except that the formation so that the 3: shell = 100. The weight ratio of the core and the shell core was prepared the positive electrode active material particle the same as Example 2, except that the formation such that the 5: shell = 100. Α1 (ΟΗ) 3 using the aqueous solution A1 on the surface of the lithium cobalt oxide 2 0 3 , except that the formation of the shell, including, and in Example 1 was identically prepared the positive electrode active material particle and eu The particle size of the particulate LiCo0 are distributed in the range of 10 to 20 microns 2 prepare, and Co (0 3 ) 3 9H 2 0 and 1.26g (NH 4 ) 2 HP0 4 0.41g, LiOH 0.07g DI water is the solution in was prepared. LiCo0 of the particulate to 500 ml and the solution 2 was a 50g common combined dispersion was filtered, through a vacuum drying recovering the powder and, by heat treatment for 5 hours, the recovered powder from Celsius to 900 degrees, the weight ratio of the core and the shell core was prepared the positive electrode active material particle with a blank lithium cobalt phosphate crystals on the surface of the post 1, and the lithium cobalt oxide is coated with from 10 to 100 nanometers: shell = 100. Using the above-described positive electrode active material particles produced in Example 1-3, and Comparative Examples 1 to 2 as a positive electrode active material, and PVdF as a natural and a conductive material as the binder , the graphite was used. The positive electrode active material: binder: a conductive material in the weight ratio 96: 2: gave mix well in NMP such that the 2 was applied to the A1 foil of thickness 20 μια 130 ° and dried at C the cathode was prepared. The cathode is a lithium foil, EC: DMC: DEC = 1 : 2: 1 1M of LiPF in the solvent 6 were prepared half coin cells using the electrolytic solution containing the. Using the half coin cells prepared in this way make the output characteristics at a rate of 0.2C 2.0C contrast (rate characteristics), and are listed in Table 1. The results. C-rate was measured based on a 1C to 40mA. Layer discharge is conducted between 2.5V to 4.5V cheungjeon was determined to be CC / CV, discharge CC. [Table 1] Referring to Table 1, the crystal phase LiCoP0 LAL tetrahydro head 4, the output of the battery according to Example 1 with a coating lithium cobalt oxide as the positive electrode active material This characteristic can be seen that the most excellent. Moreover, on the blank raising LiCoP0 crystal 4 when compared with lithium cobalt oxide of the positive electrode active material is coated as Example 2, A1 2 0 3 output characteristics compared with the case that the coating can be confirmed that more falling. This is due to the ionic conductivity superior to the open structure than olivine crystal phase compared to the LAL-tetrahydro head crystalline phase. Example 1, and . Use of Comparative Examples 1 to the positive electrode active material produced in the second particles as a positive electrode active material, which was used as a natural hokyeon PVdF as a binder and a conductive material. The positive electrode active material: binder: a conductive material in the weight ratio 96: 2: gave mix well in NMP such that the 2 was applied to the A1 foil of thickness 20 m 130 ° and dried at C the cathode was prepared. 130. After completion of the standard mix well in NMP such that the second coating on a Cu foil of 20 thickness of the negative electrode is a man-made hokyeon, PVd, the carbon black in a weight ratio 96: 2 ° to prepare a negative electrode and dried in an open C. Then via a separator (Celgard) therebetween producing an electrode assembly waves into a launch-type battery case, EC: DMC: DEC = 1 : 2: 1 of 1M of LiPF the solvent 6 a battery using an electrolyte solution containing a cell was prepared. Using the cells prepared in this way using the accelerated rate calorimeter at 4.4V cheungjeon state by measuring the change in temperature and voltage, the current change of the battery cells at the same time, the ARC test was performed, the temperature of the battery cells to go out of control eulra to the results of thermal runaway start temperature measured time in Table 2 and illustrated in Figure 2. [Table 2] Table 2 and 2, the battery is slow, the thermal runaway of Example 1 using the positive electrode active material particles according to the present invention more excellent high-temperature stability You can see exhibits. This, A1 2 0 3 for coating (Comparative Example 1) is formed with sparse particle form in the lithium cobalt oxide surface lithium ions are relatively free core - is little effect to be movable in the shell the electrolytic solution to lowering the yieunjeon conductivity of the shell while the first to occur is a thermal runaway because, LiCoP0 4 the thermal runaway point, since the effect is lowering the Li-ion conductivity in the coating livin crystal phase or crystal phase tetrahydro head LAL all basically the shell for further be delayed. However, the olivine crystal LiCoP0 on 4 for coating (Comparative Example 2), A1 2 0 3 is sparsely distributed in the form of particles in the lithium cobalt oxide surface similar to the less is the effect of lowering the ionic conductivity in the shell of Example 1 compared on the other hand, tetra-head LAL determined LiCoP0 on the fourth case of the coating (example 1) since the coating layer is formed by hydrothermal synthesis in Comparative example 1 and Comparative much more dense coating layer being made than the wet coating method used in example 2, with the result It is because the lithium ion conductivity at significantly lower shell to flow less internal short-circuit leakage current. Using the positive electrode active material particles prepared in Example 1, and Comparative Examples 1 to 2 as a positive electrode active material, which was used as a natural hokyeon PVdF as a binder and a conductive material. The positive electrode active material: binder: a conductive material in the weight ratio 96: 2: gave mix well in NMP such that the 2 was applied to the A1 foil of a thickness of 20 130 ° of the positive electrode and dried at C was prepared. To the cathode as the artificial hokyeon, PVdF, carbon black weight ratio of 96: 2: it gave mix well in NMP such that the second was coated on Cu foil having a thickness of 20 130 ° to thereby prepare a negative electrode and dried at C. Via the membrane (Celgard) therebetween was prepared an electrode assembly into a pouch-shaped battery case, EC: DMC: DEC = 1 : 2: 1 of 1M of LiPF the solvent 6 , using the electrolytic solution containing the cell Sal It was prepared. Thus handed down to the prepared cells, gwacheung to the upper limit voltage to 10V CC / CV mode for 24 hours to compare the cell temperature, and are shown in Figure 3 to the result. Referring to Figure 3, since the present invention the cell temperature of the battery using the active material particles of Examples 1, Comparative Example 1 and lower maintenance than the cell temperature of the battery using the active material particles 2 according to know the more the high voltage stability High have. This oxidation in the high voltage environment reductive banung when tetra head LAL lithium cobalt phosphate kultong efficiency of the cobalt ion in the cargo having a crystal phase is A1 2 0 3 LiCo0 coated 2 Lyrium cobalt phosphate having the (Comparative Example 1), and olivine crystal phase is lower than the storage (Comparative example 2), because the depleted electrolyte solution prior to the oxygen-discharge phenomenon caused by excessive desorption of Li stopping the cell operation. In particular, Comparative Example 1 of the A1 2 0 3 coatings and does not participate in the oxidation-reduction reaction in the high-voltage hwangyeok does not contribute significantly to the prevention cheungjeon. Above has been described with reference to embodiments of the invention, those skilled in the art that the present invention, it will be possible that various variations and the accompanying claims within the scope of the invention. ■ [Industrial Applicability] As described above, the core of the positive electrode active material particles according to the present invention, including a lithium cobalt oxide; And it is coated on the surface of the core and tetra head LAL by comprising a shell (shell) comprising a lithium-cobalt phosphate having a crystal phase, a, Co oxidation states of the shell as compared with the conventional positive electrode active material particle containing lithium cobalt oxide therefore kept below +3 by the male half of the electrolyte solution significantly reduced, it is possible to prevent problems such as safety of the degradation and swelling caused by gas generation, low dissolution of Co ions by the strong P-0 bond, the shell is cobalt, which comprises - under due to the high operating voltage of the phosphorus oxide, high-voltage, surface structure, so changes are inhibited, while improving the structural stability of the positive electrode active material particles, can improve the life characteristics of secondary batteries, through the shell possible movement of lithium ions because it effectively prevents the rate (rate) characteristic deterioration of the secondary battery according to the coating layer There is an effect that it is possible. Further, the olivine crystal phase in the shell of the anode active material particles according to the present invention has a more open structure in comparison with, by having the Central crystalline tetra head to lithium cobalt phosphate on livin determining ionic conductivity is more excellent, and a high-temperature environment as the phase change, by decreasing the ion conductivity in the shell less internal short-circuit leakage current and improved articulated high temperature stability, in a high voltage environment, the oxidation of the cobalt ion-lithium cobalt having a blank crystalline phase is kultong efficiency in reducing banung up phosphate is lower than the cargo, the depleted electrolyte solution prior to the oxygen release occurs due to excessive desorption of Li stopping the cell operation, so there is an effect that the safety also improves. Claims To the core containing the Lyrium cobalt oxide represented by the formula (1); And a shell (shell) that is located to the surface of the core containing a lithium cobalt phosphate represented by the formula (2); And including, The shell has a positive electrode, characterized in that tetra-head LAL crystal phase (phase tetrahedral) particles of active material: LiaCo(1-x)Mx02-yAy (1) Wherein, ■ M is Ti, Mg, Zn, Si, Al, Zr, V, Mn, Nb , and is at least one of Ni, A is an oxygen substitutional halogen, 0.95