公开(公告)号：US20160020456A1

公开(公告)日：2016-01-21

申请号：US14395451

申请日：2013-03-04

Applicant: KOREA ELECTRONICS TECHNOLOGY INSTITUTE

Inventor： Junho SONG ,  Woosuk CHO ,  Dongjin KIM ,  Yeonhee KIM ,  Youngjun KIM

IPC: H01M4/131 ,  C01G51/00 ,  H01M4/04 ,  H01M4/525

CPC classification number: H01M4/131 ,  C01G51/04 ,  C01G51/42 ,  C01P2002/52 ,  C01P2004/32 ,  C01P2004/61 ,  C01P2006/40 ,  H01M4/0471 ,  H01M4/0497 ,  H01M4/525 ,  H01M10/052 ,  H01M2004/028

Abstract: The present invention relates to a cathode material for a nonaqueous lithium secondary battery using spherical cobalt hydroxide to inhibit the structural collapse of a final cathode material at a high voltage by preparing spherical cobalt hydroxide in which a dissimilar metal is uniformly substituted by using a precipitation reaction in a liquid phase, thereby improving lifetime characteristics even under high voltage charge/discharge conditions of 4.5 V. According to the present invention, it is possible to prepare spherical cobalt hydroxide having a particle size of 15-30 μm by precipitating a cobalt material, a hydroxyl group material, a dissimilar metal material for substitution and an amine-based material so as to have a composition represented by Co1-xMx(OH)2 (0.00≦x≦0.10, M=Al, Mg, Ti, and the like). Also, it is possible to prepare spherical cobalt oxide having a particle size of 10-25 μm by heat-treating the prepared cobalt hydroxide at 500-800° C.

Abstract translation: 本发明涉及一种使用球形氢氧化钴的非水锂二次电池的阴极材料，其通过制备通过使用沉淀反应均匀地取代异氰酸金属的球形氢氧化钴来抑制高电压下的最终正极材料的结构崩溃 在液相中，即使在4.5V的高电压充放电条件下也能够提高寿命特性。根据本发明，可以通过使钴材料析出来制备粒径为15〜30μm的球形氢氧化钴， 羟基基团材料，用于取代的异种金属材料和胺类材料，以具有由Co1-xMx（OH）2（0.00＆amp; NlE; x＆amp; NlE; 0.10，M = Al，Mg，Ti和 喜欢）。 此外，可以通过在500-800℃热处理制备的氢氧化钴来制备粒径为10-25μm的球形氧化钴。