公开(公告)号：US20010028874A1

公开(公告)日：2001-10-11

申请号：US09849246

申请日：2001-05-07

Applicant: SAMSUNG DISPLAY DEVICES CO., LTD.

Inventor： Jae-Phil Cho ,  Geun-Bae Kim ,  Yong-Chul Park ,  Sung-Soo Kim

IPC: C01G051/04 ,  H01M004/32

CPC classification number: H01M4/131 ,  C01G53/42 ,  C01P2002/54 ,  C01P2004/03 ,  C01P2004/20 ,  C01P2004/32 ,  C01P2004/52 ,  C01P2004/61 ,  C01P2004/62 ,  C01P2006/11 ,  C01P2006/40 ,  H01M4/1391 ,  H01M4/485 ,  H01M4/525

Abstract: A lithium composite oxide (LiaNi(1-x-y)CoxMyO2, where M is at least one metal atom selected from the group consisting of Al, Ca, Mg and B, anull0.97null1.05, xnull0.1null0.3, and ynull0null0.05), prepared by a method including the steps of: (a) coprecipitating a NinullCo composite hydroxide by adding an aqueous ammonia solution as a complexing agent, and an alkaline solution as a pH-adjusting agent, to an aqueous mixed solution containing a cobalt salt and a nickel salt; (b) adding lithium hydroxide to the composite hydroxide and thermally treating the mixture at 280null420null C.; and (c) thermally treating the resultant of the step (b) at 650null750null C. The average particle diameter of the lithium composite oxide decreases, or the tap density thereof increases, depending on the coprecipitation time. When the lithium composite oxide is used as a positive electrode active material, a lithium ion secondary cell having a high capacity can be obtained.

Abstract translation: 一种锂复合氧化物（LiaNi（1-xy）CoxMyO2，其中M是选自Al，Ca，Mg和B中的至少一种金属原子，a = 0.97〜1.05，x = 0.1〜0.3，y = 0〜0.05），通过以下方法制备：（a）通过将氨水溶液作为络合剂和作为pH调节剂的碱性溶液加入到含水混合物中来共沉淀Ni-Co复合氢氧化物 含有钴盐和镍盐的溶液; （b）向复合氢氧化物中加入氢氧化锂并在280〜420℃下热处理该混合物。 和（c）在650〜750℃下热处理步骤（b）的结果。根据共沉淀时间，锂复合氧化物的平均粒径减小或振实密度增加。 当锂复合氧化物用作正极活性材料时，可以获得具有高容量的锂离子二次电池。