公开(公告)号：US20080311473A1

公开(公告)日：2008-12-18

申请号：US12034265

申请日：2008-02-20

申请人： Hideo SASAOKA ,  Ryuuichi Kuzuo ,  Atsushi Fukui ,  Mitsukuni Kondou ,  Shin Imaizumi ,  Kensuke Nakura ,  Shuji Tsutsumi

发明人： Hideo SASAOKA ,  Ryuuichi Kuzuo ,  Atsushi Fukui ,  Mitsukuni Kondou ,  Shin Imaizumi ,  Kensuke Nakura ,  Shuji Tsutsumi

IPC分类号： H01M4/00 ,  H01M4/88

CPC分类号： H01M4/525 ,  H01M4/364 ,  H01M4/485 ,  H01M4/505 ,  H01M10/052 ,  H01M2004/028 ,  Y02E60/122 ,  Y02P70/54

摘要： The present invention provides a cathode active material that makes possible a high capacity nonaqueous electrolyte secondary battery that has excellent discharge load characteristics that provide both good cycle characteristics and thermal stability. The cathode active material comprises a lithium nickel composite oxide having the compositional formula LiNi1−aMaO2 (where, M is at least one kind of element that is selected from among a transitional metal other than Ni, a group 2 element, and group 13 element, and 0.01≦a≦0.5) to which fine lithium manganese composite oxide particle adhere to the surface thereof. This lithium nickel composite oxide is obtained by adding manganese salt solution to a lithium nickel composite oxide slurry, causing manganese hydroxide that contains lithium to adhere to the surface of the lithium nickel composite oxide particles, and then baking that lithium nickel composite oxide.

摘要翻译： 本发明提供一种阴极活性材料，其使得具有优异的放电负荷特性的提供良好的循环特性和热稳定性的高容量非水电解质二次电池成为可能。 正极活性物质包含具有组成式LiNi1-aMaO2的锂镍复合氧化物（其中，M为选自Ni之外的过渡金属，第2族元素和13族元素中的至少一种元素， 和0.01 <= a <= 0.5），细小的锂锰复合氧化物颗粒附着在其表面上。 该锂镍复合氧化物是通过向锂镍复合氧化物浆料中添加锰盐溶液而得到的，其中含有锂的氢氧化锰粘附在锂镍复合氧化物粒子的表面上，然后焙烧该锂镍复合氧化物。