发明名称 |
Highly homogeneous spinel Li1+XMn2-XO4+Y intercalation compounds and method for preparing same |
摘要 |
A novel method of preparing a spinel Li1+XMn2-XO4+Y intercalation compound with low lattice distortion and a highly ordered and homogeneous structure for 4 V secondary lithium and lithium ion cells is provided. The method of preparing the spinel Li1+XMn2-XO4+Y intercalation compound comprises providing a spinel Li1+XMn2-XO4 intercalation compound having a lithium to manganese mole ratio of between about 1.02:2 and 1.1:2 and firing the spinel at different temperature ranges with corresponding gas flow rates to form the spinel Li1+XMn2-XO4+Y intercalation compounds. The spinel Li1+XMn2-XO4+Y intercalation compounds have a mean X value of between about 0.01 and 0.05, a mean Y value of between about -0.02 and 0.04 and a full width at half maximum of the x-ray diffraction peaks at a diffraction angle 2 theta of planes (400) and (440) using CuK alpha 1 rays of between about 0.08 DEG and 0.13 DEG . The spinel Li1+XMn2-XO4+Y intercalation compounds may be used in the positive electrodes of secondary lithium and lithium ion cells to provide cells having high specific capacities and long cycling lives.
|
申请公布号 |
US5766800(A) |
申请公布日期 |
1998.06.16 |
申请号 |
US19970867160 |
申请日期 |
1997.06.02 |
申请人 |
FMC CORPORATION |
发明人 |
MANEV, VESSELIN;FAULKNER, TITUS |
分类号 |
C01B31/02;C01G45/00;H01M4/131;H01M4/50;H01M4/505;H01M10/052;H01M10/36;(IPC1-7):H01M4/50;C01G45/12 |
主分类号 |
C01B31/02 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|