Electrochemical and structural study of LiCoPO4-based electrodes

被引:140
作者
Bramnik, NN [1 ]
Bramnik, KG [1 ]
Buhrmester, T [1 ]
Baehtz, C [1 ]
Ehrenberg, H [1 ]
Fuess, H [1 ]
机构
[1] Tech Univ Darmstadt, Dept Mat Sci, D-64287 Darmstadt, Germany
关键词
rechargeable batteries; intercalation; lithium; olivine-type structure; cathode;
D O I
10.1007/s10008-004-0497-x
中图分类号
O646 [电化学、电解、磁化学];
学科分类号
081704 ;
摘要
LiCoPO4 samples were synthesized by two different techniques (high-temperature solid-state reaction and lower-temperature synthesis using NH4CoPO4.H2O as precursor) and tested as cathode materials for 5-V lithium batteries. An irreversible lithium deinsertion was observed for the high-temperature sample. In contrast, the application of lower-temperature synthesis led to a significant improvement of the lithium storage reversibility. Different delithiation mechanisms in LiCoPO4 were found for the samples obtained by different synthetic techniques. The nature of capacity fading during cycling of the cells is discussed.
引用
收藏
页码:558 / 564
页数:7
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