Title :
Structural and electrochemical characteristics of Li1+xMn2+xO4 and LiMn2O4-δ for secondary lithium batteries
Author :
Wang, G.X. ; Bradhurst, D.H. ; Dou, S.X. ; Liu, H.K.
Author_Institution :
Inst. for Mater. Technol. & Manauf., Wollongong Univ., NSW, Australia
Abstract :
A series of excess lithium doped and oxygen deficient lithium manganese oxide spinels were prepared in order to investigate the dependence of electrochemical performance on the sample structure and chemical composition. Test cells were constructed containing cathodes of synthesised compounds. Li/Li1+xMn2+xO4 cells demonstrated improved capacity retention on cycling. However, the rechargeability of Li/LiMn2O4-δ cell was degraded. Structural damage of the spinel LiMn2O4 electrode probably is the main reason responsible for capacity fade. The relation between the capacity retention and the Jahn-Teller effect is discussed in detail
Keywords :
Jahn-Teller effect; cathodes; electrochemistry; lithium; lithium compounds; manganese compounds; secondary cells; Jahn-Teller effect; Li-LiMn2O4; Li/Li1+xMn2+xO4 cells; Li/LiMn2O4-δ cell rechargeability; Li1+xMn2+xO4; LiMn2O4-δ; capacity fade; capacity retention; cathodes; chemical composition; cycling; electrochemical characteristics; electrochemical performance; excess lithium doped LiMn2O4 spinels; improved capacity retention; oxygen deficient Li-Mn2O4 spinels; secondary lithium batteries; spinel LiMn2O4 electrode; structural characteristics; structural damage; synthesised compounds; Anodes; Batteries; Cathodes; Ethanol; Lithium; Manganese; Powders; Temperature; Testing; X-ray diffraction;
Conference_Titel :
Battery Conference on Applications and Advances, 1998., The Thirteenth Annual
Conference_Location :
Long Beach, CA
Print_ISBN :
0-7803-4098-1
DOI :
10.1109/BCAA.1998.653898
