Journal
ELECTROCHEMISTRY COMMUNICATIONS
Volume 7, Issue 2, Pages 156-160Publisher
ELSEVIER SCIENCE INC
DOI: 10.1016/j.elecom.2004.11.008
Keywords
lithium-ion battery; iron silicate; cathode material
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Phase-pure lithium iron silicate (Li2FeSiO4) has been prepared successfully. Its ambient temperature structure has been determined by X-ray diffraction and its electrochemical performance characterised at 60 degreesC. The resulting cyclic voltammogram suggests a phase transition to a more stable structure after the first cycle. This could involve a structural ordering process from a solid-solution to a long-range-ordered structure. The initial charge capacity of 165 mAh/g (99% of the theoretical value) stabilises after a few cycles to around 140 mAh/g (84% of the theoretical value). (C) 2004 Elsevier B.V. All rights reserved.
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