Influence of isovalent ion substitution on the electrochemical performance of LiCoPO{sub 4}
- Materials Science Research Centre and Department of Chemistry, Indian Institute of Technology Madras, Chennai 600036 (India)
LiCo{sub 1-x}M {sub x}PO{sub 4} (M = Mg{sup 2+}, Mn{sup 2+} and Ni{sup 2+}; 0 {<=} x {<=} 0.2) compounds have been synthesized by solid-state reaction method and studied as cathode materials for secondary lithium batteries. LiCoPO{sub 4} exhibits a discharge plateau at {approx}4.7 V with an initial discharge capacity of 125 mAh/g and on cycling capacity falls. Substitution of Co{sup 2+} with Mg{sup 2+}/Mn{sup 2+}/Ni{sup 2+} in LiCoPO{sub 4} has an influence on the initial discharge capacity and on cycling behaviour. The capacity retention of LiCoPO{sub 4} is improved by manganese substitution. Among the manganese substituted phases, LiCo{sub 0.95}Mn{sub 0.05}PO{sub 4} shows good reversible capacity of {approx}50 mAh/g.
- OSTI ID:
- 20888092
- Journal Information:
- Materials Research Bulletin, Vol. 40, Issue 10; Other Information: DOI: 10.1016/j.materresbull.2005.05.011; PII: S0025-5408(05)00198-4; Copyright (c) 2005 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved; Country of input: International Atomic Energy Agency (IAEA); ISSN 0025-5408
- Country of Publication:
- United States
- Language:
- English
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