4.8 Article Proceedings Paper

LiVOPO4: A cathode material for 4 V lithium ion batteries

Journal

JOURNAL OF POWER SOURCES
Volume 189, Issue 1, Pages 786-789

Publisher

ELSEVIER SCIENCE BV
DOI: 10.1016/j.jpowsour.2008.07.092

Keywords

Li ion batteries; Cathode material; beta-LiVOPO4; RuO2

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Electroactive lithium vanadyl phosphate, beta-LiVOPO4, was synthesized via a sol-gel route, and beta-LiVOPO4/RuO2 composite was subsequently prepared by heating RuCl3 in the network of beta-LiVOPO4 particles. X-ray diffraction patterns showed that beta-LiVOPO4 has an orthorhombic structure with space group of Pnma. Energy dispersive X-ray spectroscopy dot mappings revealed that ruthenium was homogeneously distributed among beta-LiVOPO4 particles. Compared with pristine beta-LiVOPO4, beta-LiVOPO4/RuO2 composite presented better electrochemical Li ion intercalation performances due to the enhanced electrical conductivity and Li ion diffusion. beta-LiVOPO4 may be prospective for the application to high-voltage Li ion batteries if the electrical conductivity is improved through a practical way. (C) 2008 Elsevier B.V. All rights reserved.

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