Preparation and Characterization of Li3V2(PO4)3 Cathode Material for Lithium Ion Batteries

doi:10.3724/SP.J.1077.2006.01097

Abstract

Abstract: Monoclinic lithium vanadium phosphate Li₃V₂(PO₄)₃ is a very promising polyanion-type cathode material for lithium ion batteries. In this work, LiOH·H₂O, V₂O₅, H₃PO₄and sucros(C₁₂H₂₂O₁₁) were homogeneously mixed with certain molar ratios by ball-milling, and then sintered at 800℃ for 16h in N₂. The Li₃V₂(PO₄)₃ powders were finally synthesized via carbothermal reduction process. The structure and morphology of Li₃V₂(PO₄)₃ powders were characterized by XRD and SEM. At charge-discharge cut-off voltages of 3.0-4.3V and 3.0-4.8V, the material shows rather high specific capacity, excellent cycling performance and rate capability. At charge-discharge cut-off voltages of 1.5-4.8V, the material shows very high specific capacity but poor cycling performance.

Key words: lithium ion batteries, cathode material, Li3V2(PO4)3

YING Jie-Rong,GAO Jian,JIANG Chang-Yin,LI Wei,TANG Chang-Ping. Preparation and Characterization of Li₃V₂(PO₄)₃ Cathode Material for Lithium Ion Batteries[J]. Journal of Inorganic Materials, DOI: 10.3724/SP.J.1077.2006.01097.

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Preparation and Characterization of Li₃V₂(PO₄)₃ Cathode Material for Lithium Ion Batteries

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