One-step synthesis of Li3V2(PO4)3/C positive material with high performance for lithium-ion batteries

Li3V2(PO4)(3)/C positive material was synthesized via a one-step solid-state reaction route using humic acid as both reduction agent and carbon source. The SEM image shows that the particles merge with each other to form a porous structure. This microstructure helps the electrolyte to penetrate the positive materials and promotes good electronic contact among Li3V2(PO4)(3) Particles. Electrochemical tests display that the Li3V2(PO4)(3)/C positive material reaches an initial discharge capacity of 131.2 mA h g(-1) at 0.2 C and exhibits a good cyclic performance at 3 C charge/discharge rates in the range of 3.0-4.3 V. The results indicate that the one-step solid-state reaction is a promising method suitable for mass production of Li3V2(PO4)(3)/C material with high electrochemical performance. (C) 2008 Elsevier Ltd. All rights reserved.