Abstract
Li 3V 2(PO 4) 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 Li 3V 2(PO 4) 3 particles. Electrochemical tests display that the Li 3V 2(PO 4) 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 Li 3V 2(PO 4) 3/C material with high electrochemical performance.
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