Abstract
Na3V2(PO4)3 (NVP) powders were prepared by solution synthesis method using cetyltrimethylammonium bromide (CTAB) as additive. The structural, microstructure and electrochemical performances of NVP powders were characterized as a function of CTAB amounts. The porous carbon-coated particles were formed by burning of CTAB during calcination at 850 °C. The thickness of carbon layer, specific surface area and contribution of sp2 carbon type domains increased by the increase of CTAB contents. The Na3V2(PO4)3 powders prepared by 0.8 mmol CTAB exhibited a high specific capacity (112.2 mAhg−1, 1C) and a high capability rate performance (88.7 mAhg−1, 10C), due to their higher electronic conductivity and sodium diffusion coefficient.
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