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以氯化钨和氧化石墨烯(GO)为原料,乙醇为溶剂,一步合成了WO3纳米棒/石墨烯纳米复合材料(WO3/RGO).将WO3/RGO纳米复合材料用于锂离子电池负极,并通过充放电测试、循环伏安(CV)和电化学阻抗谱(EIS)技术综合考察了该材料的储锂性能.结果显示,在0.1C(1C=638 mA?g-1)倍率下,复合物的首次放电比容量达到761.4 mAh?g-1,100次循环后可逆容量仍保持在635 mAh?g-1,保持率为83.4%.即使在5C倍率下容量仍高达460 mAh?g-1.由此说明,WO3/RGO纳米复合物具有优异的循环稳定性及倍率性能,可望用于高性能锂离子电池.
WO3 / RGO nanocomposite (WO3 / RGO) was synthesized in one step using tungsten chloride and graphene oxide (GO) as raw materials and ethanol as solvent.WO3 / RGO nanocomposites were used in the negative electrode of lithium ion battery, The lithium storage properties of the material were comprehensively investigated by charge-discharge test, cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS). The results show that at 0.1C (1C = 638 mA? G-1) The initial discharge specific capacity of the composite reaches 761.4 mAh? G-1,100 cycles, the reversible capacity remains at 635 mAh? G-1 with a retention rate of 83.4%. The capacity remains as high as 460 mAh? G-1 even at 5C rate. Thus, WO3 / RGO nanocomposites with excellent cycle stability and rate performance, is expected to be used for high-performance lithium-ion batteries.