以VO(OC3H7)3、丙酮和水为原材料,采用溶胶-凝胶技术制备溶胶,通过溶剂替换工艺在常压下制备出了纳米多孔结构的V2O5气凝胶材料.使用扫描电镜(SEM)、透射电镜(TEM)、粉末X射线衍射(XRD)、BET分别观测和测试了V2O5气凝胶材料的形貌、晶态、气凝胶比表面积、孔径分布.结果表明:常压干燥制备的V2O5气凝胶呈比较规则的纤维状纳米多孔结构,比表面积达138.9m2/g,平均孔径约为15nm,材料经300℃热处理后结晶.测试了V2O5气凝胶材料在不同电压下的交流阻抗谱(EIS),用等效电路进行了模拟,并对其动力学参数进行了分析和讨论.电化学测试表明,V2O5气凝胶首次放电容量为300.45mAh/g,可作为很好的锂离子电池阴极材料.
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