硅酸盐学报

水热法制备Al/Co共掺杂VO2(B)正极材料及其电化学性能

作者：杨倩邹正光吴星宇张艳娇李圣宇

单位：(桂林理工大学材料科学与工程学院有色金属及材料加工新技术教育部重点实验室桂林 541000)

分类号：TQ152

出版年,卷(期):页码：2019,47(11):0-0

DOI：

摘要：

采用水热法，以V2O5、C12H22O11、Co(NO3)2•6H2O、Al(NO3)3•9H2O为原料，分别合成了纯相VO2(B)和Al/Co共掺杂VO2(B)。X射线衍射分析结果显示，掺杂后样品的衍射峰强度变低、峰形变宽、结晶性下降。扫描电子显微镜照片显示，掺杂后样品的形貌发生明显变化，由长棒状(纯相)变为短棒状与片状均匀混合的形貌。电化学性能测试结果显示首次放电比容量和循环性能都大幅度提高。样品A1(摩尔比n(Al):n(Co):n(V)=12:6:100)首次放电比容量为301 mA?h/g，比未掺杂样品(216 mA?h/g)高85 mA?h/g；样品A2(摩尔比n(Al):n(Co):n(V)=12:12:100)首次放电比容量为285 mA?h/g，比未掺杂样品高69 mA?h/g，并且掺杂样品经过100次充放电循环后容量保持率都比未掺杂样品高。

基金项目：

国家科学基金项目(51562006)

作者简介：

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