采用X射线衍射和电化学方法,研究了正极材料Li3 Ni0.1V19(PO4)3的结构和电化学性能.结果表明:Li3 Ni0.1V1.9(PO4)3具有单斜晶系结构.在室温下,以0.1C倍率放电时Li3Ni0.1V1.9(PO4)3的初始比容量为115mAh/g,从0.1C增加到0.4C经过60次循环后,比容量保持率为97.3%,而未掺杂镍的Li3V2(PO4)3,初始比容量为129 mAh/g,60次循环后,比容量保持率仅为69.7%.循环伏安和交流阻抗测试表明,Li3 Ni0.3V1.9(PO4)3有较低的极化电阻和较好的可逆性.
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