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以LiVOPO_4、蔗糖为原料,采用溶液沉积-热解法制备了LiVOPO_4/C复合材料。采用热重与差热分析、X-射线衍射分析、扫描电镜分析以及电化学测试等手段对LiVOPO_4/C的微观结构、表面形貌和电化学性能进行了研究.结果表明:蔗糖热分解后在LiVOPO_4颗粒的表面包覆形成了一层多孔碳;多孔碳可以有效阻止LiVOPO_4颗粒的聚集,增加电极的导电面积,降低电池极化,改善LiVOPO_4的电化学性能;与LiVOPO_4粉末相比,LiVOPO_4/C具有更高的可逆容量、更稳定的循环性能.
LiVOPO_4 / C composites were prepared by solution deposition-pyrolysis method using LiVOPO_4 and sucrose as raw materials. The microstructure, surface morphology and electrochemical performance of LiVOPO_4 / C were studied by means of TG-DTA, X-ray diffraction analysis, SEM and electrochemical measurements.The results showed that the thermal decomposition of LiVOPO_4 / Porous carbon can effectively prevent the aggregation of LiVOPO_4 particles, increase the conductive area of the electrode, reduce the polarization of the battery and improve the electrochemical performance of LiVOPO_4. Compared with LiVOPO_4 powder, LiVOPO_4 / C With higher reversible capacity, more stable cycle performance.