水热法制备LiMn_(0.15)Fe_(0.85)PO_4/C及其性能研究

Preparation of LiMn_(0.15)Fe_(0.85)PO_4/C by Hydrothermal Method and Its Performance

采用二乙二醇(DEG)辅助的水热法制备了LiMn_(0.15)Fe_(0.85)PO_4/C复合材料,并通过XRD、SEM和电化学测试等研究了混合溶剂中水/DEG摩尔比、水热反应时间和煅烧时间等对其结构、形貌和电化学性能的影响。实验结果表明,当水/DEG摩尔比X=3、水热反应时间t=24 h、煅烧时间t’=3 h时所制备的LiMn_(0.15)Fe_(0.85) PO_4/C复合材料颗粒粒径分布均匀,电化学性能最佳。

LiMn0.15Fe0.85PO4/C composite was prepared by DEG-assisted hydrothermal method, and the effect of the molar ratio of water and DEG, the hydrothermal time and the calcination time on the morphology and the electrochemical performance of LiMn0.15Fe0.85PO4/C composite was studied by XRD, SEM and charge-discharge test. The results show that the LiMn0.15Fe0.85PO4/C composite prepared under the molar ratio of 3,the hydrothermal time of 24 h and the calcination time of 3 h,has the best electrochemical performance.