Solvothermal synthesis of nano LiMn_0.9Fe_0.1PO₄: Reaction mechanism and electrochemical properties

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• 作者：Feipeng Ye ; Li Wang ; Xiangming He ; Mou Fang ; Zhongjia Dai ; Jixian Wang ; Chaochao Huang ; Fang Lian ; Jianlong Wang ; Guangyu Tian ; Minggao Ouyang
• 关键词：Feeding sequences ; Solvothermal synthesis ; Lithium manganese iron phosphate ; Lithium ion battery
• 刊名：Journal of Power Sources
• 出版年：1 May, 2014
• 年：2014
• 卷：253
• 期：Complete
• 页码：143-149
• 全文大小：1867 K

文摘

Solvothermal approach is used to synthesize LiMn_0.9Fe_0.1PO₄ (LMFP) nanomaterial for Li-ion batteries (LIBs). Experimental parameters such as feeding sequences, reaction time and reaction temperature are discussed and the obtained LMFP are characterized by XRD, SEM and TEM. To understand the formation of LMFP, a reaction mechanism is proposed. The proposed mechanism indicates that the suitable concentration of M_Li (M聽=聽Fe, Mn) antisite defect can improve the electrochemical performance of the material. The charge-discharge data of obtained LMFP shows that the LiMn_0.9Fe_0.1PO₄ material synthesized at 180聽掳C for 4聽h and then sintering with sucrose at 650聽掳C for 5聽h under argon protection has the highest discharge capacity, which is 149.2聽mAh聽g^鈭? at 0.1C rate.