PVP-assisted solvothermal synthesis of LiMn0.8Fe0.2PO4/C nanorods as cathode material for lithium ion batteries

• Published in: Ceramics international Vol. 42; no. 7; pp. 9018 - 9024
• Main Authors: Xiong, Junwei, Wang, Yuanzhong, Wang, Yingying, Zhang, Jianxin
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 15.05.2016
• Subjects: Electrochemical performance; Lithium ion battery; Lithium iron manganese phosphate; Rectangular prism nanorods; Solvothermal; Lithium iron manganese phosphate; Electrochemical performance; Lithium ion battery; Solvothermal; Rectangular prism nanorods
• ISSN: 0272-8842; 1873-3956
• DOI: 10.1016/j.ceramint.2016.02.156

LiMn0.8Fe0.2PO4/C rectangular prism nanorods with a short b-axis are successfully synthesized via solvothermal method by means of the in-situ polymerization of resorcinol–formaldehyde followed with further annealing process. In this process, PVP has significant effect on the nanorod morphology. Physicochemical characterizations and electrochemical measurements results demonstrate that the short b-axis of nanorod can contribute to shortening the lithium ion diffusion distance. Relatively thin and uniform carbon layers can improve the electronic conductivity. Furthermore, LiMn0.8Fe0.2PO4/C nanorod delivers a reversible discharge capacity of 140mAhg−1 at 0.1C, and remarkable rate capability is exhibited with 78.6% capacity retention at a 4C rate. Meanwhile, it shows stable cycling stability and capacity retention of 98.1% is still maintained after 100 cycles at 1C. The excellent electrochemical properties can be attributed to the structure superiority of nanorod.