Nano-sized cathode material LiMn0.5Fe0.5PO4/C synthesized via improved sol-gel routine and its magnetic and electrochemical properties

Authors

Liying Liu, University of Wollongong
Guiyuan Chen, Guangdong University of Technology
Bingtian Du, Guangdong University of Technology
Yanyan Cui, Guangdong University of TechnologyFollow
Xi Ke, Guangdong University of Technology
Jun Liu, Guangdong University of Technology
Zaiping Guo, University of WollongongFollow
Zhicong Shi, Guangdong University of Technology
Haiyan Zhang, Guangdong University of Technology
Shulei Chou, University of WollongongFollow

RIS ID

116702

Publication Details

Liu, L., Chen, G., Du, B., Cui, Y., Ke, X., Liu, J., Guo, Z., Shi, Z., Zhang, H. & Chou, S. (2017). Nano-sized cathode material LiMn0.5Fe0.5PO4/C synthesized via improved sol-gel routine and its magnetic and electrochemical properties. Electrochimica Acta, 255 205-211.

Abstract

Cathode materials LiMn 0.5 Fe 0.5 PO 4 /C and LiMnPO 4 /C were synthesized by a high-energy ball-milling assisted sol-gel method. The LiMn 0.5 Fe 0.5 PO 4 consists of nanorods and nanoparticles homogeneously wrapped with highly ordering carbon. The increased Néel-temperature and decreased effective magnetic moment of LiMn 0.5 Fe 0.5 PO 4 /C revealed the microstructure differences from LiMnPO 4 /C. Meanwhile, tiny amount of ferromagnetic impurities is detected in LiMn 0.5 Fe 0.5 PO 4 /C by magnetic tests. The synergetic effects of Fe substitution and carbon coating remarkably improve rate capacity and cyclic stability of LiMn 0.5 Fe 0.5 PO 4 /C. This solid solution delivers initial discharge capacities of 128.6 mAh g −1 and 116.3 mAh g −1 and capacity retentions of 93.5% and 90.3% after 100 cycles at 1C and 2C respectively, significantly better than LiMnPO 4 /C.