Citation: LUO Di-Di, TIAN Jian-Hua, ZHU Xi, WANG Zhao-Dong, SHAN Zhong-Qiang. Effect of Carbon and Graphene on Performance of LiMnPO₄ Material[J]. Chinese Journal of Inorganic Chemistry, ;2017, 33(6): 1000-1006. doi: 10.11862/CJIC.2017.129 shu

Effect of Carbon and Graphene on Performance of LiMnPO₄ Material

School of Chemical Engineering and Technology, Tianjin University, Tianjin 300350, China

Corresponding author: SHAN Zhong-Qiang, shanzq@tju.edu.cn
Received Date: 26 December 2016
Revised Date: 10 March 2017

Figures(6)

LiMnPO₄ was synthesized by solvothermal method. LiMnPO₄/carbon/graphene composites with different amount of pyrolytic carbon and graphene were prepared using sucrose and graphene as carbon sources. The effect of pyrolytic carbon and graphene on the performance of material was investigated. The morphology of the material was characterized by scanning electron microscope (SEM) and transmission electron microscope (TEM). Pyrolytic carbon coating can enhance the surface electronic conductivity of LiMnPO₄ nanoplates, which plays a major role in improving the performances of the material. Graphene can enhance the electronic and ionic conductivity between nanoplates, and then improve the electrochemical properties of the material. Electrochemical measurements indicate that LiMnPO₄ electrode with 4% pyrolytic carbon and 2% graphene exhibits better electrochemical performances. The specific capacity is 139.1 mAh·g^-1 at 0.5C and the capacity retention is 93.6% after 100 cycles. Compared with single carbon and single graphene LiMnPO₄ electrode, the specific capacity at 0.5C of LMP-C(4)-G(2) electrode is increased by 35.0% and 48.6%.
- lithium manganese phosphate,
- carbon coating,
- graphene,
- electrochemical performance
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Effect of Carbon and Graphene on Performance of LiMnPO₄ Material