Synthesis of high-performance LiMnPO4/C /rGO composite via a mechanical-activation-assisted polyol process

被引：0
作者：
Jianguo Duan
Guorong Hu
Yanbing Cao
Ke Du
Zhongdong Peng
机构：
[1] Central South University,School of Metallurgy and Environment
来源：
Ionics | 2016年 / 22卷
关键词：
Li-ion batteries; Coatings; Nanostructures; Electrochemical properties;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
A mechanical-activation-assisted polyol method for efficient preparation of high-performance rod-like LiMnPO4 composite is developed. The nanosized [Mn3(PO4)2·8H2O + Li3PO4]/graphene oxide (GO) precursors are prepared via a mechano-chemical liquid-phase activation–assisted technique from LiH2PO4 and manganese powder. LiMnPO4/reduced graphene oxide (rGO) samples are obtained by polyol process in boiling triethylene glycol (TEG) and then followed with pyrolytic carbon coating to prepare the LiMnPO4/C/rGo nanocomposite. The characterized results prove that well-crystallized LiMnPO4 nanorods can be successfully synthesized by polyol processing. The LiMnPO4 nanorods have a large percentage of highly oriented (020) facets, which provide a high pore density for Li-ion insertion/extraction. Both rGO modification and further carbon coating significantly improve the conductivity and reduce the charge-transfer resistance. The optimized LiMnPO4/C/rGO composite delivers good electrochemical performance.
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页码：1541 / 1549
页数：8
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