Citation: XIA Zong-Mei, HU Fang-Dong, HU Yu-Qing, ZHAO Meng, ZHANG Xue-Mei, JIANG Xiao-Lei. Sol-gel Synthesis of LiTi_2-xMn_x(PO₄)₃@C Composite Nanoparticles as a Superior Cathode Material for Lithium-Ion Batteries[J]. Chinese Journal of Inorganic Chemistry, ;2020, 36(4): 620-626. doi: 10.11862/CJIC.2020.083 shu

Sol-gel Synthesis of LiTi_2-xMn_x(PO₄)₃@C Composite Nanoparticles as a Superior Cathode Material for Lithium-Ion Batteries

School of Chemistry and Chemical Engineering, Linyi University, Linyi, Shandong 276005, China

Corresponding author: JIANG Xiao-Lei, jiangxiaolei@lyu.edu.cn
Received Date: 11 June 2019
Revised Date: 8 January 2020

Figures(7)

A Nasicon-type LiTi_2-xMn_x(PO₄)₃@C (x=0.02, 0.05, 0.08 and 0.1) has been successfully synthesized by a simple sol-gel method. The precipitates were annealed at 700℃ for 10 h in Ar. The metallic ion doping could increase their lattice parameters, along with the large available tunnels for Li⁺ diffusion, and then decrease the electrochemical resistance. The carbon layer plays an important role in improving the electronic conductivity. These composites were characterized via powder X-ray diffractometry with Cu Kα line as a radiation (λ=0.154 18 nm). The morphologies were observed by a transmission electron microscopy. The molar ratio of n_Mn:n_Ti was obtained from ICP-AES analysis. Among the samples, LiTi_1.92Mn_0.08(PO₄)₃@C exhibited the best electrochemical performance as a cathode material for lithium ion batteries, with a discharge capacity of 145 mAh·g^-1 after 150 cycles at 0.1 C. It even delivered a discharge capacity of 132 mAh·g^-1 in the first cycle at 5 C. This superior electrochemical property could be ascribed to its enhanced lithium-diffusion induced by doping and improved electronic conductivity induced by carbon coating.
- doping,
- carbon coating,
- sol-gel method,
- cathode material,
- electrochemical performance
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Sol-gel Synthesis of LiTi2-xMnx(PO4)3@C Composite Nanoparticles as a Superior Cathode Material for Lithium-Ion Batteries

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通讯作者: 陈斌, bchen63@163.com

Sol-gel Synthesis of LiTi_2-xMn_x(PO₄)₃@C Composite Nanoparticles as a Superior Cathode Material for Lithium-Ion Batteries