Structure robustness and Li+ diffusion kinetics in amorphous and graphitized carbon based Sn/C composites for lithium-ion batteries
发布时间：2020-05-23
点击次数：
影响因子：3.218
DOI码：10.1016/j.jelechem.2019.113529
所属单位：Cent S Univ
发表刊物：J. Electroanal. Chem.
摘要：Reasonable selection of carbon-based buffer materials is of great importance to improve the lithium storage performance of alloy-based anode materials. In this work, two Sn/C nanocomposites with almost identical Sn/C ratio but different carbon structures, namely Sn/amorphous carbon (Sn/C-a) and Sn/graphitized carbon (Sn/C-g) multilayers, are prepared by a home-made tandem plasma reactor and are contrasted for their lithium storage performance. Lithiation/delithiation behaviors of the two samples are intensively studied by cyclic voltammery, galvanostatic intermittent titration technique and electrochemical impedance spectroscopy. The results imply that the multilayer Sn/C-a electrode exhibits better lithium ion diffusion kinetics than the Sn/C-g electrode during the initial few cycles. However, the Sn/C-g electrode possesses better structure robustness because of the good electric and mechanical properties of the graphitized carbon, which results in higher cyclic stability than the Sn/C-a electrode, featured for a high capacity of 898 mA h g(-1) after more than 500 cycles at a current density of 100 mA g(-1).
合写作者：Jie, Zheng, Ziyi, Wang, Zewei, Xie, Bingxue, Sun
第一作者：Xinghua, Chang
论文类型：期刊论文
通讯作者：Xingguo*, 邹理, Xinghua*, Chang
一级学科：0805 材料科学与工程
文献类型：J
是否译文：否
发表时间：2019-12-01