SnLi4.4 nanoparticles encapsulated in carbon matrix as high performance anode material for lithium-ion batteries
SnLi4.4 nanoparticles encapsulated in carbon matrix as high performance anode material for lithium-ion batteries
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封装在碳基体中的 SnLi4.4 纳米粒子作为高性能锂离子电池负极材料
DOI:
10.1016/j.nanoen.2014.07.020
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发表时间:
2014-10
期刊:
影响因子:
17.6
通讯作者:
Lixin Chen
中科院分区:
文献类型:
--
作者:
Xinhua Wang;Shouquan Li;Hongwei Ge;Lixin Chen
Induction melting associated with simple ball-milling is utilized to synthesize a SnLi4.4@C core–shell hierarchical composite in which nanometer-sized SnLi4.4particles are uniformly dispersed and encapsulated by carbon matrix. When evaluated as anode materials for lithium ion batteries, the composite exhibits a reversible capacity of 680 mA h g−1after 200 cycles at 200 mA g−1. A capacity of 310 mA h g−1is obtained even at a high rate of 5000 mA g−1. The superior electrochemical performance is ascribed to the fact that the prelithiated SnLi4.4will not exert any expansion stress on the carbon matrix during the subsequent delithiation and lithiation processes, therefore guarantee the sustainable integrity of the composite in the prolonged cycling. The carbon matrix offers continuous transport paths for Li+ions and electrons inside the composite. Meanwhile the carbon can sufficiently prevent the disintegration and aggregation of Sn nanoparticles upon prolonged cycling. The present study effectively circumvents the low initial Coulombic efficiency of the Sn-related nanocomposites and provides a protocol for pairing lithium-free cathodes to make the next-generation high energy lithium ion batteries.
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DOI:
10.1007/978-1-4614-4605-7
发表时间:
2013
期刊:
Nanotechnology for Lithium-Ion Batteries
影响因子:
--
作者:
Y. Abu-Lebdeh;I. Davidson
通讯作者:
Y. Abu-Lebdeh;I. Davidson
影响因子:
32.5
作者:
Wang, Dongniu;Yang, Jinli;Sun, Xueliang
通讯作者:
Sun, Xueliang
影响因子:
3.9
作者:
Courtney, IA;Dahn, JR
通讯作者:
Dahn, JR
影响因子:
3.7
作者:
Courtney, IA;Tse, JS;Dahn, JR
通讯作者:
Dahn, JR
影响因子:
9.2
作者:
M. Wachtler;J. Besenhard;M. Winter
通讯作者:
M. Wachtler;J. Besenhard;M. Winter