Nano-Sn/hard carbon composite anode material with high-initial coulombic efficiency

被引：121

作者：

Guo, Bingkun ^{[1
]}

Shu, Jie ^{[1
]}

Tang, Kun ^{[1
]}

Bai, Ying ^{[1
]}

Wang, Zhaoxiang ^{[1
]}

Chen, Liquan ^{[1
]}

机构：

[1] Chinese Acad Sci, Inst Phys, Lab Solid State Ion, Beijing 100080, Peoples R China

来源：

JOURNAL OF POWER SOURCES | 2008年 / 177卷 / 01期

基金：

中国国家自然科学基金;

关键词：

hard carbon spherule; composite; lithium ion battery; high-initial coulombic efficiency;

D O I：

10.1016/j.jpowsour.2007.11.003

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Nanoscaled tin (Sn) particles were embedded in the mesopores of hard carbon spherules (HCS) to form a composite anode material for lithium ion batteries. The structure of the obtained composite was characterized by X-ray diffraction (XRD) and the electrochemical performances were evaluated by galvanostatic cycling and cyclic voltammetry. It is found that embedding Sn nanoparticles into HCS not only results in a composite material with high-lithium storage capacity and capacity retention, but also increases the initial coulombic efficiency of the composite. Based on the infrared spectroscopic analysis, the enhanced initial coulombic efficiency is attributed to the nano-tin-induced decomposition of the ROCO2Li. species in the solid electrolyte interphase (SEI) layer. (c) 2007 Elsevier B.V. All rights reserved.

引用

页码：205 / 210

页数：6

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