Electrochemical properties of SnO2/carbon composite materials as anode material for lithium-ion batteries

被引：39

作者：

Wang, Jie ^{[1
]}

Zhao, Hailei ^{[1
,2
]}

Liu, Xiaotong ^{[1
]}

Wang, Jing ^{[1
]}

Wang, Chunmei ^{[1
]}

机构：

[1] Univ Sci & Technol Beijing, Sch Mat Sci & Engn, Beijing 100083, Peoples R China

[2] Beijing Key Lab New Energy Mat & Technol, Beijing 100083, Peoples R China

来源：

ELECTROCHIMICA ACTA | 2011年 / 56卷 / 18期

关键词：

SnO2; Anode materials; Electrochemical property; Lithium-ion batteries; ONE-POT SYNTHESIS; FACILE SYNTHESIS; FT-IR; STORAGE; TIN; OXIDE; NANOPARTICLES; MICROSPHERES; PERFORMANCE; CONVERSION;

D O I：

10.1016/j.electacta.2011.04.134

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

SnO2/carbon composite anode materials were synthesized from SnCl4 center dot 5H(2)O and sucrose via a hydrothermal route and a post heat-treatment. The synthesized spherical SnO2/carbon powders show a cauliflower-like micro-sized structure. High annealing temperature results in partial reduction of SnO2. Metallic Sn starts to emerge at 500 degrees C. High Sn content in SnO2/carbon composite is favorable for the increase of initial coulombic efficiency but not for the cycling stability. The SnO2/carbon annealed at 500 degrees C exhibits high specific capacity (similar to 400 mAh g(-1)), stable cycling performance and good rate capability. The generation of Li2O in the first lithiation process can prevent the aggregation of active Sn, while the carbon component can buffer the big volume change caused by lithiation/delithiation of active Sn. Both of them make contribution to the better cycle stability. (C) 2011 Elsevier Ltd. All rights reserved.

引用

页码：6441 / 6447

页数：7

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