Lithium storage in carbon-coated SnO2 by conversion reaction

被引：154

作者：

Guo, X. W. ^{[1
,3
]}

Fang, X. P. ^{[1
]}

Sun, Y. ^{[1
]}

Shen, L. Y. ^{[1
]}

Wang, Z. X. ^{[1
]}

Chen, L. Q. ^{[1
,2
]}

机构：

[1] Chinese Acad Sci, Key Lab Renewable Energy, Key Lab New Energy Mat & Devices, Beijing Natl Lab Condense Matter Phys,Inst Phys, Beijing 100190, Peoples R China

[2] Chonnam Natl Univ, Sch Mat Sci & Engn, Kwangju 500757, South Korea

[3] Tohoku Univ, WPI Adv Inst Mat Res, Sendai, Miyagi 9808577, Japan

来源：

JOURNAL OF POWER SOURCES | 2013年 / 226卷

关键词：

Hollow microspheres; Carbon coated tin oxide; Lithium ion battery; Raman characterization; Electrochemical conversion reaction; X-RAY-DIFFRACTION; ION BATTERIES; ANODE MATERIAL; SNO2-CARBON COMPOSITES; HOLLOW SPHERES; FILMS; OXIDE; OXIDATION;

D O I：

10.1016/j.jpowsour.2012.10.068

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：

SnO2 attracts considerable interest as a promising high-capacity anode material for lithium ion batteries. It is believed that SnO2 stores lithium by the alloying and de-alloying reactions after the initial irreversible reduction from SnO2 to Li2O and metallic Sn. Here we report that a reversible conversion reaction, similar to that often observed in transition metal oxides, can occur in the cycling of the carbon-coated SnO2 hollow microspheres (SnO2/C), as is evidenced by Raman spectroscopy, high-resolution transmission electron microscopy (HRTEM) and theoretical calculations. However, only alloying and de-alloying reactions can reversibly take place in carbon-free SnO2 hollow microspheres. The reversible capacity of the SnO2/C is even higher than the theoretical capacity of the free SnO2. These findings provide guidance to designing anode materials with higher reversible capacities. (C) 2012 Elsevier B.V. All rights reserved.

引用

页码：75 / 81

页数：7

共 26 条

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