SnO2 hollow nanospheres assembled by single layer nanocrystals as anode material for high performance Li ion batteries

被引:22
|
作者
Wei, Wei [1 ,3 ]
Song, Ling-Xiao [2 ]
Guo, Lin [3 ]
机构
[1] Shangqiu Normal Univ, Sch Chem & Chem Engn, Shangqiu 476000, Peoples R China
[2] Zhengzhou Univ, Coll Chem & Mol Engn, Zhengzhou 450001, Peoples R China
[3] Beijing Univ Aeronaut & Astronaut, Sch Chem & Environm, Beijing 100191, Peoples R China
基金
中国国家自然科学基金;
关键词
SnO2; Hollow nanospheres; Single layer; Li ion batteries; LITHIUM STORAGE PROPERTIES; MESOPOROUS SILICA; CATHODE MATERIAL; MICROSPHERES; COMPOSITE; NANOTUBE; SPHERES;
D O I
10.1016/j.cclet.2014.09.023
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
SnO2 hollow nanospheres were successfully synthesized via a facile one-step solvothermal method. Characterizations show that the as-prepared SnO2 spheres are of hollow structure with a diameter at around 50 nm, and especially, the shell of the spheres is assembled by single layer SnO2 nanocrystals. The surface area of the material reaches up to 202.5 m(2)/g. As an anode material for Li ion batteries, the sample exhibited improved electrochemical performance compared with commercial SnO2 particles. After cycled at high current rate of 0.5 C, 1 C and 0.5 C for 20 cycles, respectively, the electrode can maintain a capacity of 509 mAh/g. The suitable shell thickness/diameter ratio endows the good structural stability of the material during cycling, which promises the excellent cycling performance of the electrode. The large surface area and the ultra thin shell ensure the high rate performance of the material. (C) 2014 Lin Guo. Published by Elsevier B.V. on behalf of Chinese Chemical Society and Institute of Materia Medica, Chinese Academy of Medical Sciences. All rights reserved.
引用
收藏
页码:124 / 128
页数:5
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