Flexible Free-Standing VO2(B) Nanobelt Films as Additive-Free Cathode for Lithium-Ion Batteries

被引：30

作者：

Huang, Jijiang ^{[1
]}

Wang, Xiaofei ^{[1
]}

Liu, Junfeng ^{[1
]}

Sun, Xiaoming ^{[1
]}

Wang, Li ^{[2
]}

He, Xiangming ^{[2
]}

机构：

[1] Beijing Univ Chem Technol, State Key Lab Chem Resource Engn, Beijing 100029, Peoples R China

[2] Tsinghua Univ, Inst Nucl & New Energy Technol, Beijing 100084, Peoples R China

来源：

INTERNATIONAL JOURNAL OF ELECTROCHEMICAL SCIENCE | 2011年 / 6卷 / 05期

基金：

北京市自然科学基金;

关键词：

Nanobelts; vanadium dioxide; lithium-ion batteries; additive-free; free-standing; HYDROTHERMAL SYNTHESIS;

D O I：

10.1016/S1452-3981(23)15104-2

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

Flexible free-standing VO2(B) nanobelt films were designed as additive-free cathode for lithium ion batteries, via self-assembly of VO2(B) nanobelts with a filtration technology. VO2(B) nanobelts with different size were prepared by hydrothermal reaction with various amount of formic acid addition. The phase structure and morphology were analyzed by X-ray diffraction and scanning electron microscopy, which revealed high crystallinity and homogeneous morphology. A constant current charge-discharge test was employed to investigate the electrochemical properties. These films exhibited initial specific capacity of 219.4 mAh/g at current density of 10mA/g in the voltage range 4.0-1.5V vs. Li+/Li. Distinct voltage plateaus around 2.5V were observed, which was seldom reported. The size effect of the materials on electrochemical performance was investigated and the results demonstrated that the electrochemical performance of the VO2(B) nanobelts is significantly impacted by their size.

引用

页码：1709 / 1719

页数：11

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