High capacity and excellent cycling stability of branched cobalt oxide nanowires as Li-insertion materials

被引：20

作者：

Li, Cheng Chao ^{[1
,2
]}

Yin, Xiao Ming ^{[1
]}

Chen, Li Bao ^{[1
]}

Li, Qiu Hong ^{[1
]}

Wang, Tai Hong ^{[1
]}

机构：

[1] Hunan Univ, Key Lab Micronano Optoelect Devices, Minist Educ, State Key Lab Chemo Biosensing & Chemometr, Changsha 410082, Hunan, Peoples R China

[2] Natl Univ Singapore, Dept Chem & Biomol Engn, Fac Engn, Singapore 119260, Singapore

来源：

APPLIED PHYSICS LETTERS | 2010年 / 97卷 / 04期

基金：

中国国家自然科学基金;

关键词：

cobalt compounds; current density; electrical conductivity; lithium; nanofabrication; nanowires; secondary cells; LITHIUM-ION BATTERIES; STORAGE; ELECTRODES; NANOTUBES; ANODES;

D O I：

10.1063/1.3469997

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

In this paper, the authors report the high-performance lithium storage properties of branched cobalt oxide nanowires synthesized through a topotactic conversion route. Compared with other nanosized materials, such branched nanostructures not only inherit the advantages of high surface-to-volume ratio and good dispersion but also show better electronic contact and conduction between nanobuilding units. Both features facilitate charge transport and insertion/extraction of Li ions and lead to higher capacity and better cycling stability compared with other transition metal oxide nanomaterials. Under the condition of high current density of 100 mA/g, the reversible capacity after 50 cycles is up to 1043 mAhg(-1) with an average fading rate of 0.15% per cycle. (C) 2010 American Institute of Physics. [doi: 10.1063/1.3469997]

引用

页数：3

共 24 条

[1] High capacity Li ion battery anodes using Ge nanowires [J].