Ultralong H2V3O8 nanowire bundles as a promising cathode for lithium batteries

被引：39

作者：

An, Qinyou ^{[1
]}

Sheng, Jinzhi ^{[1
]}

Xu, Xu ^{[1
]}

Wei, Qiulong ^{[1
]}

Zhu, Yaqin ^{[2
]}

Han, Chunhua ^{[1
]}

Niu, Chaojiang ^{[1
]}

Mai, Liqiang ^{[1
]}

机构：

[1] Wuhan Univ Technol, WUT Harvard Joint Nano Key Lab, State Key Lab Adv Technol Mat Synth & Proc, Wuhan 430070, Peoples R China

[2] Chinese Acad Sci, Shanghai Inst Ceram, Shanghai 200050, Peoples R China

来源：

NEW JOURNAL OF CHEMISTRY | 2014年 / 38卷 / 05期

基金：

中国国家自然科学基金;

关键词：

HIGH-PERFORMANCE; ION BATTERIES; VANADIUM-OXIDES; HYDROTHERMAL SYNTHESIS; NANOBELTS; V3O7-CENTER-DOT-H2O; TRANSPORT; OXIDATION; TEMPLATE; CAPACITY;

D O I：

10.1039/c3nj01134h

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Ultralong H2V3O8 nanowire bundles with length up to hundreds of micrometers were successfully synthesized by a facile hydrothermal approach. The nanowire bundles exhibit a high specific discharge capacity of 325.7 mA h g(-1) at 50 mA g(-1). While the current density is up to 2000 mA g(-1), the initial specific discharge capacities of a H2V3O8 nanowires cathode can reach 121.1 mA h g(-1) with a capacity fading of only 0.0425% per cycle for 300 cycles. Electrical transport of a single nanowire is also recorded in situ to detect the evolution of the nanowire during annealing. The conductivity of H2V3O8 nanowire has an increase of three orders of magnitude compared to that of the dehydrated nanowire. The excellent electrochemical performance of H2V3O8 nanowire bundles results from high conductivity and good structural stability. This work demonstrates that H2V3O8 nanowire bundles are a promising cathode material for lithium batteries.

引用

页码：2075 / 2080

页数：6

共 45 条

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