Silicon Nanowire Fabric as a Lithium Ion Battery Electrode Material

被引：257

作者：

Chockla, Aaron M. ^{[1
]}

Harris, Justin T. ^{[1
]}

Akhavan, Vahid A. ^{[1
]}

Bogart, Timothy D. ^{[1
]}

Holmberg, Vincent C. ^{[1
]}

Steinhagen, Chet ^{[1
]}

Mullins, C. Buddie ^{[1
,2
]}

Stevenson, Keith J. ^{[2
]}

Korgel, Brian A. ^{[1
]}

机构：

[1] Univ Texas Austin, Dept Chem Engn, Texas Mat Inst, Ctr Nano & Mol Sci & Technol, Austin, TX 78712 USA

[2] Univ Texas Austin, Dept Chem & Biochem, Texas Mat Inst, Ctr Nano & Mol Sci & Technol, Austin, TX 78712 USA

来源：

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY | 2011年 / 133卷 / 51期

基金：

美国国家科学基金会;

关键词：

ROOM-TEMPERATURE; SFLS SYNTHESIS; RAMAN-SPECTRA; ANODES; CARBON; NANOCRYSTALS; KINETICS; SI; NANOCOMPOSITES; PASSIVATION;

D O I：

10.1021/ja208232h

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

A nonwoven fabric with paperlike qualities composed of silicon nanowires is reported. The nanowires, made by the super-critical-fluid-liquid-solid process, are crystalline, range in diameter from 10 to 50 nm with an average length of > 100 mu m, and are coated with a thin chemisorbed polyphenylsilane shell. About 90% of the nanowire fabric volume is void space. Thermal annealing of the nanowire fabric in a reducing environment converts the polyphenylsilane coating to a carbonaceous layer that significantly increases the electrical conductivity of the material. This makes the nanowire fabric useful as a self-supporting, mechanically flexible, high-energy-storage anode material in a lithium ion battery. Anode capacities of more than 800 mA h g(-1) were achieved without the addition of conductive carbon or binder.

引用

页码：20914 / 20921

页数：8

共 52 条

[1] Building better batteries [J].