Vapor-induced solid-liquid-solid process for silicon-based nanowire growth

被引：16

作者：

Zhang, Ji-Guang ^{[1
]}

Liu, Jun ^{[1
]}

Wang, Donghai ^{[1
]}

Choi, Daiwon ^{[1
]}

Fifield, Leonard S. ^{[1
]}

Wang, Chongmin ^{[1
]}

Xia, Gordon ^{[1
]}

Nie, Zimin ^{[1
]}

Yang, Zhenguo ^{[1
]}

Pederson, Larry R. ^{[2
]}

Graff, Gordon ^{[1
]}

机构：

[1] Pacific NW Natl Lab, Richland, WA 99354 USA

[2] N Dakota State Univ, Fargo, ND 58102 USA

来源：

JOURNAL OF POWER SOURCES | 2010年 / 195卷 / 06期

关键词：

Lithium ion batteries; Silicon; Nanowire; Energy storage; SiC; PHEV; ANODES;

D O I：

10.1016/j.jpowsour.2009.09.068

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Silicon-based nanowires have been grown from commercial silicon powders Under conditions with different oxygen and carbon activities. Nanowires grown in the presence of carbon sources consisted of a crystalline SiC core with an amorphous SiOx shell. The thickness of the SiOx shell decreased as the oxygen concentration in the precursor gases decreased. Nanowires grown in a carbon-free environment consisted of amorphous silicon oxide with a typical composition of SiO1 8. The growth rate of nanowires decreased with decreasing oxygen content in the precursor gases. SiO1 8 nanowires exhibited an Initial discharge capacity of similar to 1300 mAhg(-1) and better stability than those of silicon powders A vapor-induced solid-liquid-solid (VI-SI-S) mechanism is proposed to explain the nanowire growth (Including silicon and other metal-based nanowires) from powder Sources In this approach, both a gas source and a solid-powder source are required for nanowire growth This mechanism is consistent with experimental observations and also can be used to guide the design and growth of other nanowires Published by Elsevier B V

引用

页码：1691 / 1697

页数：7

共 11 条

[1] High-performance lithium battery anodes using silicon nanowires [J].