Arrays of Sealed Silicon Nanotubes As Anodes for Lithium Ion Batteries

被引：816

作者：

Song, Taeseup ^{[2
]}

Xia, Jianliang ^{[3
]}

Lee, Jin-Hyon ^{[2
]}

Lee, Dong Hyun ^{[2
]}

Kwon, Moon-Seok ^{[1
]}

Choi, Jae-Man ^{[1
]}

Wu, Jian ^{[3
]}

Doo, Seok Kwang ^{[1
]}

Chang, Hyuk ^{[1
]}

Park, Won Il ^{[2
]}

Zang, Dong Sik ^{[4
]}

Kim, Hansu ^{[1
]}

Huang, Yonggang ^{[5
,6
]}

Hwang, Keh-Chih ^{[7
]}

Rogers, John A. ^{[3
]}

Paik, Ungyu ^{[2
,8
]}

机构：

[1] Samsung Elect Co Ltd, Samsung Adv Inst Technol, Energy Lab, Suwon 440600, South Korea

[2] Hanyang Univ, Div Mat Sci Engn, Seoul 133791, South Korea

[3] Univ Illinois, Dept Mat Sci & Engn, Urbana, IL 61801 USA

[4] Samsung SDI Co Ltd, Corp Res & Dev Ctr, Yongin 449902, Kyeonggi Do, South Korea

[5] Northwestern Univ, Dept Civil & Environm Engn, Evanston, IL 60208 USA

[6] Northwestern Univ, Dept Mech Engn, Evanston, IL 60208 USA

[7] Tsinghua Univ, Dept Engn Mech, Beijing 100084, Peoples R China

[8] Hanyang Univ, WCU Dept Energy Engn, Seoul 133791, South Korea

来源：

NANO LETTERS | 2010年 / 10卷 / 05期

基金：

新加坡国家研究基金会;

关键词：

Lithium ion battery; silicon; nanotubes; anisotropic expansion; HIGH-CAPACITY; NEGATIVE ELECTRODE; SI ANODE; NANOWIRES; PERFORMANCE; INSERTION;

D O I：

10.1021/nl100086e

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Silicon is a promising candidate for electrodes in lithium ion batteries due to its large theoretical energy density. Poor capacity retention, caused by pulverization of Si during cycling, frustrates its practical application. We have developed a nanostructured form of silicon, consisting of arrays of sealed, tubular geometries that is capable of accommodating large volume changes associated with lithiation in battery applications. Such electrodes exhibit high initial Coulombic efficiencies (i.e., >85%) and stable capacity-retention (>80% after 50 cycles), due to an unusual, underlying mechanics that is dominated by free surfaces. This physics is manifested by a strongly anisotropic expansion in which 400% volumetric increases are accomplished with only relatively small (<35%) changes in the axial dimension. These experimental results and associated theoretical mechanics models demonstrate the extent to which nanoscale engineering of electrode geometry can be used to advantage in the design of rechargeable batteries with highly reversible capacity and long-term cycle stability.

引用

页码：1710 / 1716

页数：7

共 37 条

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