Maximum Li storage in Si nanowires for the high capacity three-dimensional Li-ion battery

被引：165

作者：

Kang, Kibum ^{[1
]}

Lee, Hyun-Seung ^{[1
]}

Han, Dong-Wook ^{[2
]}

Kim, Gil-Sung ^{[1
]}

Lee, Donghun ^{[1
]}

Lee, Geunhee ^{[1
]}

Kang, Yong-Mook ^{[2
]}

Jo, Moon-Ho ^{[1
,3
]}

机构：

[1] Pohang Univ Sci & Technol, Dept Mat Sci & Engn, Pohang 790784, South Korea

[2] Kongju Natl Univ, Div Adv Mat Engn, Cheonan 330717, South Korea

[3] Pohang Univ Sci & Technol, Div Adv Mat Sci, Pohang 790784, South Korea

来源：

APPLIED PHYSICS LETTERS | 2010年 / 96卷 / 05期

关键词：

energy storage; fuel cells; lithium compounds; nanowires; secondary cells; RECHARGEABLE LITHIUM BATTERIES; NANOSTRUCTURED SILICON; ANODES; INSERTION;

D O I：

10.1063/1.3299006

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Nanowires can serve as three-dimensional platforms at the nanometer scale for highly efficient chemical energy storage and conversion vehicles, such as fuel cells and secondary batteries. Here we report a coin-type Si nanowire (NW) half-cell Li-ion battery showing the Li capacity of approximately 4000 mAh/g, which nearly approaches the theoretical limit of 4200 mAh/g, with very high Coulombic efficiency of up to 98%. Concomitantly, we provide direct evidence of reversible phase transitions in the Si NW anodes at the full electrochemical cycles, varying from pure Si to Li(22)Si(5) phase, which has been known empirically inaccessible in the bulk limit.

引用

页数：3

共 26 条

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