Selective Ultrathin Carbon Sheath on Porous Silicon Nanowires: Materials for Extremely High Energy Density Planar Micro-Supercapacitors

被引：100

作者：

Alper, John P. ^{[1
]}

Wang, Shuang ^{[1
,2
]}

Rossi, Francesca ^{[3
]}

Salviati, Giancarlo ^{[3
]}

Yiu, Nicholas ^{[1
]}

Carraro, Carlo ^{[1
]}

Maboudian, Roya ^{[1
]}

机构：

[1] Univ Calif Berkeley, Dept Chem & Biomol Engn, Berkeley, CA 94720 USA

[2] Jilin Univ, Coll Chem, Alan G MacDiarmid Inst, Changchun 130012, Peoples R China

[3] IMEM CNR Inst, I-43124 Parma, Italy

来源：

NANO LETTERS | 2014年 / 14卷 / 04期

基金：

美国国家科学基金会;

关键词：

Porous silicon nanowire; microsupercapacitor; carbon coating; ionic liquid; ELECTROCHEMICAL CAPACITOR; FUEL-CELLS; ELECTRODES; GRAPHENE; FILMS; OXIDE;

D O I：

10.1021/nl404609a

中图分类号：

O6 [化学];

学科分类号：

070301 [无机化学];

摘要：

Microsupercapacitors are attractive energy storage devices for integration with autonomous microsensor networks due to their high-power capabilities and robust cycle lifetimes. Here, we demonstrate porous silicon nanowires synthesized via a lithography compatible low-temperature wet etch and encapsulated in an ultrathin graphitic carbon sheath, as electrochemical double layer capacitor electrodes. Specific capacitance values reaching 325 mF cm(-2) are achieved, representing the highest specific ECDL capacitance for planar microsupercapacitor electrode materials to date.

引用

页码：1843 / 1847

页数：5

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