Asymmetric metal oxide pseudocapacitors advanced by three-dimensional nanoporous metal electrodes

被引：73

作者：

Chen, L. Y. ^{[1
]}

Hou, Y. ^{[1
]}

Kang, J. L. ^{[1
]}

Hirata, A. ^{[1
]}

Chen, M. W. ^{[1
,2
,3
]}

机构：

[1] Tohoku Univ, WPI Adv Inst Mat Res, Sendai, Miyagi 9808577, Japan

[2] Japan Sci & Technol Agcy JST, CREST, Kawaguchi, Saitama 3320012, Japan

[3] Shanghai Jiao Tong Univ, Sch Mat Sci & Engn, State Key Lab Met Matrix Composites, Shanghai 200030, Peoples R China

来源：

JOURNAL OF MATERIALS CHEMISTRY A | 2014年 / 2卷 / 22期

关键词：

ELECTROCHEMICAL ENERGY-STORAGE; X-RAY PHOTOELECTRON; IONIC-LIQUID; HIGH-POWER; SUPERCAPACITORS; TRANSITION; DENSITY; CAPACITORS; FILMS;

D O I：

10.1039/c4ta00965g

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：

We report a novel RuO2-NPG//Co(OH)(2)-NPG asymmetric supercapacitor with a high specific capacitance and a wide potential window in which bifunctional nanoporous gold is used as both the highly conductive supports of the pseudocapacitive oxides and the 3D current collectors in the device. The RuO2-NPG and Co(OH)(2)-NPG electrodes can reach specific capacitances of 1300 F g(-1) and 1800 F g(-1), respectively, which provide comparatively high specific capacitances in relation to metal oxide/carbon electrodes, giving rise to an asymmetric oxide pseudocapacitor with a large capacitance of similar to 350 F g(-1), high working voltage of 1.6 V and an ultrahigh energy density of similar to 120 W h kg(-1).

引用

页码：8448 / 8455

页数：8

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