Self-assembled synthesis of hierarchically porous NiO film and its application for electrochemical capacitors

被引：165

作者：

Zhang, Y. Q.

Xia, X. H.

Tu, J. P. ^{[1
]}

Mai, Y. J.

Shi, S. J.

Wang, X. L.

Gu, C. D.

机构：

[1] Zhejiang Univ, State Key Lab Silicon Mat, Hangzhou 310027, Zhejiang, Peoples R China

来源：

JOURNAL OF POWER SOURCES | 2012年 / 199卷

基金：

中国博士后科学基金;

关键词：

Nickel oxide; Electrochemical capacitor; Porous film; NANOSTRUCTURED MANGANESE-DIOXIDE; NICKEL-OXIDE FILM; ELECTRODE MATERIALS; FABRICATION; DEPOSITION; NANOTUBES; ARRAYS; CARBON; ANODE; RUO2;

D O I：

10.1016/j.jpowsour.2011.10.065

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：

A hierarchically porous NiO film on nickel foam substrate is prepared by a facile ammonia-evaporation method. The self-assembled film possesses a structure consisting of NiO triangular prisms and randomly porous NiO nanoflakes. The pseudocapacitive behaviors of the porous NiO film are investigated by cyclic voltammograms and galvanostatic charge-discharge tests in 1 M KOH. The hierarchically porous NiO film exhibits a high discharge capacitance and excellent rate capability with 232 F g(-1), 229 F g(-1), 213 F g(-1) and 200 F g(-1) at 2, 4, 10, and 20 A g(-1), respectively. The specific capacitance of 87% is maintained from 2 A g(-1) to 20 A g(-1). The porous NiO film also shows rather good cycling stability and exhibits a specific capacitance of 348 F g(-1) after 4000 cycles. (C) 2011 Elsevier B.V. All rights reserved.

引用

页码：413 / 417

页数：5

共 36 条

[11] Facile approach to prepare loose-packed NiO nano-flakes materials for supercapacitors [J].