Preparation of mesoporous NiO with a bimodal pore size distribution and application in electrochemical capacitors

被引：157

作者：

Wang, Dengchao ^{[1
]}

Ni, Wenbin ^{[1
]}

Pang, Huan ^{[1
]}

Lu, Qingyi ^{[1
]}

Huang, Zhongjie ^{[1
]}

Zhao, Jianwei ^{[1
]}

机构：

[1] Nanjing Univ, Sch Chem & Chem Engn, Key Lab Analyt Chem Life Sci MOE, Nanjing 210008, Peoples R China

来源：

ELECTROCHIMICA ACTA | 2010年 / 55卷 / 22期

基金：

中国国家自然科学基金;

关键词：

Nickel oxide; Mesoporous; Bimodal pore size distribution; Metal-organic coordination precursor; Electrochemical capacitors; NICKEL-OXIDE; ACTIVATED CARBONS; PERFORMANCE; MANGANESE; ELECTRODE;

D O I：

10.1016/j.electacta.2010.05.084

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

Mesoporous nickel oxide with a porous structure exhibiting a bimodal pore size distribution (2.6 and 30.3 nm diameter pores) has been synthesized in this paper. Firstly, a mesoporous precursor of coordination complex Ni-3(btc)(2)center dot 12H(2)O (btc = 1,3,5-benzenrtricarboxylic acid) is synthesized based on the metal-organic coordination mechanism by a hydrothermal method. Then mesoporous NiO with a bimodal size distribution is obtained by calcining the precursor in the air, and characterized by transmission electron microscopy and N-2 adsorption measurements. Such unique multiple porous structure indicates a promising application of the obtained NiO as electrode materials for supercapacitors. The electrochemical behavior has been investigated by cyclic voltammogram, electrochemical impedance spectra and chronopotentiometry in 3 wt.% KOH aqueous electrolyte. The results reveal that the prepared NiO has high-capacitance retention at high scan rate and exhibits excellent cycle-life stability due to its special mesoporous character with bimodal size distribution. (c) 2010 Elsevier Ltd. All rights reserved.

引用

页码：6830 / 6835

页数：6

共 33 条

[21] Proton and electron conductivity in hydrous ruthenium oxides evaluated by electrochemical impedance spectroscopy: The origin of large capacitance [J].