MWCNTs/metal (Ni, Co, Fe) oxide nanocomposite as potential material for supercapacitors application in acidic and neutral media

被引：22

作者：

Adekunle, Abolanle S. ^{[1
,2
,3
]}

Ozoemena, Kenneth I. ^{[3
,4
]}

Agboola, Bolade O. ^{[5
]}

机构：

[1] Univ Johannesburg, Dept Chem Technol, ZA-2028 Doornfontein, South Africa

[2] Obafemi Awolowo Univ, Dept Chem, Ife, Nigeria

[3] Univ Pretoria, Dept Chem, ZA-0002 Pretoria, South Africa

[4] Council Sci & Ind Res CSIR, Energy Mat, Pretoria, South Africa

[5] Amer Univ Nigeria, Dept Petr Chem & Engn, Yola, Nigeria

来源：

JOURNAL OF SOLID STATE ELECTROCHEMISTRY | 2013年 / 17卷 / 05期

基金：

新加坡国家研究基金会;

关键词：

MWCNT-metal oxide nanocomposite; Electrochemical impedance; Galvanostatic charge-discharge; Specific capacitance; CARBON NANOTUBES; ELECTROCHEMICAL PROPERTIES; NICKEL; NANOPARTICLES; ELECTRODES; METAL; HYDRAZINE; BEHAVIOR; STORAGE;

D O I：

10.1007/s10008-012-1978-y

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

Supercapacitive properties of synthesised metal oxides nanoparticles (MO where M = Ni, Co, Fe) integrated with multi-wall carbon nanotubes (MWCNT) on basal plane pyrolytic graphite electrode (BPPGE) were investigated. Successful modification of the electrode with the MWCNT-MO nanocomposite was confirmed with spectroscopic and microscopic techniques. Supercapacitive properties of the modified electrodes in sulphuric acid (H2SO4) and sodium sulphate (Na2SO4) electrolytes were investigated using cyclic voltammetry, electrochemical impedance spectroscopy and galvanostatic constant current charge-discharge (CD) techniques. The specific capacitance values followed similar trend with that of the cyclic voltammetry and the electrochemical impedance experiments and are slightly lower than values obtained using the galvanostatic charge-discharge cycling. MWCNT-NiO-based electrode gave best specific capacitance of 433.8 mF cm(-2) (ca 2,119 Fg(-1)) in H2SO4. The electrode exhibited high electrochemical reproducibility with no significant changes over 1,000 cyclic voltammetry cycles.

引用

页码：1311 / 1320

页数：10

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