Building homogeneous nanostructure in Ni(OH) 2 /MWCNTs composite by electrostatic attraction

Micro & nano letters

article

Min Shi¹  Yanhong Li¹  Hongtao Cui¹ 

[1] College of Chemistry and Chemical Engineering, Yantai University

关键词: capacitance;    electrochemical electrodes;    nanocomposites;    self-assembly;    current density;    nanofabrication;    nickel compounds;    multi-wall carbon nanotubes;    electrostatic attraction;    multiwalled carbon nanotubes;    electrochemical measurement;    homogeneous nanostructure;    specific capacitance;    current density;    positively charged Ni(OH)2 monolayer nanosheets;    Ni(OH)2/MWCNTs composite;    electrical resistance;    Ni(OH)2-C;   

DOI  :  10.1049/mnl.2018.5469

学科分类：计算机科学（综合）

来源: Wiley

【 摘 要 】

A facile strategy for the preparation of composites with homogeneous distribution of multi-walled carbon nanotubes (MWCNTs) in Ni(OH) 2 was proposed. The electrostatic attraction between positively charged Ni(OH) 2 monolayer nanosheets and negatively charged MWCNTs was utilised to self-assemble the composites. The results of electrochemical measurement on the composite containing 30 wt% MWCNTs indicated that the homogeneous composition of MWCNTs in composite significantly reduced the electrical resistance and promoted the electrochemical utilisation of Ni(OH) 2 . As a result, the composite presented high electrochemical performance: having specific capacitance of 1568.8 F g −1 at low current density of 2.4 A g −1 and keeping a relatively high specific capacitance of 781.8 F g −1 at high current density of 81.7 A g −1 . Based on the results in this works, it is hoped that the adopted strategy could provide a promising idea for the preparation of composites with homogeneous distribution of individual components.

【 授权许可】

CC BY|CC BY-ND|CC BY-NC|CC BY-NC-ND