Microwave-assisted synthesis of spherical β-Ni(OH)2 superstructures for electrochemical capacitors with excellent cycling stability

Authors

Anjon Kumar Mondal, University of Technology, Sydney
Dawei Su, University of WollongongFollow
Shuangqiang Chen, University of Technology, Sydney
Jianqiang Zhang, University of Technology, Sydney
Alison Ung, University of Technology, SydneyFollow
Guoxiu Wang, University of Technology, SydneyFollow

RIS ID

92197

Publication Details

Mondal, A. Kumar., Su, D., Chen, S., Zhang, J., Ung, A. & Wang, G. (2014). Microwave-assisted synthesis of spherical β-Ni(OH)2 superstructures for electrochemical capacitors with excellent cycling stability. Chemical Physics Letters, 610-611 115-120.

Abstract

A novel single-step microwave-assisted process has been developed to synthesize spherical β-Ni(OH)2 superstructures without using any templates. Structure characterizations show that the spherical β-Ni(OH)2 composed of twisted nanosheets was obtained. The electrochemical properties of the as-prepared materials were evaluated by cyclic voltammetry and chronopotentiometry technology in 2 M KOH solution. Due to the unique morphology, the prepared β-Ni(OH)2 electrode displays a high specific capacitance of 2147 F g−1 at a discharge current of 1 A g−1 and outstanding cycling stability (99.5% capacitance retained after 2000 cycles), suggesting its potential application as an efficient electrode material for high-performance electrochemical capacitors.