Nano-architectured Co(OH)2 electrodes constructed using an easily-manipulated electrochemical protocol for high-performance energy storage applications

Jeng Kuei Chang, Chih Ming Wu, I-Wen Sun

Research output: Contribution to journalArticlepeer-review

195 Citations (Scopus)

Abstract

A simple, low-cost, and efficient electrochemical strategy, which includes the co-deposition of a Ni-Cu layer, selective etching of Cu from the film (leaving nano-porous Ni), and electrodeposition of Co(OH)2 nano-whiskers on the obtained Ni substrate, is used to construct a nano-structured electrode. This process can be conducted on many conductive surfaces, which can be cheap, flexible, and wearable, and can be integrated into advanced mobile micro-power systems. Due to its unique nano-architecture, the prepared Co(OH)2 electrode shows exceptional energy storage performance as compared to that of the conventional version of the electrode. The optimum specific capacitance obtained in this study, evaluated using cyclic voltammetry (CV), was as high as 2800 F/g. When the CV scan rate was increased from 5 to 200 mV/s, only a 4% decay in the capacitance was found, indicating excellent high-power capability. These characteristics make the nano-structured Co(OH)2 electrode a promising candidate for supercapacitor applications.

Original languageEnglish
Pages (from-to)3729-3735
Number of pages7
JournalJournal of Materials Chemistry
Volume20
Issue number18
DOIs
Publication statusPublished - 2010 May 10

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Materials Chemistry

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