Hierarchically Ordered Porous CoOOH Thin-Film Electrodes for High-Performance Supercapacitors

Dattatray S. Dhawale; Sehwan Kim; Dae Hwan Park; Jin Ho Choy; Salem S. Al-deyab; Katsuhiko Ariga; Eunkyoung Kim; Ajayan Vinu

doi:10.1002/celc.201402365

Hierarchically Ordered Porous CoOOH Thin-Film Electrodes for High-Performance Supercapacitors

Dattatray S. Dhawale, Sehwan Kim, Dae Hwan Park, Jin Ho Choy, Salem S. Al-deyab, Katsuhiko Ariga, Eunkyoung Kim, Ajayan Vinu

Department of Chemical and Biomolecular Engineering

Research output: Contribution to journal › Article › peer-review

28 Citations (Scopus)

Abstract

We report a simple, cost-effective, and potentially scalable approach for the fabricating hierarchically porous CoOOH thin-film supercapacitors by combining a soft-templating and a chemical-bath deposition (CBD) method. The prepared electrode materials exhibit uniform morphology and highly ordered macropores, achieving a maximum specific capacitance of 387Fg^-1 at a current density of 1mAcm^-2, with a high energy of 19Whkg^-1 and power density of 1713Wkg^-1. In addition, the porous CoOOH electrodes show good stability with a cycling efficiency >90% after 5000 charge-discharge cycles, which could lead to the generation of novel energy-storage devices with better efficiencies.

Original language	English
Pages (from-to)	497-502
Number of pages	6
Journal	ChemElectroChem
Volume	2
Issue number	4
DOIs	https://doi.org/10.1002/celc.201402365
Publication status	Published - 2015 Jan 8

All Science Journal Classification (ASJC) codes

Catalysis
Electrochemistry

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abstract = "We report a simple, cost-effective, and potentially scalable approach for the fabricating hierarchically porous CoOOH thin-film supercapacitors by combining a soft-templating and a chemical-bath deposition (CBD) method. The prepared electrode materials exhibit uniform morphology and highly ordered macropores, achieving a maximum specific capacitance of 387Fg-1 at a current density of 1mAcm-2, with a high energy of 19Whkg-1 and power density of 1713Wkg-1. In addition, the porous CoOOH electrodes show good stability with a cycling efficiency >90% after 5000 charge-discharge cycles, which could lead to the generation of novel energy-storage devices with better efficiencies.",

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AU - Dhawale, Dattatray S.

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AU - Choy, Jin Ho

AU - Al-deyab, Salem S.

AU - Ariga, Katsuhiko

AU - Kim, Eunkyoung

AU - Vinu, Ajayan

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