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Hierarchically Ordered Porous CoOOH Thin‐Film Electrodes for High‐Performance Supercapacitors
Author(s) -
Dhawale Dattatray S.,
Kim Sehwan,
Park DaeHwan,
Choy JinHo,
Aldeyab Salem S.,
Ariga Katsuhiko,
Kim Eunkyoung,
Vinu Ajayan
Publication year - 2015
Publication title -
chemelectrochem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.182
H-Index - 59
ISSN - 2196-0216
DOI - 10.1002/celc.201402365
Subject(s) - supercapacitor , materials science , capacitance , electrode , macropore , porosity , chemical bath deposition , current density , power density , thin film , nanotechnology , energy storage , deposition (geology) , optoelectronics , composite material , power (physics) , mesoporous material , chemistry , catalysis , paleontology , biochemistry , physics , quantum mechanics , sediment , biology
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 387 F g −1 at a current density of 1 mA cm −2 , with a high energy of 19 Wh kg −1 and power density of 1713 W kg −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.