Fabrication of Mn/Mn oxide core–shell electrodes with three-dimensionally ordered macroporous structures for high-capacitance supercapacitors

Three-dimensionally ordered macroporous (3DOM) metallic Mn films have been prepared with ordered polystyrene (PS) templates on electrodeposition from an ionic liquid (IL). A 3DOM Mn core-Mn oxide shell film was prepared on anodizing a 3DOM Mn film in KCl aqueous solution. The varied anodization cour...

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Bibliographic Details
Published in:Energy & environmental science 2013-07, Vol.6 (7), p.2178-2185
Main Authors: Deng, Ming-Jay, Ho, Pei-Jung, Song, Cheng-Zhao, Chen, Shin-An, Lee, Jyh-Fu, Chen, Jin-Ming, Lu, Kueih-Tzu
Format: Article
Language:English
Subjects:
Anodizing
Capacitors
Electrodes
Manganese
Oxides
Polystyrene resins
Shells
Supercapacitors
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Summary:Three-dimensionally ordered macroporous (3DOM) metallic Mn films have been prepared with ordered polystyrene (PS) templates on electrodeposition from an ionic liquid (IL). A 3DOM Mn core-Mn oxide shell film was prepared on anodizing a 3DOM Mn film in KCl aqueous solution. The varied anodization courses were confirmed to cause variations of the material characteristics of the prepared 3DOM Mn/Mn oxide electrodes and thereby in their pseudocapacitive performance. The 3DOM Mn/Mn oxide electrodes anodized with the cyclic voltammetric method showed the most promising specific capacitance, 1200 plus or minus 60 F g super(-1) (based on the mass of 3DOM Mn/Mn oxides), with a satisfactory rate capability and cycling performance. Such electrodes can be potentially applied for lithium batteries and supercapacitors.
ISSN:1754-5692
1754-5706
DOI:10.1039/c3ee40598b