期刊
SMALL
卷 16, 期 35, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/smll.202002489
关键词
mesoporous films; mesoporous Ru; Ru oxide; supramolecular templates; supercapacitors
类别
资金
- Australian Government Research Training Program Scholarship
- Australian Research Council Discovery Project [DP190102944]
- Lions Medical Research Foundation [018918]
- National Health and Medical Research Council -Medical Research Future Fund [1199984]
- Fondo Nacional de Desarrollo Cientifico y Tecnologico [FONDECYT 1170809]
The electrochemical synthesis of mesoporous ruthenium (Ru) films using sacrificial self-assembled block polymer micelles templates, and its electrochemical surface oxidation to RuO(x)is described. Unlike standard methods such as thermal oxidation, the electrochemical oxidation method described here retains the mesoporous structure. Ru oxide materials serve as high-performance supercapacitor electrodes due to their excellent pseudocapacitive behavior. The mesoporous architectured film shows superior specific capacitance (467 F g(Ru)(-1)) versus a nonporous Ru/RuO(x)electrode (28 F g(Ru)(-1)) that is prepared via the same method but omitting the pore-directing polymer. Ultrahigh surface area materials will play an essential role in increasing the capacitance of this class of energy storage devices because the pseudocapacitive redox reaction occurs on the surface of electrodes.
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