Journal
ELECTROCHIMICA ACTA
Volume 136, Issue -, Pages 189-194Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2014.05.074
Keywords
Porous MnO2 film; Electrodeposition; High mass loading; Supercapacitor; Electrochemical performance
Categories
Funding
- National Natural Science Foundation of China (NSFC) [21173049]
- Research Fund for the Doctoral Program of Higher Education of China (RFDP) [20133514110002]
- Key Laboratory of Novel Thin Film Solar Cells, CAS
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Nanostructured porous MnO2 film on Ni foam substrate was fabricated via a CV electrodeposited route for the first time. The obtained MnO2 film had a 3D network structure and a high mass loading from 6 to 18 mg cm(-2). This material achieved a maximum specific capacitance of 2790 mF cm(-2) at 2 mA cm(-2) and 864 mF cm(-2) at 20 mA cm(-2), and the specific capacitance can be retained above 90% after 1000 cycles at 5 mA cm(-2). The fabricated AC//MnO2 asymmetric supercapacitor can reach a specific capacitance of 67 F g(-1) and an energy density of 37.22 Wh Kg(-1) with its capacitance retention of 80% after 1000 cycles at 2.5 mA cm(-2). (C) 2014 Elsevier Ltd. All rights reserved.
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