Journal
CHEMSUSCHEM
Volume 9, Issue 9, Pages 1020-1026Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/cssc.201600024
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Funding
- Australian Research Council (ARC)
- CSIRO's OCE Science Leader Program
- Australian Postgraduate Award
- CSIRO's OCE Postdoctoral Fellowship Program
- Australian Postgraduate Award (APA)
- CSIRO's OCE top-up scholarship
- University of Sydney
- DECRA
- ARC
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Manganese oxides are promising pseudocapacitve materials for achieving both high power and energy densities in pseudo capacitors. However, it remains a great challenge to develop MnO2-based high-performance electrodes due to their low electrical conductance and poor stability. Here we show that MnO2 nanowires anchored on electrochemically modified graphite foil (EMGF) have a high areal capacitance of 167 mF cm(-2) at a discharge current density of 0.2 mA cm(-2) and a high capacitance retention after 5000 charge/discharge cycles (115%), which are among the best values reported for any MnO2-based hybrid structures. The EMGF support can also be recycled and the newly deposited MnO2-based hybrids retain similarly high performance. These results demonstrate the successful preparation of pseudocapacitors with high capacity and cycling stability, which may open a new opportunity towards a sustainable and environmentally friendly method of utilizing electrochemical energy storage devices.
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