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Free-standing porous Manganese dioxide/graphene composite films for high performance supercapacitors.
- Source :
-
Journal of Colloid & Interface Science . Jan2015, Vol. 437, p304-310. 7p. - Publication Year :
- 2015
-
Abstract
- A simple hard template method and hydrothermal process have been employed to fabricate a self-standing hierarchical porous MnO 2 /graphene film. Thus-constructed electrode materials for binder-free supercapacitors exhibit a high specific capacitance of 266.3 F g −1 at the density of 0.2 A g −1 . Moreover, the two-electrode device demonstrates an excellent rate capability and cycling stability with capacitance retention of 85.1% after 2000 charge–discharge cycles at a current density of 1 A g −1 . The porous nanostructured design can effectively improve the specific surface areas and account for the shorter relaxation time for the electrodes, resulting in a high electrochemical performance. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 00219797
- Volume :
- 437
- Database :
- Academic Search Index
- Journal :
- Journal of Colloid & Interface Science
- Publication Type :
- Academic Journal
- Accession number :
- 99211598
- Full Text :
- https://doi.org/10.1016/j.jcis.2014.08.060