Journal
CERAMICS INTERNATIONAL
Volume 42, Issue 13, Pages 14963-14969Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.ceramint.2016.06.140
Keywords
Spinel; NiMn2O4; Nanosheet arrays; Supercapacitors
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Funding
- National Natural Science Foundation of China [51302328]
- Fundamental Research Funds for the Central Universities [106112015CDJXY130006]
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Nanostructured spinel NiMn2O4 arrays have been fabricated by a facile hydrothermal approach and further investigated as binder-free electrode for high-performance supercapacitors. Compared with Mn3O4, NiMn2O4 exhibited higher specific capacitances (662.5 F g(-1) and 370.5 F g(-1) in different electrolytes at the current density of 1 A g(-1)) and excellent cycling stability (similar to 96% capacitance retention after 1000 cycles) in a three-electrode system. Such a novel microstructure grown directly on the conductive substrate provided sufficient active sites for redox reaction resulting in their enhanced electrochemical behaviors. Their improved performances suggested that ultrathin sheet-like NiMn2O4 arrays on Ni foam substrate were a promising electrode material for supercapacitors. (C) 2016 Elsevier Ltd and Techna Group S.r.l. All rights reserved.
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