期刊
JOURNAL OF COLLOID AND INTERFACE SCIENCE
卷 440, 期 -, 页码 211-218出版社
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jcis.2014.11.008
关键词
Nickel cobaltite; Reduced graphene oxide; Nanosheet; Synthesis; Supercapacitors
资金
- National Nature Science Foundation of China [51272094]
- Specialized Research Fund for the Doctoral Program of Higher Education of China [20123227110018]
- China Postdoctoral Science Foundation [2012150439]
A composite with porous NiCo2O4 nanosheets attached on reduced graphene oxide (RGO) sheets is synthesized through a facile solution-based method combined with a simple thermal annealing process. The capacitive performances of the as-prepared NiCo2O4/RGO (NCG) composites as electrode materials are investigated. It is found that the NCG composites exhibit a high specific capacitance up to 1186.3 F g(-1) at the current density of 0.5 A g(-1), and superior cycling stability with about 97% of the initial capacitance after 100 cycles. The greatly,enhanced capacitive performance of the NCG electrode can be attributed to the existence of RGO support, which serves as both conductive channels and active interface. The approach used in the synthesis provides a facile route for preparing graphene-binary metal oxide electrode materials. The remarkable capacitive performance of NCG composites will undoubtedly make them be attractive for high performance energy storage applications. (C) 2014 Elsevier Inc. All rights reserved.
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