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COMPOSITES BASED ON REDUCED GRAPHENE OXIDE AND NICKEL HYDROXIDE AS A PROMISING MATERIAL FOR HYBRID SUPERCAPACITORS
Abstract
Using microwave irradiation reduced graphene oxide (RGO) and nickel hydroxide as precursors the composites (Ni-RGO) of variable composition were prepared in two ways : by precipitation of Ni(OH)2 on RGO in situ, and mixing the suspensions RGO and Ni(OH)2. It was established that the Ni-RGO composites have a high specific capacity when tested as a super-capacitor electrode in 1M KOH (150 to 330 F/g). It was shown that RGO has high stability during cycling mode of the charge-discharge capacity but a low (~ 25 F/g). Pure Ni(OH)2, on the contrary, has a high specific capacity in the range of 450-500 F/g, but lack the stability during cycling. Capacitive and stability galvanostatic tests of composites Ni-RGO take intermediate values compared with their components, depending on the percentage of Ni(OH)2. The introduction of RGO enhanced the resistance of electrode mass during cycling during the first 100 charge/discharge cycles. Thus, RGO can serve as a stabilizing additive which increase the life and the range of the operating current of super-capacitors based on Ni(OH)2.
About the Authors
S. A. Baskakov
Federal State Budget Scientific Agency Institute of Problems of Chemical Physics RAS
Russian Federation
Russian Federation
Y. V. Baskakova
Institute of Materials Science. IM Frantsevich NAS
Russian Federation
Russian Federation
A. D. Zolotarenko
Federal State Budget Scientific Agency Institute of Problems of Chemical Physics RAS
Russian Federation
Russian Federation
Y. M. Shulga
Federal State Budget Scientific Agency Institute of Problems of Chemical Physics RAS
Russian Federation
Russian Federation
O. N. Efimov
Federal State Budget Scientific Agency Institute of Problems of Chemical Physics RAS
Russian Federation
Russian Federation
A. L. Gusev
LLC "Scientific and Technical Center" TATA ""
Russian Federation
Russian Federation
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Review
For citations:
Baskakov S.A., Baskakova Y.V., Zolotarenko A.D., Shulga Y.M., Efimov O.N., Gusev A.L. COMPOSITES BASED ON REDUCED GRAPHENE OXIDE AND NICKEL HYDROXIDE AS A PROMISING MATERIAL FOR HYBRID SUPERCAPACITORS. Alternative Energy and Ecology (ISJAEE). 2014;(2):146-156. (In Russ.)
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