期刊
JOURNAL OF ENERGY STORAGE
卷 35, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.est.2021.102295
关键词
Ni(OH())2; RGO; Nanoflakes; Orientation; Electrochemical performance; Supercapacitors
资金
- Key Research and Development Project of Sichuan Province, China [2017GZ0396]
- Fundamental Research Funds for Central Universities
Different orientations of multilayered Ni(OH)(2) nanoflakes anchored on reduced graphene oxide (rGO) sheets were prepared by a facile chemical deposition method. The vertically oriented Ni(OH)(2)/rGO composite exhibited higher specific capacitance compared to the horizontally oriented counterpart, with exceptional rate capability and cycling stability. Overall, this orientation-controlled Ni(OH)(2)/rGO composite shows promise as an electrode material for energy storage systems.
Different orientations of multilayered Ni(OH)(2) nanoflakes uniformly anchored on reduced graphene oxide (rGO) sheets are prepared by a facile chemical deposition method. It is found that vertically oriented Ni(OH)(2)/rGO has a greater specific capacitance than the horizontally oriented counterpart. The electrochemical performance of as-fabricated vertically oriented Ni(OH)(2)/rGO composite as cathode material for supercapacitors shows an unexceptionable specific capacitance along with high rate capability and cycling stability. As a result, the specific capacitance reaches 1770 F/g at a current density of 1 A/g in 6 M KOH solution. Furthermore, the Ni(OH)(2)/rGO electrode displays an ultrahigh rate capability (maintaining 864 F/g at a high current density of 50 A/g) and a super cycling stability (142.2% capacity retention after 3000 charge-discharge cycles). Such an orientation-controlled Ni(OH)(2)/rGO composite is thus a promising electrode material for great applications in energy storage systems.
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