| Autor: |
Wang, Shiwen, Wang, Fang, Wang, Peiyuan, Han, Lifeng, Wu, Shide, Chen, Yaqing, Guo, Dongjie |
| Předmět: |
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| Zdroj: |
Nanotechnology; 11/20/2020, Vol. 31 Issue 47, p1-10, 10p |
| Abstrakt: |
A 3D porous graphene composite film containing Ni/NiO hybrid nanoparticles (Ni/NiO NPs) is prepared by combining electrophoresis deposition and thermal H2 annealing techniques. The Ni/NiO NPs with a mean diameter of 45 nm are uniformly embedded on both the exterior and interior surfaces of reduced graphene, forming a 3D porous reduced graphene oxide composite film (Ni/NiO rGO). The insertion of Ni/NiO NPs into rGO greatly improves the electric conductivity and charge storage capability of the resultant Ni/NiO rGO film. By directly using it as freestanding electrodes, the fabricated lithium-ion battery and supercapacitor respectively exhibited high capacities of 758 mAh g−1@ 0.2 A g−1 and 430.8 F g−1@0.5 A g−1, an increase of 82.3-fold and 20.2-fold compared to the pure rGO electrode-based counterparts under the same condition. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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