Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 6, Issue 2, Pages 1106-1112Publisher
AMER CHEMICAL SOC
DOI: 10.1021/am404691w
Keywords
NiO; 3D derived graphene; supercapacitor; binder free; scaffold; nanoflake
Funding
- Foundation on the Creative Research Team Construction Promotion Project of Beijing Municipal Institutions
- Annual Rain Training Support Project of Beijing University of Technology
- Doctoral Fund of Innovation of Beijing University of Technology
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A new type of three-dimensional (3D) NiO/ultrathin derived graphene (UDG) hybrid on commercial Ni foam (NF) for a binder-free pseudocapacitor electrode is presented. NiO nanoflakes are in situ grown by a chemical bath deposition (CBD) technique on the free-standing 3D UDG/NF scaffold, which is first prepared by a simple nanocasting process consisting of hydrothermal reaction and subsequent thermal transformation. The 3D UDG/NF scaffold with interconnected network affords a high conductivity due to the high graphitization degree and efficiently facilitates the electron transport to NiO. Moreover, the 3D NiO/UDG/NF hybrid allows for a thinner 3D active material layer under the same loading density, which could shorten the diffusion paths of ions. The NiO/UDG/NF hybrid is directly used as a binder-free supercapacitor electrode, which exhibited significantly improved supercapacitor performance compared to the bare CBD prepared NiO/NF electrode.
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