期刊
JOURNAL OF ALLOYS AND COMPOUNDS
卷 969, 期 -, 页码 -出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2023.172283
关键词
Vanadium pentoxide; Nickel oxide; Nano-arrays; Composite structure; Supercapacitor
V2O5 nanobelt arrays were fabricated on Ni foam using a hydrothermal route, and NiO nanosheet arrays were then grown on VNBAs using a chemical bath deposition approach to form VNBAs/NNSAs composite. The composite showed excellent electrochemical performance with high specific capacity, cycling stability, and rapid ion diffusivity.
V2O5 nanobelt arrays (VNBAs) is fabricated on Ni foam by using an easy hydrothermal route and then NiO nanosheet arrays (NNSAs) is grown on VNBAs by using a simple chemical bath deposition approach to form VNBAs/NNSAs composite. It is found that the monocrystalline VNBAs with a lamellar structure is uniformly distributed on nickel foam and the polystalline NNSAs with a close packed structure is closely covered on the VNBAs. CV, GCD, EIS and CA electrochemical techniques are used to test the supercapacitive properties of the VNBAs/NNSAs composite. The single electrode displays a high specific capacity of 875 F g-1, a good cycling stability of 96.1%, a small charge transfer resistance of 1.32 omega and a rapid ion diffusivity of 2.5 x 10-8 cm2 s- 1. The symmetric supercapacitor combined by the VNBAs/NNSAs displays a large energy density of 120.1 W h kg-1 at 400 W kg-1 and it retains 68.3 W h kg-1 at 8000 W kg-1. The VNBAs/NNSAs composite with high electro chemical performance is a potential supercapacitor electrode material.
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