期刊
APPLIED SURFACE SCIENCE
卷 565, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.apsusc.2021.150512
关键词
2D heterostructure; Electrochromic energy storage; Areal capacitance; Optical contrast
类别
资金
- National Key Research & Development Program [2016YFB0303903, 2016YFE0201600]
- Foundation of Equipment Development Department [6220914010901]
By designing a 2D rGO/NiO heterostructure film, the active surface area of the NiO film was increased, improving its electrochromic and supercapacitor performance.
Two-dimensional (2D) transition metal oxide composited with graphene has attracted worldwide attention in the energy storage and conversation field. Here, a 2D rGO/NiO heterostructure film on ITO glass was designed and applied to electrochromic energy storage. The 2D heterostructure increases the interlayer spacing of the NiObased films and the electrochemically active surface area, reduces the charge transfer resistance and band gap, and then realizes fast ion diffusion and electron transport, thus improving the electrochromic and supercapacitor performance of the NiO film. The film exhibits outstanding areal capacitance (269 mF cm-2 at current density of 0.5 mA cm-2), excellent cyclic stability (capacitance retention almost 100% after 1000 cycles at current density of 1.5 mA cm-2) and superior electrochromic performance (high optical contrast of 53% at 630 nm, fast response time of 3.4 s for coloration and 5.3 s for bleaching). Furthermore, integrated the 2D heterostructure rGO/NiO film into a smart electrochromic-supercapacitor device, two devices could light up an electronic watch for about 2 h, at the same time, the color of the device changes in the process of electric output.
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