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NiO Nanocrystalline/Reduced Graphene Oxide Composite Film with Enhanced Electrochromic Properties
Fengpei Lang,Jingbing Liu,Hao Wang,Hui Yan 성균관대학교(자연과학캠퍼스) 성균나노과학기술원 2017 NANO Vol.12 No.5
The NiO nanocrystalline/reduced graphene oxide (rGO) composite film was successfully synthesized using a simple hot-injection and dip coating method. The as-prepared samples were characterized using X-ray diffraction (XRD), Raman, scanning electron microscope (SEM), ultraviolet and visible spectrophotometer (UV). Compared to the NiO film, the NiO nanocrystalline/rGO composite film exhibits enhanced electrochromic properties and large ΔT (40.7% at 550 nm), fast switching speed (tc = 4.3 s and tb = 3.9 s), high coloration efficiency (12.85 cm2 C -1) and better cycling performance (1000 cycles). The improvement of the electrochromic properties was attributed to the large specific surface area and good conductivity of the rGO.