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스테인리스강 기판에 연속 이온 층 흡착 및 반응 (SILAR) 공정을 통한 CoS 코팅 및 슈퍼캐패시터 전극 특성
김재승(Jaeseung Kim),이재원(Jaewon Lee),Vijay Shamrao Kumbhar,최진섭(Jinsub Choi),이기영(Kiyoung Lee) 한국표면공학회 2019 한국표면공학회지 Vol.52 No.3
In this study, the cobalt sulfide (CoS) nanosheet on stainless steel as a supercapacitor electrode is synthesized by using a facile successive ionic layer adsorption reaction (SILAR) method. The number of cycles for dipping and rinsing can control the nanosheet thickness of CoS on stainless steel. Field emission-scanning electron microscopy (FE-SEM) showed a layer structure of CoS particles coupled as agglomeration. And x-ray diffraction (XRD) showed the crystallinity of the CoS nanosheet. To investigate the characteristics of the CoS nanosheet electrode as the supercapacitor, analysis of electrochemical measurement was conducted. Finally, the CoS nanosheet of 70cycles on stainless steel shows the specific capacitance (44.25 mF/cm² at 0.25 mA/cm²) with electrochemical stability of 78.5% over during 2000cycles.
Wet chemical synthesis of WO3 thin films for supercapacitor application
Nanasaheb Madhukar Shinde,Ajay Dattu Jagadale,Vijay Shamrao Kumbhar,Tanka Raj Rana,김준호,Chandrakant Dnyandev Lokhande 한국화학공학회 2015 Korean Journal of Chemical Engineering Vol.32 No.5
Tungstic oxide (WO3) thin films have been synthesized by wet chemical method, i.e., successive ionic layer adsorption and reaction (SILAR) method. These films are characterized using X-ray diffraction (XRD), scanning electron microscopy (SEM) and optical absorption techniques. The XRD pattern revealed the formation of polycrystalline WO3 films. Scanning electron micrographs demonstrate the three-dimensional aggregated irregular extended rod shaped morphology of WO3 thin films. The WO3 film showed a direct band gap of 2.5 eV. The WO3 film exhibited specific capacitance of 266 F·g−1 in 1M Na2SO4 electrolyte at the scan rate of 10mVs−1.