Korean Institute of Surface Engineering

pISSN : 1225-8024 | eISSN : 3399-8403

공학

한국표면공학회지 (52권3호 130-137)

A Facile synthesis of CoS by Successive Ionic Layer Adsorption and Reaction (SILAR) Process for Supercapacitors

스테인리스강 기판에 연속 이온 층 흡착 및 반응 (SILAR) 공정을 통한 CoS 코팅 및 슈퍼캐패시터 전극 특성

김재승;이재원;;최진섭;이기영;
Kim, Jaeseung;Lee, Jaewon;Kumbhar, Vijay S.;Choi, Jinsub;Lee, Kiyoung;

인하대학교 화학 및 화학공학 융합학과;경북대학교 환경과학기술연구소;
Department of Chemistry and Chemical Engineering, Inha University;Research Institute of Environmental Science & Technology, Kyungpook National University;

DOI : 10.5695/JKISE.2019.52.3.130

Abstract

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 ($44.25mF/cm^2$ at $0.25mA/cm^2$) with electrochemical stability of 78.5% over during 2000cycles.

Keywords

Cobalt sulfide (CoS);Supercapacitor;Successive ionic layer adsorption and reaction (SILAR);