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학술지 Washing을 통한 상분리 변화에 따른 그래핀 산화물의 분산도 조절 및 슈퍼커패시터의 특성에 관한 연구
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저자
설지환, 유인규, 강석훈, 김빛나, 김인규
발행일
201802
출처
전기전자재료학회논문지, v.31 no.2, pp.102-106
ISSN
1226-7945
출판사
한국전기전자재료학회
DOI
https://dx.doi.org/10.4313/JKEM.2018.31.2.102
초록
Recently, there has been an increasing interest in the use of graphene as electrode materials for supercapacitors.In this regard, graphene oxide (GO) films were prepared using GO slurry obtained by dispersing GO powder indeionized (DI) water. The degree of dispersion of GO powder in DI water depends on the concentration of GO slurry,pH, impurity content, GO particle size, types of functional groups contained in GO, and manufacturing method of GOpowder. In this study, the dispersivity of the GO powder was improved by adjusting the pH using only DI water(without additives), and a uniform GO film was obtained. The GO film was reduced by exposure to xenon intense pulsedlight for a few milliseconds, and the reduced GO film was used as electrodes of a supercapacitor. The supercapacitorwas characterized using cyclic voltammetry (CV), charge-discharge cycle, and electrochemical impedance spectroscopymeasurements, and the specific capacitance of the supercapacitor was found to be ~140 F/g from the CV data.
KSP 제안 키워드
Charge/discharge cycles, Cyclic voltammetry, Degree of dispersion, Functional group, Graphene oxide(GOS), Impurity content, Manufacturing method, Specific capacitance, electrochemical impedance, electrode materials, particle size