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학술지 Supercapacitive Properties of Activated Carbon Electrode in Potassium-Polyacrylate Hydrogel Electrolytes
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저자
김광만, 이영기, 신동옥, 고장면
발행일
201605
출처
Journal of Applied Electrochemistry, v.46 no.5, pp.567-573
ISSN
0021-891X
출판사
Springer
DOI
https://dx.doi.org/10.1007/s10800-016-0927-3
협약과제
15PB4600, 중대형 전고체 리튬이차전지용 유무기 하이브리드 고체전해질, 이영기
초록
Abstract: To enhance the electrochemical performance, a conventional activated carbon supercapacitor is modified by adopting potassium-polyacrylate (PAAK) electrolyte additive on a glass fiber separator and by fabricating the activated carbon electrode on nickel foam instead of on conventional nickel foil as a current collector. The glass fiber separator plays the role of self-supporting PAAK-KOH hydrogel electrolyte with superior ionic conductivity. Moreover, the adoption of nickel foam strengthens the close contact between the active material and the current collector, reducing the interfacial resistance between electrode and electrolyte. As a result, the combination of glass fiber separator and nickel foam substrate can contribute to a great increase in the specific capacitance, to a value of over 200혻F혻g?닋1, and to an enhancement of the high-rate capability of activated carbon supercapacitors. Graphical abstract: [Figure not available: see fulltext.]
키워드
Glass fiber separator, Hydrogel electrolyte, Nickel foam substrate, Potassium-polyacrylate, Supercapacitor
KSP 제안 키워드
Activated carbon(AC), Activated carbon electrode, Active materials, Close contact, Electrochemical performance, Graphical abstract, Hydrogel electrolyte, Nickel foam(NF), Nickel foam substrate, Nickel foil, Self-supporting