119th General Meeting of the KCS

Type Poster Presentation
Area 재료화학
Room No. 포스터발표장
Time 4월 21일 (금요일) 13:00~14:30
Code MAT.P-361
Subject Nitrogen-doped mesoporous graphene with controlled pore sizes for high-performance supercapacitors
Authors 이지혜, 정 현*
동국대학교 화학과, Korea
Abstract Nitrogen-doped mesoporous graphene (NMG) with interpenetrating porous network was successfully synthesized and their pore size was tuned by controlling the volume ratio of washing solvent. As-prepared NMG was synthesized by hydrothermal process of graphite oxide (GO), self-assembled amphiphilic triblock copolymer (Pluronic P123), and ammonium hydroxide, wherein P123 and ammonium hydroxide was used as soft-template and nitrogen source, respectively. And then, as-prepared NMG was washed with the various volume ratios of water to ethanol. Finally, the obtained products were sintered under Ar atmosphere. The synthesized NMGs have high BET specific surface area (941 – 1198 m2/g) and narrow mesopore size distribution. Furthermore, average mesopore size of NMG can be rationally controlled by regulating the volume ratio of water to ethanol. With the increase of ethanol ratio, the average mesopore size is decreased to be from ~11.2 nm to ~4.4 nm. In order to determine supercapacitor capacitance, cyclic voltammetry curves and galvanostatic charge-discharge tests were performed in a three-electrode system in 6 M KOH. In addition, supercapacitor capacitance of NMGs had been compared with mesoporous graphene (MG) and nitrogen-doped graphene (NG).
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