In-Situ Preparation of Graphene/Carbon Nanotube/Poly(styrenesulfonic acid-graft-polyaniline) Nanocomposite via Direct Exfoliation of Graphite for Supercapacitor Application
S-g-A를 이용한 흑연의 직접박리 및 다중벽 탄소나노튜브 분산을 통한 그래핀/탄소나노튜브/S-g-A 나노복합체 제작 및 슈퍼커패시터 전극으로 활용
- 공과대학 재료공학부
- Issue Date
- 서울대학교 대학원
- 학위논문 (석사)-- 서울대학교 대학원 : 재료공학부, 2016. 2. 조원호.
- Graphene/carbon nanotube/poly(styrenesulfonic acid-graft-aniline) (Gr/CNT/S-g-A) composites are prepared through direct exfoliation of graphite using S-g-A as a surfactant. Compared with other fabrication methods of graphene/CNT/polyaniline composites such as in-situ polymerization and electrochemical polymerization, the direct exfoliation method yields higher quality of graphene, because graphite is directly used as a precursor for graphene without chemical treatment. The in-situ prepared nanocomposite of Gr/CNT/S-g-A exhibits a superior specific capacitance of 531 F/g at a current density of 0.5 A/g, which is one of the highest values among supercapacitor electrodes based on graphene/CNT/polyaniline composites. This high value of specific capacitance is attributed to taking both advantages of high specific area of graphene and CNT and high pseudocapacitance of polyaniline.