화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Polymer(Korea), Vol.41, No.3, 500-506, May, 2017
DOI10.7317/pk.2017.41.3.500  Export Citation
전자선 조사로 표면 구조가 제어된 활성탄소섬유의 전기화학적 특성 향상
Enhancement of Electrochemical Properties of Activated Carbon Fibers with Controlled Surface Structure by Electron Beam Irradiation
조한주, 정민정, 이영석†
  • 충남대학교 응용화학공학과
Hanjoo Jo, Min-Jung Jung, and Young-Seak Lee†
  • Department of Chemical Engineering and Applied Chemistry, Chungnam National University, Daejeon 34134, Korea
E-mail:
초록
본 연구에서는 활성탄소섬유를 제조한 뒤 전자선 조사를 실시하였으며, 다양한 흡수선량에 따른 활성탄소섬유 표면의 물리화학적 특성 변화가 전기화학적 특성에 미치는 영향을 알아보았다. 전자선 조사에 의하여 활성탄소섬유 표면의 구조적 결함은 감소하고 C-C (sp2) 결합은 증가하였다. 또한 전자선 조사된 활성탄소섬유가 미처리된 활성탄소섬유보다 비표면적 및 기공부피가 훨씬 더 컸다. 이러한 표면 구조 변화는 전자선 조사에 따른 활성탄소섬유 표면에서의 결함 형성 및 탄소원자의 재 혼성화에 의한 것으로 여겨진다. 200 kGy로 조사된 활성탄소섬유의 비정전용량은 미처리된 활성탄소섬유보다 39% 향상되었다. 전자선 조사 활성탄소섬유의 이러한 전기화학적 특성의 향상은 활성탄소섬유 표면의 비표면적 및 기공 부피 증가에 기인되었다.
In this study, activated carbon fibers (ACFs) were prepared and then irradiated by electron beam (e-beam) to investigate effects of physicochemical properties of ACF surface on the electrochemical properties of ACFs according to various irradiation doses. Defects of the ACF surface were decreased and C-C (sp2) bonds onto that were increased via the e-beam irradiation. The specific surface area and pore volume of the e-beam irradiated ACFs were also much higher than those of the untreated ACFs. These changes of the surface structure on ACFs were caused by formation of defects and rehybridization of carbon atoms by e-beam irradiation. The specific capacitance of the ACFs irradiated with 200 kGy increased by 39% compared with the untreated ACFs. These enhancements of the electrochemical properties in e-beam irradiated ACFs were attributed to the increase in the specific surface area and pore volume.
Keywords:activated carbon fibers;electron beam;surface structure;electrochemical properties
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