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  • 03월 07일 19시 이후 : 초록수정 불가능, 일정확인 및 검색만 가능

제107회 대한화학회 학술발표회, 총회 및 기기전시회 Searching for highly efficient electrode materials for electrochemical energy conversion and storage systems

2011년 3월 24일 17시 19분 30초
INOR2-1 이곳을 클릭하시면 발표코드에 대한 설명을 보실 수 있습니다.
금 09시 : 00분
무기화학 - Inorganic/Material Science in Energy Applications II
저자 및
김민식, 김정호, 양대수, 송민영, 유종성
고려대학교 신소재화학과, Korea
Fuel cells and rechargeable lithium ion batteries and are becoming key-enabling technologies and have potential applications in low/zero-emission electric and hybrid vehicles distributed home power generators, and power sources for small portable electronics. In this study, ordered hierarchical nanostructured carbon (OHNC) with multimodal porosities ranging from macro- to meso-/micropores was investigated as efficient electrode materials in PEMFC and also explored as anode material in Li ion battery. The unique structural characteristics such as large surface area and mesopore volume enable the OHNCs to support high loading Pt nanoparticles with small particle size along with uniform particle dispersion. Pt/OHNCs electrodes have demonstrated considerably improved catalytic activity toward oxygen reduction reaction and markedly enhanced PEMFC polarization performance. In the case of Li ion battery, compared with other porous carbon counterparts such as activated carbon and ordered mesoporous carbon, OHNC also has demonstrated a larger Li ion storage capacity and better rate capability. Such better catalytic activity and capacity performance in fuel cell and Li ion battery are mainly attributable to its fantastic structural characteristics such as large specific surface area and mesoporous volume, particularly well-developed 3D interconnected ordered macropore framework with open mesopores embedded in the macropore walls, facilitating fast mass and charge transport and electron transfer and reducing volume change during the charge–discharge cycling especially at high rates.