초록문의 abstract@kcsnet.or.kr

결제문의 member@kcsnet.or.kr

현재 가능한 작업은 아래와 같습니다.
  • 09월 08일 17시 이후 : 초록수정 불가능, 일정확인 및 검색만 가능

제116회 대한화학회 학술발표회, 총회 및 기기전시회 안내 Nitrogen and phosphorus co-doped cubic ordered mesoporous carbon as supercapacitor electrode material with extraordinary cyclic stability

2015년 8월 27일 16시 49분 36초
MAT.P-457 이곳을 클릭하시면 발표코드에 대한 설명을 보실 수 있습니다.
10월 16일 (금요일) 13:00~14:30
저자 및
PANJA TANDRA, dhrubajyoti bhattach1, 유종성2,*
대구경북과학기술원(DGIST) 에너지시스템공학부, India
1고려대학교 화학, India
2대구경북과학기술원(DGIST) 에너지시스템공학과, Korea

Heteroatom and porosity both have different, but definite effect on the electrochemical capacitance of carbon materials. These effects are studied in details by cubic ordered mesoporous carbons (OMCs) co-doped with N and P. 3-dimentional (3D) mesoporous silica, KIT-6 is utilized as a hard template to synthesize the cubic OMC. Interestingly, although the porosity parameters e.g. surface area and pore volume do not change much with N doping, a significant increase of these values is observed upon P doping. Moreover, the P content does not affect the N doping characteristics on co-doping of both N and P. When tested as supercapacitor electrode, the N-OMC despite much lower porosity parameters, exhibits similar specific capacitance compared with the P-OMC. High specific capacitance in NOMC arises mainly from the pseudocapacitive effect of doped N species, whereas high porosity parameters are the main reason for the specific capacitance shown by P-OMC. The synergistic contribution of both effects enables the NP co-doped OMC to show highest specific capacitance of 210 F g-1 at 1.0 A g-1. Moreover, excellent retention of specific capacitance with more than 90 % of initial capacitance is observed for NP-OMC at high current density of 10 A g-1. and also for 3000 charge-discharge cycles. This is mainly because of high-surface area hierarchical porous structures with uniform and ordered mesopores in the cubic OMC, which facilitate the unrestricted movement of electrolyte ions to access the active surfaces, as well as excellent synergistic effect of co-doping of N and P.