화학공학소재연구정보센터
학회 한국공업화학회
학술대회 2016년 가을 (10/26 ~ 10/28, 제주국제컨벤션센터(ICCJEJU))
권호 20권 2호
발표분야 에너지저장변환_포스터
제목 For asymmetric supercapacitors, synthesis and design of ternary Co3O4/carbon coated TiO2 hybrid nanocomposites
초록 We report a carbon-coated TiO2/Co3O4 ternary hybrid nanocomposite (TiO2@C/Co) electrode for supercapacitors. A carbon layer was directly introduced onto the TiO2 surface via thermal vapor deposition. The carbon layer provides anchoring sites for the deposition of Co3O4, which was introduced onto the carbon-coated TiO2 surface by hydrazine and the thermal oxidation method. The TiO2@C/Co electrode exhibits much higher charge storage capacity relative to pristine TiO2, carbon-coated TiO2, and pristine Co3O4, showing a specific capacitance of 392.4 F g−1 at a scan rate of 5 mV s−1 with 76.2% rate performance from 5 to 500 mV s−1 in 1 M KOH aqueous solution electrolyte. The optimized TiO2@C/Co//AC supercapacitor could be cycled reversibly in the voltage range from 0 to 1.5 V, and it exhibits a specific capacitance of 59.35 F g−1 at a scan rate of 5 mV s−1 with a specific capacitance loss of 15.4% after 5000 charge–discharge cycles.
저자 김명진, 김기호, 최재호, 유석규, 김주헌
소속 중앙대
키워드 CO3O4/carbon composite; TiO2; asymmetric supercapcitor
E-Mail jooheonkim@cau.ac.kr