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보조에너지원으로서의 수퍼커패시터용 나노전극소재로서의 탄소/망간산화물의 전기화학적 특성
안균영(Ahn, Kyun-Young),마상복(Ma, Sang-Bok),김광범(Kim, Kwang-Bum) 한국신재생에너지학회 2007 한국신재생에너지학회 학술대회논문집 Vol.2007 No.11
Birnessite-type manganese dioxide(MnO₂) was coated uniformly onto carbon nanotubes (CNTs) through a spontaneous direct redox reaction between CNTs and permanganate ions(MnO₄;^-). The initial specific capacitance of the MnO₂/CNT nanocomposite in an organic electrolyte at a large current density of 1 A/g was 250 F/g, which is equivalent to 139 mAh/g based on the total weight of the electrode material including the electroactive material, conducting agent and binder. The specific capacitance of the MnO₂ in the MnO₂/CNT nanocomposite was as high as 580 F/g (320 mAh/g), indicating excellent electrochemical utilization of the MnO₂. The addition of CNTs as a conducting agent can improve the high rate capability of MnO₂/CNT nanocomposite considerably. An analysis of the in-situ X-ray absorption near-edge structure (XANES) showed an improvement in the structural and electrochemical reversibility of the MnO₂/CNT nanocomposite by heat-treatment.
배터리/슈퍼커패시터 하이브리드 ESU의 상온 및 저온에서의 성능 평가 및 제어 전략 개발
이가은(Gaeun Lee),고성연(Sungyeon Ko),홍승철(Seungchul Hong),안균영(Kyunyoung Ahn),남재도(Jaedo Nam),김현수(Hyunsoo Kim) 한국자동차공학회 2011 한국자동차공학회 학술대회 및 전시회 Vol.2011 No.11
In this study, the performance verification of an electric vehicle (EV) with a battery/supercapacitor hybrid energy storage unit (ESU) in room and low temperature was conducted, and a control strategy for the hybrid ESU was proposed. For the battery/supercapacitor hybrid ESU, a control strategy was proposed, which controls the battery power when the battery power demand was greater than the battery power limit, and the insufficient or extra power was managed in the supercapacitor. For the performance verification, simulation was conducted for various temperatures and number of supercapacitors.