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  • 09월 04일 17시 이후 : 초록수정 불가능, 일정확인 및 검색만 가능

제114회 대한화학회 학술발표회, 총회 및 기기전시회 안내 The study for rechargeable zinc-air batteries using zinc or zinc hydroxide as anode

2014년 8월 28일 14시 40분 06초
ELEC.P-1234 이곳을 클릭하시면 발표코드에 대한 설명을 보실 수 있습니다.
10월 15일 (수요일) 16:00~19:00
저자 및
양원근, 류광선*
울산대학교 화학과, Korea
Because zinc-air batteries have many advantages including high specific energy, competitive cost, abundant resources, and environmentally benign property, it is expected to be a promising power source and energy storage device in the near future. Zinc-air batteries has a theoretical specific energy of 1,085Wh/kg, and the theoretical cell voltage of 1.65 V. However, the practical working voltage of zinc-air batteries is less than 1.65 V due to the internal loss of the cell due to activation and ohmic and concentration loss. Primary zinc-air batteries have been widely commercialized as hearing aid. However, the utilization of rechargeable zinc-air batteries has been limited by some barriers related to the electrodes. These are problems originating from the zinc electrode, such as its low cycling stability, high degradation rate, passivation, and self-discharge. Thus, these problems must to solve for zinc secondary batteries. In this work, we totally study zinc anode reaction to solve problems caused by zinc anode for zinc secondary batteries. Thus, we estimated corrosion of zinc according to particle size of zinc. And, we investigated relationship between specific capacity and solubility according to zinc compounds such as zinc hydroxide (Zn(OH)2), zinc acetate ((CH3COO)2Zn), zinc chloride (ZnCl2) and zinc oxide (ZnO) powder. We confirmed improved electrochemical properties by containing electrolyte solution of high ratio and conducting agent in anode. In order to decrease corrosion of zinc anode and to make mixtures with high energy density (Zn 1,085Wh/kg, Mg 3,910Wh/kg, Si 8,470Wh/kg), zinc anode was made of zinc-magnesium-silicon mixtures.