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직류전기철도의 누설전류 방지대책에 대한 고찰(2) : 일본
하윤철(Yoon-Cheol Ha),배정효(Jeong-Hyo Bae),하태현(Tae-Hyun Ha),이현구(Hyun-Goo Lee),김대경(Dae-Kyeong Kim) 대한전기학회 2006 대한전기학회 학술대회 논문집 Vol.2006 No.7
The wide spread of DC electric railway systems such as urban rapid transits including heavy rail and light rail transits has significant ramification as the stray currents from return conductor rails can cause the electrochemical interference, that is, the electrolytic corrosion of both rails and outside underground metallic infrastructures. The immature understanding of either the railway authority who is responsible for establishing the necessary provisions at the design stage or the affected parties makes it difficult to prepare the optimum range of solutions for the long-pending interference problem. In Japan, however, numerous assessment studies have been carried out on the stray current interference, by which protective guidelines are provided by "Electrolysis Committee". In this paper, we review a guide book from "Tokyo Electrolysis Committee", namely, "Protective Methods for Stray Current Corrosion".
전고체전지 상용화를 위한 황화물 고체전해질 기술 개발 동향
하윤철(Yoon-Cheol Ha) 한국전지학회 2021 한국전지학회지 Vol.1 No.1
본 논문에서는 차세대 전지 중 가장 주목받고 있는 전지 중 하나인 전고체전지의 상용화를 위한 황화물계 고체전해질 기술의 개발 동향을 살펴 보고, 특히 대량 생산이 용이한 액상합성법과 최근 한국전기연구원에서 개발한 공침 제조기술에 대해 소개한다. This paper presents the recent trends in the development of sulfide solid electrolytes for all-solid-state batteries which have been considered as one of the most promising next-generation batteries. In particular, the solution synthesis routes including recently developed co-precipitation method are introduced in view of the mass-production of sulfide solid electrolytes.