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NTIS 바로가기세라미스트 = Ceramist, v.21 no.4, 2018년, pp.349 - 365
강병우 (포항공과대학교) , 박희택 (포항공과대학교) , 우승준 (포항공과대학교) , 강민석 (포항공과대학교) , 김아빈 (포항공과대학교)
Since the electrification of vehicles has been extended, solid-state batteries have been attracting a lot of interest because of their superior safety. Especially, polymer, sulfide, and oxide based materials are being studied as solid electrolytes, and each type of materials has advantaged and disad...
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핵심어 | 질문 | 논문에서 추출한 답변 |
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전지의 안전성을 향상시키기 위해 필요한 연구는? | 1) 중대형 에너지 저장장치의 구현을 위해서 현재보다 에너지 밀도, 가격, 안전성 등의 성능이 획기적으로 향상된 리튬이온전지의 개발이 필수적이다. 특히, 전지의 안전성을 향상시키기 위해서 인화성 용매를 사용하는 액체전해질을 고체전해질로 대체한 전고체 리튬이온 전지에 대한 연구가 활발히 이루어지고 있다. | |
셀 패키징 시 고체전해질의 장점은? | 1) 둘째, 패키징에 의한 에너지밀도 증가이다. 중대형 전지를 위해 셀을 패키징할 때, 액체전해질은 각각 셀을 모두 밀봉한 뒤 모듈과 팩으로 조립해야 하지만, 고체전해질은 적층만으로 여러 개의 셀을 조립한 뒤 밀봉할 수 있다. 이러한 이유로 셀의 성능 향상 없이도 전지의 부피가 1/5로 감소하여 부피당 에너지 밀도를 향상시킬 수 있을 것으로 예측되고 있다. | |
도요타에서 개발하는 황화물 고체전해질의 단점은? | 4) 도요타 (Toyata)사에서는 2010년 LiCoO2 양극, 황화물 고체전해질, 흑연 음극의 prototype 셀을 발표한 이후 상용화를 목표로 연구 개발을 진행 중이다. 하지만, 황화물계 고체전해질은 공기 중 산소와 수분과 반응하여 치명적인 독성 물질인 황화수소(H2S)를 만들 수 있고 산화물계인 양극 활물질과 접촉 시 부반응을 일으키기 때문에 밀봉과 계면 처리를 위한 공정비용이 높아질 수 있다. 또한, 황화물 전해질은 리튬 금속과 반응하기 때문에 음극으로써 고용량 리튬 금속을 사용할 수 없어 사용 가능한 에너지를 감소시킬 수 있다.4) |
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