한국수소및신에너지학회논문집 (Transactions of the Korean hydrogen and new energy society)

  • 제33권5호
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  • Pages.574-582
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  • 2022
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  • 1738-7264(pISSN)
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  • 2288-7407(eISSN)
한국수소및신에너지학회 (The Korean Hydrogen and New Energy Society)
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LiAlH4-PVDF 전해질 복합체의 열확산 및 전기화학적 특성평가

Evaluation of Thermal Diffusivity and Electrochemical Properties of LiAlH4-PVDF Electrolyte Composites

  • 황준현 (한국교통대학교 응용화학에너지공학부 에너지소재공학전공) ;
  • 홍태환 (한국교통대학교 응용화학에너지공학부 에너지소재공학전공)
  • HWANG, JUNE-HYEON (Department of Energy Materials Science & Engineering, Korea National University of Transportation) ;
  • HONG, TAE-WHAN (Department of Energy Materials Science & Engineering, Korea National University of Transportation)
  • 투고 : 2022.08.23
  • 심사 : 2022.10.20
  • 발행 : 2022.10.30
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초록

A lithium-ion battery exhibits high energy density but has many limitations due to safety issues. Currently, as a solution for this, research on solid state batteries is attracting attention and is actively being conducted. Among the solid electrolytes, sulfide-based solid electrolytes are receiving much attention with high ion conductivity, but there is a limit to commercialization due to the relatively high price of lithium sulfide, which is a precursor material. This study focused on the possibility of relatively inexpensive and light lithium hydride and conducted an experiment on it. In order to analyze the characteristics of LiAlH4, ion conductivity and thermal stability were measured, and a composites mixed with PVDF, a representative polymer electrolyte, was synthesized to confirm a change in characteristics. And metallurgical changes in the material were performed through XRD, SEM, and BET analysis, and ion conductivity and thermal stability were measured by EIS and LFA methods. As a result, Li3AlH6 having ion conductivity higher than LiAlH4 is formed by the synthesis of composite materials, and thus ion conductivity is slightly improved, but thermal stability is rapidly degraded due to structural irregularity.

키워드

과제정보

본 연구는 정부(과학기술정보통신부)의 재원으로 한국연구재단의 지원을 받아 수행된 연구(2019R1F1A1041405)와 교육부가 지원하는 한국기초과학지원연구원을 통한 기초과학연구역량강화사업(국가연구시설장비진흥센터, 2019R1A6C1010047)의 지원에 의해 수행되었으며, 이에 감사드립니다.

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