| 학회 |
한국재료학회 |
| 학술대회 |
2021년 가을 (11/24 ~ 11/26, 경주 라한호텔) |
| 권호 |
27권 2호 |
| 발표분야 |
C. 에너지 재료 분과 |
| 제목 |
Stack Pressure Measurement to Probe the Evolution of the Lithium/Solid-State-Electrolyte Interface |
| 초록 |
Although solid state batteries with Li metal could enable higher energy density and better safety characteriestics than Li ion batteries, the electro-chemo-mechanical evolutino of Li/solid-electrolyte interface can diminish performance. Here, we measure the stack pressure in real time to provide new insight into the effects of applied stack pressure and electrolyte processing on the interfacial behavior of two representative solid-state electrolytes. These materials exhibit different degradation mechanisms either through interphase formation or Li filament growth. We find that stack pressure evolution sensitively depends on interphase formation, and that tracking stack pressure coupled with impedance can distinguish between various reaction phenamena and degradation mechanisms within cells. Furthermore, Li filament growth exhibits distinct stack pressure signatures that depend on electrolyte density. The findings advance our understanding of the interfacial evolution of two important classes of solid state electrolyte, and they demonstrate the utility of electro-chemo-mechanical measruements to understand solid-state battery behaivor |
| 저자 |
Chanhee Lee1, Hyun-Wook Lee2, Matthew T. McDowell3
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| 소속 |
1Department of Energy Engineering, 2School of Energy and Chemical Engineering, 3Ulsan National Institute of Science & Technology (UNIST) |
| 키워드 |
<P>sulfide solid state electrolyte; stack pressure; interphase growth; Li filaments</P>
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| E-Mail |
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