| 학회 |
한국화학공학회 |
| 학술대회 |
2019년 봄 (04/24 ~ 04/26, 제주국제컨벤션센터) |
| 권호 |
25권 1호, p.479 |
| 발표분야 |
에너지 환경(Energy and Environment) |
| 제목 |
Bi-layer polymer electrolyte for highly stable lithium metal batteries |
| 초록 |
Li metal is the attractive next-generation anode material for lithium ion batteries(LIBs) due to its high theoretical specific capacity and low redox potential. However, there are several critical issues associated with an interface of Li metal. The repeated formation/collapse of an unstable solid electrolyte interphase(SEI) layer on the surface of the Li metal anode results in accumulated dendritic growth and isolated Li, which eventually lead to a short lifetime and safety issues. To solve these interfacial problems, we introduce a bi-layer consisting of a stacked structure of a polymer layer containing Ni microparticles and an additional identical polymer layer. After adopting this bi-layer structure, a symmetrical cell system showed a tolerable voltage range within ±15mV even at a high current density of 20 mA cm-2 up to 500 cycles. In addition, for Li metal batteries with the common cathode material LiFePO4, the specific capacity is maintained at 85.16% after 500 cycles at 5 C-rate when the bi-layer structure is used. Li metal batteries with the proposed bi-layer electrolyte show much better cycling characteristics than conventional polyolefin separators. |
| 저자 |
공용준1, 김연상1, 유가영1, 조진일1, 유지영2, 표선미1
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| 소속 |
1서울대, 2경북대 |
| 키워드 |
에너지 환경 |
| E-Mail |
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| 원문파일 |
초록 보기 |
