| 학회 |
한국공업화학회 |
| 학술대회 |
2015년 봄 (04/29 ~ 05/01, BEXCO (부산)) |
| 권호 |
19권 1호 |
| 발표분야 |
(에너지저장변환) 포스트 리튬이차전지 연구개발 동향 |
| 제목 |
고성능 리튬 설퍼 전지 구현을 위한 폴리설파이드 억제막 (Polysulfide Rejection Layer for High Performance Lithium–Sulfur Battery) |
| 초록 |
The polysulfide shuttle has been an impediment to the development of lithium–sulfur batteries with high capacity and cycling stability. Here, we report a new strategy to remedy the problem that uses alpha-lipoic acid (ALA), as an electrolyte additive to form a polysulfide rejection layer on the cathode surface via the electrochemical and chemical polymerization of ALA during the first discharge. The poly(ALA) layer formed in situ effectively prevents the polysulfide shuttle and consequently enhances the discharge capacity and cycling stability, owing to the Donnan potential developed between the polysulfide-concentrated cathode and the fixed negative charge-concentrated poly(ALA) layer. The approach, based on a thermodynamic equilibrium and a natural material, encompasses a new scientific strategy and provides a practical methodology for high performance lithium–sulfur batteries. |
| 저자 |
Hee-Tak Kim1, Jongchan Song1, Hyungjun Noh1, Hongkyung Lee1, Je-Nam Lee1, Dong Jin Lee1, Yunju Lee2, Chul Hwan Kim3, Yong Min Lee2, Jung-Ki Park1
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| 소속 |
1KAIST, 2한밭대, 3오렌지파워 |
| 키워드 |
리튬설퍼전지; 폴리설파이드; 알파-리포익산
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| E-Mail |
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