| 학회 | 한국화학공학회 |
| 학술대회 | 2022년 봄 (04/20 ~ 04/23, 제주국제컨벤션센터) |
| 권호 | 28권 1호, p.1034 |
| 발표분야 | [주제 12] 화학공학일반(부문위원회 발표) |
| 제목 | Biomimetic Superoxide Disproportionation Catalysts for Anti-Aging Lithium-Oxygen Batteries |
| 초록 | Reactive oxygen species or superoxide (O 2 -) to damage biological cells is generated during metabolic pathways using oxygen as an electron acceptor in biological systems. Superoxide dismutase (SOD) protects cells from the superoxide-triggered apoptosis by converting superoxide to oxygen and peroxide. Lithium-oxygen battery (LOB) cells have the same aging problems caused by superoxide-triggered side reactions. We transplanted the function of SOD of biological systems into LOB cells. A series of organic and inorganic molecules to mimic the function of SOD (shortly, SOD mimics or SODm) were used as superoxide disproportionation chemo-catalysts. As expected, the SODm's as the superoxide scavenger improved capacity retention along charge/discharge cycles successfully. Experimentally observed toroidal morphology of the final discharge product of oxygen reduction (Li 2 O 2 ) and density functional theory calculation confirmed that the solution mechanism of Li 2 O 2 formation, more beneficial than the surface mechanism from the capacity-gain standpoint, was preferred in the presence of SODm. |
| 저자 | 송현곤 |
| 소속 | UNIST |
| 키워드 | 재료(Materials) |
| VOD | VOD 보기 |
| 원문파일 | 초록 보기 |
