| 학회 |
한국공업화학회 |
| 학술대회 |
2019년 가을 (10/30 ~ 11/01, 제주국제컨벤션센터(ICC JEJU)) |
| 권호 |
23권 2호 |
| 발표분야 |
포스터_무기재료 |
| 제목 |
Mapping mechanistic pathways driven by the effect of a Br3–/Br2 redox promoter in CO2-assisted Li–O2 Batteries |
| 초록 |
Rechargeable Li–air cells operating under CO2 or O2/CO2 offer alternative mechanistic pathways with analogously high theoretical energy density. The Li–O2/CO2 cell in tetraglyme electrolyte suffers from recharge potentials at ~4.5 V required for the decomposition of the main discharge product, Li2CO3. In this work we assess the promise of incorporating a Br3–/Br2 redox promoter. Hindered overcharges (~0.5 V) driven by electrochemically-generated Br2 are revealed to be a function of the LiBr concentration and the insulating Li2CO3 structure. Coupled electrochemical and spectroscopic analyses at progressive states-of-charge are proposed as a seminal methodology to dissect the underlying complexity of involved redox shuttling steps and evaluate the appropriateness of redox mediators beyond an overcharge decrease. |
| 저자 |
Filipe Marques Mota1, 변혜령2, 김동하1
|
| 소속 |
1Ewha Womans Univ., 2KAIST |
| 키워드 |
Li-O2 battery; Li-CO2; redox mediator; bromide
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| E-Mail |
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