| 학회 |
한국공업화학회 |
| 학술대회 |
2019년 가을 (10/30 ~ 11/01, 제주국제컨벤션센터(ICC JEJU)) |
| 권호 |
23권 2호 |
| 발표분야 |
포스터_무기재료 |
| 제목 |
Assessing the effect of CO2 in Li–O2/CO2 Batteries with Tetraglyme Electrolyte |
| 초록 |
Reflecting the languished research state of Li–O2, alternative devices operating under CO2 or O2/CO2 with analogously high theoretical energy density have gained recent attraction. Here, we assess the effect of CO2 within a 5 to 100% range in Li–O2/CO2. In the LiTFSI/tetraglyme electrolyte, the reaction mechanism is swiftly shifted toward the formation of Li2CO3 even at 5% CO2. Conspicuous product and intermediate species identification and quantification are presented. Tuning the CO2 content is shown to offer superior cyclability, deterred by-product formation with enhanced electrolyte stability, and extended discharge capacity (1.5-fold), correlated with an induced stabilization of metastable CO4−/C2O62− intermediates in tetraglyme. These findings highlight the promise of a shift in the underlying mechanism of Li–air cells upon CO2 incorporation on conventional O2-based devices. |
| 저자 |
Filipe Marques Mota1, 변혜령2, 김동하1
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| 소속 |
1Ewha Womans Univ., 2KAIST |
| 키워드 |
Li-O2 battery; Li-CO2; CO2 reutilization
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| E-Mail |
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