| 학회 |
한국고분자학회 |
| 학술대회 |
2022년 봄 (04/06 ~ 04/08, 대전컨벤션센터) |
| 권호 |
47권 1호 |
| 발표분야 |
콜로이드 및 분자조립 부문위원회 |
| 제목 |
Unraveling Plasmonic and Catalytic Effects in a Practical Plasmon-enhanced Lithium–Oxygen Battery |
| 초록 |
Rechargeable Li–O2 batteries have high theoretical energy density (~3600 Wh kg-1). However, the sluggish OER kinetics disturb the recharging step by the large overpotential. Localized Surface plasmon resonance (LSPR) is the unique property of plasmonic materials. Under light illumination, plasmonic effects such as local heat, and hot carriers have found increasing application in catalysis. Here, we demonstrate plasmonic effect in the Li–O2 battery system by incorporating gold nanoparticles on the Ketjen Black (KB) cathode. During discharge, plasmonic Au NPs change the morphology of Li2O2 to small particles, which can be easily decomposed during recharge. Most importantly, the hot carriers by LSPR help to form and decompose Li2O2 and suppress side reactions with decreasing recharge overpotential and increasing the round-trip efficiency up to 80.2%. Meticulous analyses of the the near-field enhancement and local heat effects are here additionally introduced. |
| 저자 |
채경희, 김민주, Filipe Marques Mota, 김동하
|
| 소속 |
이화여자대 |
| 키워드 |
Li–O2 battery; Plasmonics; Light-enhanced batteries; Hot carriers; Near-field enhancement
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| E-Mail |
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