Disentangling plasmonic and catalytic effects in a practical plasmon-enhanced Lithium-Oxygen battery
- 주제(키워드) Li-O-2 battery , Plasmonics , Light-enhanced batteries , Hot carriers , Near-field enhancement
- 주제(기타) Chemistry, Physical; Electrochemistry; Energy & Fuels; Materials Science, Multidisciplinary
- 설명문(일반) [Chae, Kyunghee; Kim, Minju; Mota, Filipe Marques; Kim, Dong Ha] Ewha Womans Univ, Coll Nat Sci, Dept Chem & Nano Sci, Div Mol & Life Sci, 52 Ewhayeodae gil, Seoul 03760, South Korea; [Kim, Dong Ha] Ewha Womans Univ, Basic Sci Res Inst, 52 Ewhayeodae gil, Seoul 03760, South Korea; [Kim, Dong Ha] Ewha Womans Univ, Nanobio Energy Mat Ctr, Natl Res Facil & Equipment Ctr, 52, Ewhayeodae gil, Seoul 03760, South Korea
- 등재 SCIE, SCOPUS
- 발행기관 ELSEVIER
- 발행년도 2022
- 총서유형 Journal
- URI http://www.dcollection.net/handler/ewha/000000202976
- 본문언어 영어
- Published As https://doi.org/10.1016/j.jpowsour.2022.232002
초록/요약
Despite possessing high theoretical energy density, rechargeable Li-O-2 batteries face critical drawbacks towards commercialization. In line with recent attempts to integrate solar energy exploitation in high-energy storage, here we investigate the promise of plasmonic materials with unique light-interacting properties (localized surface plasmon resonance, LSPR) and emerging application in catalysis. Au nanoparticles (NPs) at increasing contents/ sizes are incorporated on conventional Ketjen Black cathodes, with preliminary half-cell measurements under-lining the promise of LSPR-generated hot-carriers on the O-2 electrochemistry. The illuminated battery with facile Li2O2 formation/decomposition, small Li2O2 particles, and suppressed carboxylate side-products unlocks a round-trip efficiency boost from 75.2 to 80.2% (first cycle) and a similar to 1.2-fold full capacity enhancement. Even more remarkably, with continuous cycling (30 cycles), a 680 mV-overpotential suppression is here reported. Comparatively, dark conditions reveal negligible Au-driven catalytic effects, whereas LSPR-induced local heat effects are ruled out upon meticulous assessment of the product selectivity in cells at increasing temperatures. These outstanding efficiencies are ensured even with larger particles (5-100 nm), as corroborated by corresponding galvanostatic profiles and finite-difference time-domain simulations, pinpointing the practicality of our cathodes towards scale-up. This contribution is the first to disentangle catalytic effects and plasmon relaxation pathways over practical carbon-based cathodes for high-energy storage.
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