Disentangling plasmonic and catalytic effects in a practical plasmon-enhanced Lithium–Oxygen battery

Kyunghee Chae, Minju Kim, Filipe Marques Mota, Dong Ha Kim

Research output: Contribution to journalArticlepeer-review

2 Scopus citations


Despite possessing high theoretical energy density, rechargeable Li–O2 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 underlining the promise of LSPR-generated hot-carriers on the O2 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 ∼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.

Original languageEnglish
Article number232002
JournalJournal of Power Sources
StatePublished - 1 Nov 2022

Bibliographical note

Funding Information:
This work was supported by National Research Foundation of Korea (NRF) Grant funded by the Korean Government ( 2020R 1A 2C 3003958 ), by Basic Science Research Program (Priority Research Institute) through the NRF of Korea funded by the Ministry of Education ( 2021R1A6A1A10039823 ), by the Korea Basic Science Institute (National Research Facilities and Equipment Center) grant funded by the Ministry of Education ( 2020R 1A 6C 101B194 ) and by the Creative Materials Discovery Program through the NRF funded by the Ministry of Science and ICT (2018 M 3D 1A 1058536). F.M.M. acknowledges the support by the Brain Pool Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Science and ICT ( 2017H1D3A1A02054206 ).

Publisher Copyright:
© 2022


  • Hot carriers
  • Light-enhanced batteries
  • Li–O battery
  • Near-field enhancement
  • Plasmonics


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