Catalyst and electrolyte synergy in Li-Osub(2) batteries
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Physical Chemistry Chemical Physics
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Understanding the interactions between catalyst and electrolyte in Li–O2 systems is crucial to improving
capacities, efficiencies, and cycle life. In this study, supported noble metal catalysts Pt/C, Pd/C, and Au/C
were paired with popular Li–O2 electrolyte solvents dimethoxyethane (DME), tetraglyme (TEGDME), and
dimethyl sulfoxide (DMSO). The effects of these combinations on stability, kinetics, and activity were
assessed. We show evidence of a synergistic effect between Pt and Pd catalysts and a DMSO-based
electrolyte which enhances the kinetics of oxygen reduction and evolution reactions. DME and TEGDME
are more prone to decomposition and less kinetically favorable for oxygen reduction and evolution than
DMSO. While the order of oxygen reduction onset potentials with each catalyst was found to be consistent across electrolyte (Pd > Pt > Au), larger overpotentials with DME and TEGDME, and negative shifts in
onset after only five cycles favor the stability of a DMSO electrolyte. Full cell cycling experiments confirm
that catalyst–DMSO combinations produce up to 9 times higher discharge capacities than the same with
TEGDME after 20 cycles (B707.4 vs. 78.8 mA h g1 with Pd/C). Ex situ EDS and in situ EIS analyses
of resistive species in the cathode suggest that improvements in capacity with DMSO are due to a
combination of greater electrolyte conductivity and catalyst synergies. Our findings demonstrate
that co-selection of catalyst and electrolyte is necessary to exploit chemical synergies and improve the
performance of Li–O2 cells.
Como referenciar
GITTLESON, FORREST S.; SEKOL, RYAN C.; DOUBEK, GUSTAVO; LINARDI, MARCELO; TAYLOR, ANDRE D. Catalyst and electrolyte synergy in Li-Osub(2) batteries. Physical Chemistry Chemical Physics, v. 16, n. 7, p. 5230-5237, 2014. DOI: 10.1039/c3cp54555e. Disponível em: http://repositorio.ipen.br/handle/123456789/8984. Acesso em: 20 Mar 2026.
Esta referência é gerada automaticamente de acordo com as normas do estilo IPEN/SP (ABNT NBR 6023) e recomenda-se uma verificação final e ajustes caso necessário.