Authors
Yajing Li, Yuan Qiu, Yingli Wang, Lei Wang, Qingliang Lv
Published in
ACS nano. Sep 04, 2025. Epub Sep 04, 2025.
Abstract
Development of aprotic lithium-oxygen (Li-O2) batteries suffers from slow cathode reaction kinetics, numerous side reactions, and large polarization, which are intimately related to the discharge product of Li2O2. Here, we designed and prepared a modified Co3O4 nanoparticle with atomic Ru substitution at octahedral Co sites supported by carbon nanocages (RuCoOx@HCNs) as a cathode catalyst. The asymmetrical octahedral Ru-O-Co units trigger a strong electron coupling effect, leading to charge redistribution and optimization of the d-orbital energy levels, thus facilitating oxygen activation and conversion into superoxide anions during discharging. More importantly, the Ru-O-Co units manifest high affinity for the intermediate LiO2, inducing the rapid formation of unique nanoneedle-like Li2O2 on RuCoOx@HCNs, avoiding the accumulation of byproducts and accelerating its decomposition during charge. These merit the Li-O2 battery with RuCoOx@HCNs to deliver a reduced polarization of 0.96 V and a prolonged lifespan of over 2200 h.
PMID:
40906901
Bibliographic data and abstract were imported from PubMed on 05 Sep 2025.
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