Water-mediated super-correlated proton-assisted transport mode for solid-state K−O2 batteries

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dc.contributor.authorKong, DCen_AU
dc.contributor.authorAvdeev, Men_AU
dc.contributor.authorSong, LNen_AU
dc.contributor.authorZhen, LJen_AU
dc.contributor.authorWang, XXen_AU
dc.contributor.authorXu, JJen_AU
dc.date.accessioned2024-09-10T06:00:07Zen_AU
dc.date.available2024-09-10T06:00:07Zen_AU
dc.date.issued2024-09en_AU
dc.date.statistics2024-08-23en_AU
dc.description.abstractA comprehensive understanding of the behavior nature of fast ions at the atomic level is essential for the development of advanced solid-state ionic conductors. The inadequate inter-ion correlation effects of current ion transport models lead to a conductivity bottleneck in designing conductors. Herein, based on water-mediated proton-assisted ion transport, a novel transport mode with simultaneous anion-cation and inter-cation coupling is designed, enabling the K-ions of the modeled solid-state ionic conductor K2Fe4O7 crystals to achieve an ultra-high conductivity of 7.6 × 10–2 S cm–1, an enhancement of two orders of magnitude. The principle of the accelerated K-ion diffusion through the rotation and vibration of water molecules around the framework oxygen atom is elaborated, and the coupling correlation between proton and K-ion transport is confirmed using in-situ impedance spectroscopy under labeled isotopes. The application of this mechanism enabled the fabricated K−O2 solid-state battery exhibit an ultra-low overpotential (0.1 V) and excellent rate performance. Further, the mechanism is also applicable for Li and Na-ion conductors, providing significant theoretical guidance for breaking existing universal design rules and for the development for faster ionic conductors. © 2024 Elsevier B.V.en_AU
dc.description.sponsorshipThis work was financially supported by the National Natural Science Foundation of China (Grant 21835002, 21621001), the 111 Project (B17020), Changchun City Science and Technology Development Program (Grant No. 21ZY16), and the Fundamental Research Funds for the Central Universities.en_AU
dc.identifier.articlenumber103699en_AU
dc.identifier.citationKong, D.-C., Avdeev, M., Song, L.-N., Zheng, L.-J., Wang, X.-X., & Xu, J.-J. (2024). Water-mediated super-correlated proton-assisted transport mode for solid-state K−O2 batteries. Energy Storage Materials, 72, 103699. doi:10.1016/j.ensm.2024.103699en_AU
dc.identifier.isbn2405-8297en_AU
dc.identifier.journaltitleEnergy Storage Materialsen_AU
dc.identifier.urihttps://apo.ansto.gov.au/handle/10238/15678en_AU
dc.identifier.volume72en_AU
dc.language.isoenen_AU
dc.publisherElsevieren_AU
dc.relation.urihttps://doi.org/10.1016/j.ensm.2024.103699en_AU
dc.subjectIonic conductivityen_AU
dc.subjectDiffusionen_AU
dc.subjectProtonsen_AU
dc.subjectWateren_AU
dc.subjectElectric batteriesen_AU
dc.subjectIonsen_AU
dc.subjectCationsen_AU
dc.subjectConductor devicesen_AU
dc.subjectSpectroscopyen_AU
dc.titleWater-mediated super-correlated proton-assisted transport mode for solid-state K−O2 batteriesen_AU
dc.typeJournal Articleen_AU
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