Synergistic effect of Co‐Mo pinning in lay‐structured oxide cathode for enhancing stability toward potassium‐Iion batteries

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dc.contributor.authorHan, WZen_AU
dc.contributor.authorGao, XWen_AU
dc.contributor.authorSong, YYen_AU
dc.contributor.authorWang, XCen_AU
dc.contributor.authorGao, GPen_AU
dc.contributor.authorChen, Hen_AU
dc.contributor.authorGu, QFen_AU
dc.contributor.authorLuo, WBen_AU
dc.date.accessioned2025-07-01T05:14:08Zen_AU
dc.date.available2025-07-01T05:14:08Zen_AU
dc.date.issued2024-03-10en_AU
dc.date.statistics2025-07-01en_AU
dc.description.abstractOwing to the high economic efficiency and energy density potential, manganese‐based layer‐structured oxides have attracted great interests as cathode materials for potassium ion batteries. In order to alleviate the continuous phase transition and K+ re‐embedding from Jahn‐Teller distortion, the [Mn‐Co‐Mo]O6 octahedra are introduced into P3‐K0.45MnO2 herein to optimize the local electron structure. Based on the experimental and computational results, the octahedral center metal molybdenum in [MoO6] octahedra proposes a smaller ionic radius and higher oxidation state to induce second‐order JTE (pseudo‐JTE) distortion in the adjacent [MnO6] octahedra. This distortion compresses the [MnO6] octahedra along the c‐axis, leading to an increased interlayer spacing in the K+ layer. Meanwhile, the Mn3+/Mn4+ is balanced by [CoO6] octahedra and the K+ diffusion pathway is optimized as well. The proposed P3‐K0.45Mn0.9Co0.05Mo0.05O2 cathode material shows an enhanced cycling stability and rate performance. It demonstrates a high capacity of 80.2 mAh g−1 at 100 mAh g−1 and 77.3 mAh g−1 at 500 mAh g−1. Furthermore, it showcases a 2000 cycles stability with a 59.6% capacity retention. This work presents a promising solution to the challenges faced by manganese‐based layered oxide cathodes and offers a deep mechanism understanding and improved electrochemical performance. © 1999-2025 John Wiley & Sons, Inc or related companies.en_AU
dc.description.sponsorshipThis work was supported by the National Natural Science Foundation of China (Grant No. 52272194), LiaoNing Revitalization Talents Program (Grant No. XLYC2007155). This manuscript was written through the contributions of all the authors. All authors have given approval to the final version of the manuscript.en_AU
dc.format.mediumPrint-Electronicen_AU
dc.identifier.articlenumber2400252en_AU
dc.identifier.citationHan, W., Gao, X.-W., Song, Y., Wang, X., Gao, G., Chen, H., Gu, Q., & Luo, W.-B. (2024). Synergistic effect of Co-Mo pinning in lay-structured oxide cathode for enhancing stability toward potassium-ion atteries. Small, 20(31), 2400252. doi:10.1002/smll.202400252en_AU
dc.identifier.issn1613-6810en_AU
dc.identifier.issn1613-6829en_AU
dc.identifier.issue31en_AU
dc.identifier.journaltitleSmallen_AU
dc.identifier.urihttps://doi.org/10.1002/smll.202400252en_AU
dc.identifier.urihttps://apo.ansto.gov.au/handle/10238/16219en_AU
dc.identifier.volume20en_AU
dc.languageEnglishen_AU
dc.language.isoenen_AU
dc.publisherWileyen_AU
dc.subjectPotassiumen_AU
dc.subjectCathodesen_AU
dc.subjectCobalten_AU
dc.subjectMolybdenumen_AU
dc.subjectManganeseen_AU
dc.subjectElectronsen_AU
dc.subjectOxidesen_AU
dc.subjectElectrochemistryen_AU
dc.subjectEnergy densityen_AU
dc.subjectElectric conductivityen_AU
dc.subjectNickelen_AU
dc.titleSynergistic effect of Co‐Mo pinning in lay‐structured oxide cathode for enhancing stability toward potassium‐Iion batteriesen_AU
dc.typeJournal Articleen_AU
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