Structural Distortion in the Wadsley-Roth Niobium Molybdenum Oxide Phase Triggering Extraordinarily Stable Battery Performance
Date
2024
Authors
Wu, Z.
Liang, G.
Pang, W.K.
Zou, J.
Zhang, W.
Chen, L.
Ji, X.
Didier, C.
Peterson, V.K.
Segre, C.U.
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Advisors
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Journal article
Citation
Angewandte Chemie International Edition, 2024; 63(9):e202317941-1-e202317941-10
Statement of Responsibility
Zhibin Wu, Gemeng Liang, Wei Kong Pang, Jinshuo Zou, Wenchao Zhang, Libao Chen, Xiaobo Ji, Christophe Didier, Vanessa K. Peterson, Carlo U. Segre, Bernt Johannessen, and Zaiping Guo
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Abstract
Wadsley-Roth niobium oxide phases have attracted extensive research interest recently as promising battery anodes. We have synthesized the niobium-molybdenum oxide shear phase (Nb, Mo)13O33 with superior electrochemical Li-ion storage performance, including an ultralong cycling lifespan of at least 15000 cycles. During electrochemical cycling, a reversible single-phase solid-solution reaction with lithiated intermediate solid solutions is demonstrated using in situ X-ray diffraction, with the valence and short-range structural changes of the electrode probed by in situ Nb and Mo K-edge X-ray absorption spectroscopy. This work reveals that the superior stability of niobium molybdenum oxides is underpinned by changes in octahedral distortion during electrochemical reactions, and we report an in-depth understanding of how this stabilizes the oxide structure during cycling with implications for future long-life battery material design.
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© 2024 The Authors. Angewandte Chemie International Edition published by Wiley-VCH GmbH. This is an open access article under the terms of the Creative Commons Attribution Non-Commercial License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited and is not used for commercial purposes.