Abstract
Sodium-ion batteries have not only garnered substantial attention for grid-scale energy storage owing to the higher abundance of sodium compared with lithium, but also present the possibility of fast charging because of the inherently higher sodium-ion mobility. However, it remains a phenomenal challenge to achieve a combination of these merits, given the complex structural chemistry of sodium-ion oxide materials. Here we show that O3-type sodium-ion layered cathodes (for example, Na5/6Li2/27Ni8/27Mn11/27Ti6/27O2) have the potential to attain high power density, high energy density (260 Wh kg−1 at the electrode level) and long cycle life (capacity retention of 80% over 700 cycles in full cells). The design involves introduction of characteristic P3-structural motifs into an O3-type framework that serves to promote sodium-ion diffusivity and address detrimental transition metal migration and phase transition at a high state of charge. This study provides a principle for the rational design of sodium-ion layered oxide electrodes and advances the understanding of the composition–structure–property relationships of oxide cathode materials.
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Data availability
The datasets generated and/or analysed during the study are available from the corresponding authors on reasonable request.
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Acknowledgements
We acknowledge the financial support from the Netherlands Organization for Scientific Research (NWO) grant 16122 (M.W.). This research used 11-ID-C beamline at the Advanced Photon Source, a US Department of Energy (DOE) Office of Science User Facility operated for the DOE Office of Science by Argonne National Laboratory under Contract grant DE-AC02-06CH11357 (J.L.). We also acknowledge the financial support from the National Natural Science Foundation of China grant 51991344 (X.B.) and the Chinese Academy of Sciences grant XDB33000000 (X.B.).
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M.W. and Q.W. conceived the project. Q.W., D.Z., Z.Y. and C.Z. carried out the synthesis, material characterization and electrochemical measurements. H.G. collected the NPD data; L.W. and J.L. collected the SXRD data; and Q.W. and C.Z. interpreted the data. J.W. and X.B. performed the TEM measurement. D.Z., D.W. and G.S. collected and interpreted the XAS and RIXS data. All authors participated in discussing the results. Q.W., M.W., C.Z., J.L. and D.Z. prepared and revised the paper with inputs from all other authors.
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Wang, Q., Zhou, D., Zhao, C. et al. Fast-charge high-voltage layered cathodes for sodium-ion batteries. Nat Sustain 7, 338–347 (2024). https://doi.org/10.1038/s41893-024-01266-1
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DOI: https://doi.org/10.1038/s41893-024-01266-1
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