Abstract
A critical current challenge in the development of all-solid-state lithium batteries (ASSLBs) is reducing the cost of fabrication without compromising the performance. Here we report a sulfide ASSLB based on a high-energy, Co-free LiNiO2 cathode with a robust outside-in structure. This promising cathode is enabled by the high-pressure O2 synthesis and subsequent atomic layer deposition of a unique ultrathin LixAlyZnzOδ protective layer comprising a LixAlyZnzOδ surface coating region and an Al and Zn near-surface doping region. This high-quality artificial interphase enhances the structural stability and interfacial dynamics of the cathode as it mitigates the contact loss and continuous side reactions at the cathode/solid electrolyte interface. As a result, our ASSLBs exhibit a high areal capacity (4.65 mAh cm−2), a high specific cathode capacity (203 mAh g−1), superior cycling stability (92% capacity retention after 200 cycles) and a good rate capability (93 mAh g−1 at 2C). This work also offers mechanistic insights into how to break through the limitation of using expensive cathodes (for example, Co-based) and coatings (for example, Nb-, Ta-, La- or Zr-based) while still achieving a high-energy ASSLB performance.
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Data availability
All the data generated and analysed in this study are included in the paper and Supplementary Information. The data that support the plots within this paper are available from the corresponding authors upon reasonable request.
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Acknowledgements
This work was supported by the US–Israel Energy Center programme managed by the US–Israel Binational Industrial Research and Development (BIRD) Foundation. In addition, the project is supported by Champion Motors Ltd, the Science and Engineering Research Board for Ramanujan fellowship (RJN/2020/000075, A.M.) and the Ministry of Science and Technology in Taiwan (MOST 110-2112-M-A49-002-MY3, C.-Y.K.). We acknowledge the support from the Max Planck-POSTECH/Hsinchu Center for Complex Phase Materials.
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L.W., A.M. and M.N. conceived the idea. L.W., A.M. and Z.H. synthesized the materials. L.W., A.M. and R.Y. performed the ALD coating. L.W. and A.M. performed the X-ray diffraction, SEM, STEM and electrochemical measurements. L.W., S.C. and B.L. performed the PFIB measurements. C.-Y.K. and Z.H. carried out the XAS measurements and calculations. L.W., S.H.A., H.A. and D.N. performed the operando Raman measurements. L.W., A.S. and S.T. performed the XPS measurements. C.-Y.K., Z.H., T.-S.C., H.-J.L., J.-F.L. and C.-T.C. helped to analyse the XAS data. A.A.D. and J.W.D. performed the cost estimation of the ASSLB production process including ALD. D.S., X.G., S.B. and P.G.B. provided valuable suggestions to improve this project. L.W., M.N. and D.A. wrote the paper with critical inputs from all other authors. All authors edited and approved the manuscript.
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Wang, L., Mukherjee, A., Kuo, CY. et al. High-energy all-solid-state lithium batteries enabled by Co-free LiNiO2 cathodes with robust outside-in structures. Nat. Nanotechnol. 19, 208–218 (2024). https://doi.org/10.1038/s41565-023-01519-8
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DOI: https://doi.org/10.1038/s41565-023-01519-8