Print Email Facebook Twitter Quantification of the Li-ion diffusion over an interface coating in all-solid-state batteries via NMR measurements Title Quantification of the Li-ion diffusion over an interface coating in all-solid-state batteries via NMR measurements Author Liu, M. (TU Delft RST/Storage of Electrochemical Energy) Wang, C. (TU Delft RST/Storage of Electrochemical Energy) Zhao, C. (TU Delft RST/Storage of Electrochemical Energy; Tsinghua University) van der Maas, E.L. (TU Delft RST/Storage of Electrochemical Energy) Lin, Kui (Tsinghua University) Arszelewska, Violetta (TU Delft RST/Storage of Electrochemical Energy) Li, Baohua (Tsinghua University) Ganapathy, S. (TU Delft RID/TS/Instrumenten groep) Wagemaker, M. (TU Delft RST/Storage of Electrochemical Energy) Date 2021 Abstract A key challenge for solid-state-batteries development is to design electrode-electrolyte interfaces that combine (electro)chemical and mechanical stability with facile Li-ion transport. However, while the solid-electrolyte/electrode interfacial area should be maximized to facilitate the transport of high electrical currents on the one hand, on the other hand, this area should be minimized to reduce the parasitic interfacial reactions and promote the overall cell stability. To improve these aspects simultaneously, we report the use of an interfacial inorganic coating and the study of its impact on the local Li-ion transport over the grain boundaries. Via exchange-NMR measurements, we quantify the equilibrium between the various phases present at the interface between an S-based positive electrode and an inorganic solid-electrolyte. We also demonstrate the beneficial effect of the LiI coating on the all-solid-state cell performances, which leads to efficient sulfur activation and prevention of solid-electrolyte decomposition. Finally, we report 200 cycles with a stable capacity of around 600 mAh g−1 at 0.264 mA cm−2 for a full lab-scale cell comprising of LiI-coated Li2S-based cathode, Li-In alloy anode and Li6PS5Cl solid electrolyte. Subject OA-Fund TU Delft To reference this document use: http://resolver.tudelft.nl/uuid:90caa250-478c-43d3-a1b5-dea587f8d6c0 DOI https://doi.org/10.1038/s41467-021-26190-2 ISSN 2041-1723 Source Nature Communications, 12 (1) Part of collection Institutional Repository Document type journal article Rights © 2021 M. Liu, C. Wang, C. Zhao, E.L. van der Maas, Kui Lin, Violetta Arszelewska, Baohua Li, S. Ganapathy, M. Wagemaker Files PDF s41467_021_26190_2.pdf 3.26 MB Close viewer /islandora/object/uuid:90caa250-478c-43d3-a1b5-dea587f8d6c0/datastream/OBJ/view