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- W4386156938 abstract "Abstract Na Super Ionic Conductor (NASICON) materials are an important class of solid-state electrolytes owing to their high ionic conductivity and superior chemical and electrochemical stability. In this paper, we combine first-principles calculations, experimental synthesis and testing, and natural language-driven text-mined historical data on NASICON ionic conductivity to achieve clear insights into how chemical composition influences the Na-ion conductivity. These insights, together with a high-throughput first-principles analysis of the compositional space over which NASICONs are expected to be stable, lead to the successful synthesis and electrochemical investigation of several new NASICONs solid-state conductors. Among these, a high ionic conductivity of 1.2 mS cm −1 could be achieved at 25 °C. We find that the ionic conductivity increases with average metal size up to a certain value and that the substitution of PO 4 polyanions by SiO 4 also enhances the ionic conductivity. While optimal ionic conductivity is found near a Na content of 3 per formula unit, the exact optimum depends on other compositional variables. Surprisingly, the Na content enhances the ionic conductivity mostly through its effect on the activation barrier, rather than through the carrier concentration. These deconvoluted design criteria may provide guidelines for the design of optimized NASICON conductors." @default.
- W4386156938 created "2023-08-26" @default.
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- W4386156938 date "2023-08-25" @default.
- W4386156938 modified "2023-10-14" @default.
- W4386156938 title "Design principles for NASICON super-ionic conductors" @default.
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- W4386156938 doi "https://doi.org/10.1038/s41467-023-40669-0" @default.
- W4386156938 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/37626068" @default.
- W4386156938 hasPublicationYear "2023" @default.
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