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Design principles for sodium superionic conductors.


ABSTRACT: Motivated by the high-performance solid-state lithium batteries enabled by lithium superionic conductors, sodium superionic conductor materials have great potential to empower sodium batteries with high energy, low cost, and sustainability. A critical challenge lies in designing and discovering sodium superionic conductors with high ionic conductivities to enable the development of solid-state sodium batteries. Here, by studying the structures and diffusion mechanisms of Li-ion versus Na-ion conducting solids, we reveal the structural feature of face-sharing high-coordination sites for fast sodium-ion conductors. By applying this feature as a design principle, we discover a number of Na-ion conductors in oxides, sulfides, and halides. Notably, we discover a chloride-based family of Na-ion conductors NaxMyCl6 (M = La-Sm) with UCl3-type structure and experimentally validate with the highest reported ionic conductivity. Our findings not only pave the way for the future development of sodium-ion conductors for sodium batteries, but also consolidate design principles of fast ion-conducting materials for a variety of energy applications.

SUBMITTER: Wang S 

PROVIDER: S-EPMC10665354 | biostudies-literature | 2023 Nov

REPOSITORIES: biostudies-literature

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Design principles for sodium superionic conductors.

Wang Shuo S   Fu Jiamin J   Liu Yunsheng Y   Saravanan Ramanuja Srinivasan RS   Luo Jing J   Deng Sixu S   Sham Tsun-Kong TK   Sun Xueliang X   Mo Yifei Y  

Nature communications 20231122 1


Motivated by the high-performance solid-state lithium batteries enabled by lithium superionic conductors, sodium superionic conductor materials have great potential to empower sodium batteries with high energy, low cost, and sustainability. A critical challenge lies in designing and discovering sodium superionic conductors with high ionic conductivities to enable the development of solid-state sodium batteries. Here, by studying the structures and diffusion mechanisms of Li-ion versus Na-ion con  ...[more]

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