Journal of the Ceramic Society of Japan
Online ISSN : 1348-6535
Print ISSN : 1882-0743
ISSN-L : 1348-6535
Mechanochemical synthesis of cubic rocksalt Na2TiS3 as novel active materials for all-solid-state sodium secondary batteries
Akira NASUMisae OTOYAMAAtsushi SAKUDAAkitoshi HAYASHIMasahiro TATSUMISAGO
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JOURNALS FREE ACCESS Advance online publication

Article ID: 19086

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Abstract

Mechanochemical (MC) process is one of the most effective methods to produce amorphous and cation disordered electrode active materials. We individually synthesized amorphous and cation disordered cubic rocksalt Na2TiS3 by controlling the preparation conditions of the MC process. Cubic rocksalt Na2TiS3 and ordered monoclinic Na2TiS3 were also obtained via the heat treatment of amorphous Na2TiS3. The all-solid-state cell with cubic rocksalt Na2TiS3 showed a high reversible capacity of 270 mAh g−1, which corresponds to the theoretical capacity of Na2TiS3. The cell maintained the capacity for more than 30 cycles, indicating that the active materials can endure long operation life. The MC methods for transition metal sulfides and the search for ordered monoclinic polymorphs are necessary for the pursuit of novel electrode materials.

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