Kota Motohashi, Hirofumi Tsukasaki, Shigeo Mori, Atsushi Sakuda, Akitoshi Hayashi
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引用次数: 0
Abstract
Developing materials with high sodium-ion conductivities is crucial for improving the electrochemical performance of all-solid-state batteries. Halide solid electrolytes are promising owing to their high conductivity, formability, and oxidation stability. However, state-of-the-art sodium-ion-conducting halides are not as high in conductivity as expected and lack reduction stability. In this study, we report oxychlorides in a ternary system NaCl–TaCl5–Ta2O5 with high conductivities, formabilities, and oxidation and reduction stabilities. The mechanochemically prepared samples are composed of NaCl and Ta2O5 nanoparticles embedded in an Na–Ta–Cl–O amorphous matrix, possessing ionic conductivities of 2.5 × 10–3 S cm–1 at 25 °C and electrochemical potential windows of 0.4–4.1 versus Na+/Na. Compression tests reveal that the nanoparticles in the oxychloride electrolytes improve the mechanical strength. Our findings will facilitate the development of solid electrolytes composed of nanoparticles balanced with high ionic conductivities, formabilities, and electrochemical stabilities.
期刊介绍:
The journal Chemistry of Materials focuses on publishing original research at the intersection of materials science and chemistry. The studies published in the journal involve chemistry as a prominent component and explore topics such as the design, synthesis, characterization, processing, understanding, and application of functional or potentially functional materials. The journal covers various areas of interest, including inorganic and organic solid-state chemistry, nanomaterials, biomaterials, thin films and polymers, and composite/hybrid materials. The journal particularly seeks papers that highlight the creation or development of innovative materials with novel optical, electrical, magnetic, catalytic, or mechanical properties. It is essential that manuscripts on these topics have a primary focus on the chemistry of materials and represent a significant advancement compared to prior research. Before external reviews are sought, submitted manuscripts undergo a review process by a minimum of two editors to ensure their appropriateness for the journal and the presence of sufficient evidence of a significant advance that will be of broad interest to the materials chemistry community.