リチウムイオン電池の代替技術を発見 Study Identifies Alternative to Lithium-based Battery Technology
2022-05-31 ヒューストン大学(UH)
従来よりも高い電流密度で可逆的なナトリウムめっきと剥離を可能にする均質なガラス状電解質を開発しました。
新しい形のオキシサルファイドガラス電解質を発見しました。この電解質は、高エネルギーボールミリングプロセスにより、室温で作製された。
＜関連情報＞
- https://uh.edu/news-events/stories/05312022-sodium-battery.php
- https://www.nature.com/articles/s41467-022-30517-y
全固体ナトリウム電池のための室温で形成される電気化学的に安定な均質なガラス状電解質 An electrochemically stable homogeneous glassy electrolyte formed at room temperature for all-solid-state sodium batteries
Xiaowei Chi,Ye Zhang,Fang Hao,Steven Kmiec,Hui Dong,Rong Xu,Kejie Zhao,Qing Ai,Tanguy Terlier,Liang Wang,Lihong Zhao,Liqun Guo,Jun Lou,Huolin L. Xin,Steve W. Martin & Yan Yao
Nature Communications Published:23 May 2022
DOI:https://doi.org/10.1038/s41467-022-30517-y
Abstract
All-solid-state sodium batteries (ASSSBs) are promising candidates for grid-scale energy storage. However, there are no commercialized ASSSBs yet, in part due to the lack of a low-cost, simple-to-fabricate solid electrolyte (SE) with electrochemical stability towards Na metal. In this work, we report a family of oxysulfide glass SEs (Na3PS4−xOx, where 0 < x ≤ 0.60) that not only exhibit the highest critical current density among all Na-ion conducting sulfide-based SEs, but also enable high-performance ambient-temperature sodium-sulfur batteries. By forming bridging oxygen units, the Na3PS4−xOx SEs undergo pressure-induced sintering at room temperature, resulting in a fully homogeneous glass structure with robust mechanical properties. Furthermore, the self-passivating solid electrolyte interphase at the Na|SE interface is critical for interface stabilization and reversible Na plating and stripping. The new structural and compositional design strategies presented here provide a new paradigm in the development of safe, low-cost, energy-dense, and long-lifetime ASSSBs.
