Journal
ENERGY STORAGE MATERIALS
Volume 25, Issue -, Pages 782-794Publisher
ELSEVIER
DOI: 10.1016/j.ensm.2019.08.032
Keywords
All-solid-state batteries; Solid electrolyte; Hydroborates; Closo-borates
Funding
- Swiss National Science Foundation (SNFS) [CRSII2_160749/1]
- InnoSuisse through funding for the Swiss Competence Center for Energy Research (SCCER) Heat and Electricity Storage [1155-002545]
- Swiss National Science Foundation (SNF) [CRSII2_160749] Funding Source: Swiss National Science Foundation (SNF)
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Hydroborates represent a promising, yet underexplored, class of electrolytes for all-solid-state batteries. This article reviews the rapid recent developments that enabled the demonstration of first all-solid-state batteries based on hydroborate electrolytes with remarkable cycling stability. High-ionic conductivity, a wide electrochemical stability window, and advantageous mechanical properties make hydroborate electrolytes serious candidates for addressing the major device integration and processing challenges faced by all-solid-state batteries. We also discuss novel approaches for the synthesis of hydroborate compounds from cost-effective feedstock chemicals with low toxicity. Finally, we provide an up-to-date assessment of the key performance metrics of hydroborate electrolytes in comparison to other more established solid electrolyte materials and discuss future research opportunities in the field.
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