Abstract
Borohydride solid-state electrolytes with room-temperature ionic conductivity up to ≈70 mS cm<sup>−1</sup> have achieved impressive progress and quickly taken their place among the superionic conductive solid-state electrolytes. Here, the focus is on state-of-the-art developments in borohydride solid-state electrolytes, including their competitive ionic-conductive performance, current limitations for practical applications in solid-state batteries, and the strategies to address their problems. To open, fast Li/Na/Mg ionic conductivity in electrolytes with BH<sub>4</sub> <sup>−</sup> groups, approaches to engineering borohydrides with enhanced ionic conductivity, and later on the superionic conductivity of polyhedral borohydrides, their correlated conductive kinetics/thermodynamics, and the theoretically predicted high conductive derivatives are discussed. Furthermore, the validity of borohydride pairing with coated oxides, sulfur, organic electrodes, MgH<sub>2</sub>, TiS<sub>2</sub>, Li<sub>4</sub>Ti<sub>5</sub>O<sub>12</sub>, electrode materials, etc., is surveyed in solid-state batteries. From the viewpoint of compatible cathodes, the stable electrochemical windows of borohydride solid-state electrolytes, the electrode/electrolyte interface behavior and battery device design, and the performance optimization of borohydride-based solid-state batteries are also discussed in detail. A comprehensive coverage of emerging trends in borohydride solid-state electrolytes is provided and future maps to promote better performance of borohydride SSEs are sketched out, which will pave the way for their further development in the field of energy storage. © 2018 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
| Original language | English |
|---|---|
| Article number | 1803533 |
| Number of pages | 31 |
| Journal | Advanced Materials |
| Volume | 31 |
| Issue number | 1 |
| DOIs | |
| Publication status | Published - 4 Jan 2019 |
| Externally published | Yes |
Bibliographical note
Publication details (e.g. title, author(s), publication statuses and dates) are captured on an “AS IS” and “AS AVAILABLE” basis at the time of record harvesting from the data source. Suggestions for further amendments or supplementary information can be sent to <a href="mailto:[email protected]">[email protected]</a>.Funding
This work was partially supported by the National Key Research andDevelopment Program of China (Grant No. 2017YFA0204600), theNational Science Fund for Distinguished Young Scholars (Grant No.51625102), the National Natural Science Foundation of China (GrantNo. 51471053), the Science and Technology Commission of ShanghaiMunicipality (Grant No. 17XD1400700), and the Hubei Provincial NaturalScience Foundation of China (Grant No. 2018CFB237). Also, financialsupport provided by the Australian Research Council (ARC) (Grant Nos.DP1094261 and FT150100109) is gratefully acknowledged. The authorsthank Dr. Tania Silver for her critical reading of the manuscript.
Research Keywords
- borohydrides
- fast ionic conductors
- solid-state batteries
- solid-state electrolytes
