Abstract
AbstractThe safety issues oflithium‐ion batteries provoke the development of highly secure solidelectrolytes. Hydride electrolytes owning the high electrochemical stabilityand anode compatibility may sufficiently relieve theconcerns of safety. However, the low ionic conductivity at room temperature hampersits further application. Herein, the strategy of defect‐induced (BH4)– deformation to achieve high ionicconductivity LiBH4/BN composite electrolyte is suggested. The theoreticalcalculations indicate that the volume of the (BH4)– tetrahedron is expanded by 14%. Such atetrahedron deformation weakens the LiH interaction forces in LiBH4, and thus promotes the Li‐ion migration. The LiBH4/BN composites are enabled to deliver lithium ionicconductivity of 1.15 × 10–4 S cm–1 at 40 °C with a Li‐ion transference number of 97%, persuading an excellent solidelectrolyte for all‐solid‐state batteries. The sub‐surface of LiBH4 offers the lowest migration barrier among all possiblechannels, paving the optimal way for Li‐ion migration. Furthermore, the LiBH4/BN electrolytes supply excellent electrochemical stabilityand electrode compatibility. The utilized strategy of outfield induction (notonly defects) and ligand deformation (not only (BH4)–) may also be extended to other solid electrolytes.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.