The role of grain boundaries in solid-state Li-metal batteries

Despite the potential advantages promised by solid-state batteries, the success of solid-state electrolytes has not yet been fully realised. This is due in part to the lower ionic conductivity of solid electrolytes. In many solid superionic conductors, grain boundaries are found to be ionically resi...

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Vydáno v:Materials futures Ročník 2; číslo 1; s. 13501 - 13517
Hlavní autoři: Milan, Emily, Pasta, Mauro
Médium: Journal Article
Jazyk:angličtina
Vydáno: IOP Publishing 01.03.2023
Témata:
glasses
grain boundaries
lithium growth
solid electrolytes
ISSN:2752-5724, 2752-5724
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Shrnutí:Despite the potential advantages promised by solid-state batteries, the success of solid-state electrolytes has not yet been fully realised. This is due in part to the lower ionic conductivity of solid electrolytes. In many solid superionic conductors, grain boundaries are found to be ionically resistive and hence contribute to this lower ionic conductivity. Additionally, in spite of the hope that solid electrolytes would inhibit lithium filaments, in most scenarios their growth is still observed, and in some polycrystalline systems this is suggested to occur along grain boundaries. It is apparent that grain boundaries affect the performance of solid-state electrolytes, however a deeper understanding is lacking. In this perspective, the current theories relating to grain boundaries in solid-state electrolytes are explored, as well as addressing some of the challenges which arise when trying to investigate their role. Glasses are presented as a possible solution to reduce the effect of grain boundaries in electrolytes. Future research directions are suggested which will aid in both understanding the role of grain boundaries, and diminishing their contribution in cases where they are detrimental.
Bibliografie:MF-100100.R1
ISSN:2752-5724
2752-5724
DOI:10.1088/2752-5724/aca703