The shield-like nano-sized Si3N4 derivatives to defend against the attack of lithium dendrites.
J Colloid Interface Sci
; 652(Pt A): 50-56, 2023 Dec 15.
Article
en En
| MEDLINE
| ID: mdl-37591083
ABSTRACT
The unrestrained Li dendrite growth impedes the performance of Li metal batteries (LMBs) and brings safety concerns. To mitigate the unfavorable effect of Li dendrites, in this work, a shield-like artificial interlayer composed of Si3N4 is employed to achieve the desirable electrochemical performance of LMBs. The Si3N4-based interlayer can in-situ electrochemically react with Li to generate inorganic Li3N and LixSi alloys the former with high ionic conductivity can effectively enhance the Li+ transference, while the latter with reversibility for Li+ insertion/deinsertion can act as Li+ reservoir to modulate Li+ platting/stripping. Thus, the Si3N4-derived compound shield effectively defends against the attack of Li dendrites and suppresses their growth, with which the Li||Li cells can cycle at 1 mA cm-2 (1 mAh cm-2) up to 500 h and the LiFePO4 (LFP) ||Li batteries can operate 400 cycles at 1C with 91.5 % capacity retention.
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1
Colección:
01-internacional
Base de datos:
MEDLINE
Idioma:
En
Revista:
J Colloid Interface Sci
Año:
2023
Tipo del documento:
Article
País de afiliación:
China