Double-edged effects of electrolyte additive on interfacial stability in fast-charging lithium-ion batteries

Hyuntae Lee, Junyoung Doh, Soyeon Lee, Dohyun Sung, Hang Kim, Sujong Chae , Hongkyung Lee 

Chemical Communications 60.89 (2024): 13044-13047.

Essential, but not too much—Roles of electrolyte additive (FEC) in Li+ solvation structures and interfacial reactions are revealed in a high-concentration electrolyte. While excessive FEC addition can intervene in original Li+ solvation, compromising interfacial kinetics, minimal FEC is essential in fast-charging applications to seamlessly facilitate Li+ desolvation while reinforcing interfacial stability.

This work reveals the ‘double-edged’ roles of additives in high-concentration electrolytes, forming ’Goldilocks-balanced’ solid electrolyte interphases for fast-rechargeable Li-ion batteries.

https://doi.org/10.1039/d4cc04026k