Ester-Guided Dynamic Li+ Solvation Enables Plating-Less, Fast-Charging Li-Ion Batteries DOI
Soyeon Lee,

Hyuntae Lee,

Hongjun Chang

et al.

ACS Nano, Journal Year: 2025, Volume and Issue: unknown

Published: April 18, 2025

The extremely fast charging (XFC) of Li-ion cells is an urgent milestone in promoting the widespread adoption electric vehicles. However, EV-targeted cell designs with thicker electrodes compromise XFC capability when conventional electrolytes are used, leading to hazardous Li plating and a considerable loss inventory. This study presents noncarbonate solvents for superionic conductive, low-viscosity high-concentration (HCEs). A methyl acetate (MA)-based HCE solid-electrolyte interphase (SEI)-stabilizing additive (3MF) was comparatively examined using dimethyl carbonate (DMC) solvent, which has extra oxygen atom molecule, across all aspects, including solvation structures, interfacial kinetics, bulk Li+ transport. 3MF electrolyte demonstrated outstanding performance pouch (1.2 Ah) format outperformed DMC-based HCE, showcasing improved cycling at low temperatures (-20 °C), 10 C-rate (6-min charging), thick electrode (6.0 mAh cm-2). By satisfying energy barrier thresholds desolvation migration SEI, MA can guide smaller clusters serve as molecular lubricant along percolation pathway framework, crucial boosting capabilities.

Language: Английский

Geometric Design of Interface Structures and Electrolyte Solvation Chemistry for Fast Charging Lithium‐Ion Batteries DOI Open Access
Chaeeun Song, Seung Hee Han, Youngwoo Choi

et al.

Advanced Materials, Journal Year: 2025, Volume and Issue: unknown

Published: March 11, 2025

Abstract The grain sizes of solid electrolyte interphase (SEI) and solvation structure electrolytes can affect Li + ion transport across SEI control the desolvation kinetics solvated ions during fast‐charging Li‐ion batteries (LIBs). However, impact geometric grains on fast charging capability LIBs is rarely examined. Here, correlation between size characteristics cells explored, controlled by replacing strongly binding ethylene carbonate (EC) solvent with a weakly nitrile‐based under conditions. evolution small to provide sufficient paths for supply be achieved modification in electrolyte. Additionally, less resistive composition low viscosity isoBN‐containing enable more rapid LiNi 0.8 Co 0.1 Mn O 2 /graphite full facilitating crossing plating at rate 4 C 25 °C. This work sheds light interface engineering enhance cycle stability tailorable adoption transportation sectors.

Language: Английский

Citations

0
Ester-Guided Dynamic Li+ Solvation Enables Plating-Less, Fast-Charging Li-Ion Batteries DOI
Soyeon Lee,

Hyuntae Lee,

Hongjun Chang

et al.

ACS Nano, Journal Year: 2025, Volume and Issue: unknown

Published: April 18, 2025

The extremely fast charging (XFC) of Li-ion cells is an urgent milestone in promoting the widespread adoption electric vehicles. However, EV-targeted cell designs with thicker electrodes compromise XFC capability when conventional electrolytes are used, leading to hazardous Li plating and a considerable loss inventory. This study presents noncarbonate solvents for superionic conductive, low-viscosity high-concentration (HCEs). A methyl acetate (MA)-based HCE solid-electrolyte interphase (SEI)-stabilizing additive (3MF) was comparatively examined using dimethyl carbonate (DMC) solvent, which has extra oxygen atom molecule, across all aspects, including solvation structures, interfacial kinetics, bulk Li+ transport. 3MF electrolyte demonstrated outstanding performance pouch (1.2 Ah) format outperformed DMC-based HCE, showcasing improved cycling at low temperatures (-20 °C), 10 C-rate (6-min charging), thick electrode (6.0 mAh cm-2). By satisfying energy barrier thresholds desolvation migration SEI, MA can guide smaller clusters serve as molecular lubricant along percolation pathway framework, crucial boosting capabilities.

Language: Английский

Citations

0