Toward Long‐Life High‐Voltage Aqueous Li‐Ion Batteries: from Solvation Chemistry to Solid‐Electrolyte‐Interphase Layer Optimization Against Electron Tunneling Effect DOI
Insu Jeong, Sungho Kim,

Youngbi Kim

et al.

Advanced Materials, Journal Year: 2024, Volume and Issue: unknown

Published: Dec. 27, 2024

Abstract Water is pursued as an electrolyte solvent for its non‐flammable nature compared to traditional organic solvents, yet narrow electrochemical stability window (ESW) limits performance. Solvation chemistry design widely adopted the key suppress reactivity of water, thereby expanding ESW. In this study, acetamide‐based ternary eutectic achieved ESW ranging from 1.4 5.1 V. The confines water molecules within primary solvation sheath Li‐ions, reducing free and breaking hydrogen bond network. Despite this, initial capacity retention suboptimal due inadequate formation solid‐electrolyte‐interphase (SEI) layers. To address additional evolution reaction induced by widening operation voltage range, optimizing SEI layer mitigate electron tunneling effect. This approach resulted in a denser LiF‐rich layer, effectively preventing decomposition improving long‐term cycle stability. optimized reduced barrier, achieving discharge 152 mAh g −1 at 1 C maintaining 76% (116 ) after 1000 cycles. study highlights critical role both structure optimization enhancing performance high‐voltage aqueous Li‐ion batteries.

Language: Английский

Toward Long‐Life High‐Voltage Aqueous Li‐Ion Batteries: from Solvation Chemistry to Solid‐Electrolyte‐Interphase Layer Optimization Against Electron Tunneling Effect DOI
Insu Jeong, Sungho Kim,

Youngbi Kim

et al.

Advanced Materials, Journal Year: 2024, Volume and Issue: unknown

Published: Dec. 27, 2024

Abstract Water is pursued as an electrolyte solvent for its non‐flammable nature compared to traditional organic solvents, yet narrow electrochemical stability window (ESW) limits performance. Solvation chemistry design widely adopted the key suppress reactivity of water, thereby expanding ESW. In this study, acetamide‐based ternary eutectic achieved ESW ranging from 1.4 5.1 V. The confines water molecules within primary solvation sheath Li‐ions, reducing free and breaking hydrogen bond network. Despite this, initial capacity retention suboptimal due inadequate formation solid‐electrolyte‐interphase (SEI) layers. To address additional evolution reaction induced by widening operation voltage range, optimizing SEI layer mitigate electron tunneling effect. This approach resulted in a denser LiF‐rich layer, effectively preventing decomposition improving long‐term cycle stability. optimized reduced barrier, achieving discharge 152 mAh g −1 at 1 C maintaining 76% (116 ) after 1000 cycles. study highlights critical role both structure optimization enhancing performance high‐voltage aqueous Li‐ion batteries.

Language: Английский

Citations

0