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Breaking solvation dominance of ethylene carbonate via molecular charge engineering enables lower temperature battery

Engineering and Technology

Breaking solvation dominance of ethylene carbonate via molecular charge engineering enables lower temperature battery

Y. Chen, Q. He, et al.

Explore the groundbreaking research by Yuqing Chen and colleagues that reveals a modified electrolyte designed to enhance lithium-ion battery performance at frigid temperatures. With remarkable ionic conductivity at -90 °C and unmatched functionality around -100 °C, this innovation could transform battery technology in extreme conditions.

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Playback language: English
Abstract
Low temperatures significantly hinder lithium-ion battery performance. This research introduces a modified electrolyte that addresses this by tailoring the solvation structure to reduce Li⁺-solvent interactions. This is achieved through electronegativity regulation of the carbonyl oxygen in ethylene carbonate, a common electrolyte component. The modified electrolyte exhibits high ionic conductivity (1.46 mS cm⁻¹) at -90 °C and remains liquid at -110 °C. Graphite-based pouch cells using this electrolyte demonstrate exceptional performance at low temperatures, maintaining functionality even at approximately -100 °C.
Publisher
Nature Communications
Published On
Dec 14, 2023
Authors
Yuqing Chen, Qiu He, Yun Zhao, Wang Zhou, Peitao Xiao, Peng Gao, Naser Tavajohi, Jian Tu, Baohua Li, Xiangming He, Lidan Xing, Xiulin Fan, Jilei Liu
Tags
lithium-ion batteries
low temperature performance
modified electrolyte
ionic conductivity
solvation structure
battery technology
carbonyl oxygen

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