Solvent Anchored Electrolytes for Lithium‐Ion Batteries Working at High Voltage and Wide Temperature
Abstract
ABSTRACT Lithium‐ion batteries (LIBs) suffer from severe performance fading under coupled conditions of high voltage and wide temperature because cold retards Li + migration and desolvation kinetics while heat or high voltage exacerbates parasitic reactions and electrode destabilization. Herein, we propose a solvent‐anchored paradigm for electrolyte design via electrostatic potential matching to enable stable battery operation across the demanding voltage‐temperature matrix. The fine‐tuned electrolyte, which is composed of well‐matched dimethyltrifluoroacetamide solvent and fluorotoluene diluent, features a site‐specific solvation structure with anion‐dominated inner shell and solvent‐anchored outer cluster. This unique configuration facilitates fast Li + desolvation and robust interphase formation on both the lithium/graphite anode and LiCoO 2 cathode. Remarkably, the formulated electrolyte enables stable operation of graphite||LiCoO 2 full cells up to a charging voltage of 4.5 V from −60°C to 80°C, indicating its promising applicability to fortify LIB performance under harsh conditions.
Article Details
Authors (10)
Linlin Xue
State Key Laboratory of Advanced Chemical Power Sources, Frontiers Science Center for New Organic Matter (Ministry of Education), Engineering Center on High-efficiency Energy Storage (Ministry of Education), College of Chemistry
Meng Yao
State Key Laboratory of Advanced Chemical Power Sources, Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education), Engineering Research Center of High-efficiency Energy Storage (Ministry of Education), Frontiers Science Center for New Organic Matter (Ministry of Education), College of Chemistry
Yiyang Peng
Beijing National Laboratory for Molecular Science, State Key Laboratory of Rare Earth Materials Chemistry and Applications, College of Chemistry and Molecular Engineering
Yue Li
Yang Dong
State Key Laboratory of Advanced Chemical Power Sources, Frontiers Science Center for New Organic Matter (Ministry of Education), Engineering Center on High-efficiency Energy Storage (Ministry of Education), College of Chemistry
Libo Song
Frontiers Science Center for New Organic Matter, State Key Laboratory of Advanced Chemical Power Sources, Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education), Academy of Advanced Inter Disciplinary Studies, College of Chemistry
Fengming Zhang
State Key Laboratory of Advanced Chemical Power Sources, Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education), Engineering Research Center of High-efficiency Energy Storage (Ministry of Education), Frontiers Science Center for New Organic Matter (Ministry of Education), College of Chemistry
Kai Zhang
Meng Yu
State Key Laboratory of Advanced Chemical Power Sources, Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education), Engineering Research Center of High-efficiency Energy Storage (Ministry of Education), Frontiers Science Center for New Organic Matter (Ministry of Education), College of Chemistry
Fangyi Cheng
State Key Laboratory of Advanced Chemical Power Sources, Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education), Engineering Research Center of High-efficiency Energy Storage (Ministry of Education), Frontiers Science Center for New Organic Matter (Ministry of Education), College of Chemistry