Dual‐Domain Coupling‐Driven Interface Remodeling Enables Ultra‐Dilute Flame‐Retardant Electrolytes for High‐Voltage, Wide‐Temperature Batteries
Abstract
ABSTRACT The paradigm shift in electrolyte research is a critical driver for performance breakthroughs in sustainable batteries under extreme conditions. Ultra‐dilute electrolytes (UDEs) have attracted extensive attention due to their remarkable cost advantages and broad application prospects, yet excess free solvents cause trade‐offs among high‐voltage stability, wide‐temperature adaptability, longevity, and safety. In this work, we propose a dual‐domain coupling‐driven interface remodeling strategy to tailor bulk solvation and interfacial microenvironments via integrating hierarchically‐solvated carbonate ester, ether, and fluorinated cyclophosphazene. The designed UDE (0.05 M) features a more flexible solvation configuration with less restricted ion transport; concurrently, electric double layers on both electrode surfaces are regulated through molecular competitive adsorption and decomposition under electric field induction. Consequently, cross‐scale microenvironment remodeling is realized to essentially overcome the existing performance limitations. The UDE not only exhibits intrinsic flame retardancy but also significantly improves electrode compatibility (phosphate and oxide cathodes, metal anode) through a bidirectional interface stabilization mechanism. Remarkably, Na 0.67 Ni 0.33 Mn 0.67 O 2 cathode achieves desirable durability over a wide temperature range (−40∼70°C). Furthermore, this strategy is extended to potassium‐ion batteries, enabling stable operation of KVPO 4 F cathode at 4.95 V. This work establishes a universal framework for multi‐scale interfacial molecular engineering, offering a promising advancement in extreme energy storage technologies.
Article Details
Authors (11)
Zhen‐Yi Gu
MOE Key Laboratory For UV Light‐Emitting Materials and Technology Northeast Normal University Changchun Jilin P. R. China
Yong‐Li Heng
State Key Laboratory of Integrated Optoelectronics, and MOE Key Laboratory For UV Light‐Emitting Materials and Technology Department of Physics Northeast Normal University Changchun Jilin P. R. China
Xiao‐Tong Wang
MOE Key Laboratory For UV Light‐Emitting Materials and Technology Northeast Normal University Changchun Jilin P. R. China
Shuo‐Hang Zheng
State Key Laboratory of Integrated Optoelectronics, and MOE Key Laboratory For UV Light‐Emitting Materials and Technology Department of Physics Northeast Normal University Changchun Jilin P. R. China
Zhong‐Hui Sun
State Key Laboratory of Integrated Optoelectronics, and MOE Key Laboratory For UV Light‐Emitting Materials and Technology Department of Physics Northeast Normal University Changchun Jilin P. R. China
Yi Wu
Yue Liu
Jie Wang
State Key Laboratory of Molecular Oncology, Beijing Key Laboratory, CAMS Key Laboratory of Translational Research on Lung Cancer, Department of Medical Oncology Cancer Hospital, Chinese Academy of Medical Sciences Beijing China
Yuan‐Zheng Tang
Qingdao University of Science and Technology Qingdao Shandong P. R. China
Shu‐Yu Li
Department of Chemistry Northeast Normal University Changchun Jilin P. R. China
Xing‐Long Wu
MOE Key Laboratory For UV Light‐Emitting Materials and Technology Northeast Normal University Changchun Jilin P. R. China