Interface Engineered Electrolyte Design Strategy for Ultralong‐Cycle Solid‐State Lithium Batteries Over Wide Temperature Range
Abstract
Abstract Achieving stable operation under a wide temperature range is the direction of development for the practical application of solid‐state lithium batteries. However, the suboptimal ionic conductive properties exhibited by the electrolyte, the uncontrolled growth of lithium dendrites due to the deposition of inhomogeneous Li + and the potential safety hazards caused by unstable interfaces have seriously affected the cycle life of the battery at extreme temperatures. Herein, a fluoropolymer‐containing plastic‐crystal‐based electrolyte (FPCE) has been developed by means of a structural engineering process, with the objective of optimizing the solid electrolyte interface (SEI). The integration of solvent structure simulation and experimental results demonstrates that FPCE regulates Li + transport, promotes the in‐situ formation of the LiF‐rich inorganic–organic hybrid SEI, and enhances the overall stability of the battery. Consequently, FPCE assists in preserving stable LFP|FPCE|Li cells cycling, with 5000 cycles at a high current density of 10 C and an average capacity decay rate of merely 0.00448% per cycle. Furthermore, the Ah‐level pouch cells demonstrate the capacity to operate stably within the temperature range of −10 to 80 °C. This study provides a valuable strategy for the design of wide‐temperature solid‐state polymer electrolytes.
Article Details
Authors (13)
Yunpeng Qu
School of Materials Science and Engineering, State Key Laboratory of Fine Chemicals, Frontiers Science Center for Smart Materials Oriented Chemical Engineering, Technology Innovation Center of High Performance Resin Materials (Liaoning Province)
Chang Su
School of Materials Science and Engineering, State Key Laboratory of Fine Chemicals, Frontiers Science Center for Smart Materials Oriented Chemical Engineering, Technology Innovation Center of High Performance Resin Materials (Liaoning Province)
Lin Wang
Borui Li
School of Materials Science and Engineering, State Key Laboratory of Fine Chemicals, Frontiers Science Center for Smart Materials Oriented Chemical Engineering, Technology Innovation Center of High Performance Resin Materials (Liaoning Province)
Wanyuan Jiang
State Key Laboratory of Fine Chemicals, Frontiers Science Center for Smart Materials Oriented Chemical Engineering, School of Chemical Engineering, Technology Innovation Center of High Performance Resin Materials (Liaoning Province)
Runyang Li
School of Materials Science and Engineering, State Key Laboratory of Fine Chemicals, Frontiers Science Center for Smart Materials Oriented Chemical Engineering, Technology Innovation Center of High Performance Resin Materials (Liaoning Province) Dalian University of Technology Dalian 116024 China
Mengfan Pei
School of Materials Science and Engineering, State Key Laboratory of Fine Chemicals, Frontiers Science Center for Smart Materials Oriented Chemical Engineering, Technology Innovation Center of High Performance Resin Materials (Liaoning Province)
Wenkai Song
Shuo Zhuo
School of Materials Science and Engineering, State Key Laboratory of Fine Chemicals, Frontiers Science Center for Smart Materials Oriented Chemical Engineering, Technology Innovation Center of High Performance Resin Materials (Liaoning Province)
Xin Jin
Dongming Liu
School of Materials Science and Engineering, State Key Laboratory of Fine Chemicals, Frontiers Science Center for Smart Materials Oriented Chemical Engineering, Technology Innovation Center of High Performance Resin Materials (Liaoning Province)
Xigao Jian
School of Materials Science and Engineering, State Key Laboratory of Fine Chemicals, Frontiers Science Center for Smart Materials Oriented Chemical Engineering, Technology Innovation Center of High Performance Resin Materials (Liaoning Province)
Fangyuan Hu
School of Materials Science and Engineering, State Key Laboratory of Fine Chemicals, Frontiers Science Center for Smart Materials Oriented Chemical Engineering, Technology Innovation Center of High Performance Resin Materials (Liaoning Province)