Slimmed Solvation Structure With Dual‐Interface Regulation for High‐Performance and Safe Lithium‐Sulfur Batteries
Abstract
ABSTRACT A crucial step toward widespread electrochemical energy storage is the design of lithium–sulfur batteries (LSBs) that integrate high energy density with robust safety. Realizing practical LSBs demands an electrolyte that possesses high interfacial stability, excellent ion‐environment regulation capability, and high electrocatalytic activity. Although current electrolyte technologies have improved the cycling performance of LSBs, preparing electrolytes that simultaneously deliver high energy density, high cycling stability, and high safety remains a significant challenge. Here, we report an electrolyte design strategy aimed at achieving high‐performance and high‐safety LSBs. This is primarily accomplished by incorporating symmetric ionic plastic crystals into the electrolyte to construct a slimmed solvation structure (Li + ) regulated by suppression of anion aggregation (S n 2− and TFSI − ) during discharge. The electrolyte exhibits high ionic conductivity, low desolvation energy barrier, high electrocatalytic activity, and interfacial stability. This design acts simultaneously on the cathode and anode interfaces, enabling stable and rapid cycling of LSBs, with high energy density (pouch cell: 704 Wh kg −1 ) and high stability (average capacity decay rate per cycle of 0.018% over 600 cycles). Our solvation structure model design provides a feasible approach for realizing high‐performance and high‐safety LSBs.
Article Details
Authors (12)
Runyue Mao
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)
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)
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)
Zirui Guo
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 China
Naiwen 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)
Boshen Zhang
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 China
Xin Jin
Wenkai Song
Keming Chao
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 China
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)