Affiliation:
1. 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) Key Laboratory of Energy Materials and Devices (Liaoning Province) Dalian University of Technology Dalian 116024 China
2. 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) Key Laboratory of Energy Materials and Devices (Liaoning Province) Dalian University of Technology Dalian 116024 China
Abstract
AbstractThe commercial application of lithium–sulfur (Li–S) batteries is severely impeded by abominable shuttle effects, sluggish redox kinetics, and poor safety performance under high loading conditions. Herein, a novel adsorption‐mediator synergistic polymer binder (PAT) is reported to regulate the conversion of lithium polysulfides (LiPSs) through close intermolecular synergy. The abundant polar groups provide strong anchor ability for LiPSs to effectively inhibit the shuttle effect, and the anchored LiPSs are accelerated by adjacent mediator catalytic sites to facilitate their redox kinetics. Moreover, PAT itself features excellent flame retardant properties, which effectively enhance the safety performance of Li–S cells. Benefiting from these attributes, PAT‐based Li–S cells exhibit outstanding rate performance with an average capacity of 617.34 mAh g−1 at 5 C and excellent cycling stability maintaining a capacity of 629.1 mAh g−1 after 800 cycles at 2 C. Even under the harsh conditions of high loading (9.84 mg cm−2) and lean electrolyte (E/S = 3.56 µL mg−1), PAT‐based cell delivers a high average areal capacity of 9.58 mAh cm−2 and an ultralow overpotential of 3 mV, confirming the application potential of adsorption‐mediator synergistic polymer binder in high performance Li–S batteries.
Funder
Fundamental Research Funds for the Central Universities
Subject
Electrochemistry,Condensed Matter Physics,Biomaterials,Electronic, Optical and Magnetic Materials
Cited by
2 articles.
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