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) 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) Dalian University of Technology Dalian 116024 China
Abstract
AbstractGel polymer electrolytes (GPE) have stimulated the enthusiasm to develop high‐performance quasi‐solid‐state lithium–sulfur (Li–S) batteries, but the incompatibility between non‐polar sulfur cathode and polar GPE has limited its further development. Changing polarity by replacing the non‐polar sulfur cathode to polar organosulfur cathode is expected to improve the cathode‐electrolyte interface compatibility. Inspired by “like compatible like” strategy, a vinyl‐capped hyperbranched polymer network (PEI‐GMA) is developed that serves as a backbone structure for both organosulfur polymer cathode (G/PEI‐GMA@S) and GPE to construct a strong cathode‐electrolyte interface. High interfacial compatibility contributes to accelerating electron/ion conduction for superior transfer kinetics and construction of stable quasi‐solid‐state Li–S batteries. As a result, the internal resistance of the battery is significantly reduced by 60%, and after 400 cycles, the battery capacity retention rate is 91%, with an average decay rate per cycle as low as 0.022%. Meanwhile, the strategy of optimizing both cathodes and electrolytes without design multiple materials makes Li–S batteries more competitive in practical applications. This study emphasizes the importance of moderating relevant polarity for constructing a strong cathode‐electrolyte interface, which provides guiding principles for the electrode and electrolyte design of advanced Li–S batteries.
Funder
Fundamental Research Funds for the Central Universities
Dalian Science and Technology Innovation Fund
National Outstanding Youth Science Fund Project of National Natural Science Foundation of China
Subject
General Materials Science,Renewable Energy, Sustainability and the Environment
Cited by
1 articles.
订阅此论文施引文献
订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献