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首页> 外文期刊>ACS Macro Letters >Ionically Cross-Linked Polymers as Asymmetric Gel Polymer Electrolytes for Enhanced Cycle Performance of Lithium–Sulfur Batteries
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Ionically Cross-Linked Polymers as Asymmetric Gel Polymer Electrolytes for Enhanced Cycle Performance of Lithium–Sulfur Batteries

机译：离子交联聚合物作为不对称凝胶聚合物电解质，用于增强锂 - 硫电池的循环性能

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摘要

Two thermoplastic triblock copolymers of poly(ε-caprolactone)-based acidic (PCL-A) and basic (PCL-B) polymers are synthesized by atom transfer radical polymerization. PCL-A and PCL-B are sequentially electrospun on a sulfur electrode and then ionically cross-linked by an acid–base reaction via hot pressing at 70 °C, which is confirmed by infrared (IR) spectroscopy. The cross-linked PCL-A/PCL-B-electrospun sulfur electrode is assembled as a lithium–sulfur battery with an asymmetric gel polymer electrolyte. The cross-linked polymer is swollen by a liquid electrolyte to form an asymmetric gel polymer electrolyte. The cyclic voltammetry results indicate that the asymmetric gel polymer electrolyte can suppress the dissolution of lithium polysulfides (Li_(2)S_(n )) into the electrolyte. Furthermore, the lithium–sulfur battery with the asymmetric gel polymer electrolyte exhibits enhanced cycle-life performance.
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