聚丙烯腈
电解质
膜
化学工程
阳极
纳米纤维
材料科学
电化学
无机化学
聚合物
化学
电极
纳米技术
复合材料
生物化学
工程类
物理化学
作者
Du‐Hyun Lim,Marco Agostini,Jou‐Hyeon Ahn,Aleksandar Matic
标识
DOI:10.1002/ente.201800170
摘要
Abstract We report on the synthesis and characterization of an electrospun gel polymer electrolyte (GPE) membrane based on polyacrylonitrile nanofibers (PAN) swollen in a polyethylene glycol dimethyl ether/Na‐salt electrolyte solution, for application in room temperature sodium–sulfur (Na–S) batteries. The membranes show a high ionic conductivity, wide electrochemical stability window, and good thermal stability. We demonstrate the performance of the membrane in an Na–S cell using a sulfur–carbon nanotubes composite cathode and Na metal as anode. Our results show that the GPE membrane stabilizes the Na metal anode resulting in stable cycling behavior. The capacity of the Na–S cell, using the GPE membrane and operating at room temperature, is approximately 500 mAh g −1 over 40 cycles. The selected electrolyte configuration also provides improved safety by replacing the highly reactive sodium perchlorate (NaClO 4 ) salt previously used in literature. All these benefits make the gel‐polymer electrolyte membrane a very promising system for application in room‐temperature sodium and sodium–sulfur batteries.
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