膜
材料科学
乙烯醇
聚合物
电解质
化学工程
高分子化学
离子电导率
丙烯酸
差示扫描量热法
聚电解质
单体
复合材料
化学
电极
物理化学
工程类
物理
热力学
生物化学
作者
G.M. Wu,Syh‐Jae Lin,Chen-Chi Yang
标识
DOI:10.1016/j.memsci.2005.09.012
摘要
Solid polymer electrolyte (SPE) membranes with varying composition ratios were prepared from poly(vinyl alcohol) (PVA) and poly(acrylic acid) (PAA). The acrylic acid monomer with cross-linker was first blended with PVA polymer. A free radical polymerization was then carried out to form an alkaline polymer electrolyte. The solution casting method was used to form the solid polymer membranes. The solid polymer membranes were then immersed in 32 wt.% KOH solution to form different types of electrolyte, and the characteristic properties were examined with ac impedance, differential scanning calorimetry (DSC), stress–strain test, X-ray diffraction (XRD) and SEM morphology analysis. The results showed that the highest room temperature ionic conductivity for the PVA/PAA/KOH solid polymer membrane electrolyte system was 0.301 S cm−1, which is a four-fold increase from that of the PVA–KOH electrolyte. These PVA/PAA composite polymer membranes also exhibited excellent thermal and mechanical properties. The membranes were stable for a wide temperature range. The PVA/PAA polymer membrane had good mechanical strength and ductility and would be a suitable polymer membrane electrolyte for the alkaline batteries and other electrochemical systems.
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