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OALib Journal期刊
ISSN: 2333-9721
费用：99美元
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磺化聚酰亚胺酸碱复合膜的制备及其在全钒液流电池中的应用
DOI: 10.11777/j.issn1000-3304.2015.14310, PP. 418-426
Keywords: 磺化聚酰亚胺,酸碱复合膜,全钒氧化还原液流电池,钒离子渗透率,电池效率
Abstract:
采用高温一步法合成了一系列不同磺化度的三元共聚磺化聚酰亚胺(SPI),通过控制磺化二胺与非磺化二胺的摩尔比来调节磺化度.选取碱性聚合物聚乙烯吡咯烷酮(PVP)与SPI按质量比19进行共混,制成SPI/PVP酸碱复合膜.对复合膜的吸水率、离子交换容量、钒离子渗透率以及电池性能进行了测试.结果表明,随着磺化度的升高,复合膜的吸水率、离子交换容量、质子电导率升高以及钒离子渗透率升高.复合膜的隔膜选择性比Nafion117的选择性好,其中SPI/PVP-3的选择性是Nafion117的10倍.电池性能测试表明,随磺化度的升高,复合膜能量效率升高.其中SPI/PVP-3膜较Nafion117膜具有较高的库伦效率和能量效率,通过循环测试SPI/PVP-3膜性能稳定,充放电理想.
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