互穿网络结构导电高分子复合固态电解质的研制与应用

Development and application of conductive polymer composite solid electrolyte with interpenetrating network structure

采用聚四氟乙烯(PTEF)溶液对已形成钽氧化膜(Ta2O5)的Ta多孔体阳极表面进行预处理,在钽阳极微孔内形成具有许多通孔的非导电性高分子互穿网络结构,然后采用化学氧化聚合法,在互穿网络结构的通孔中原位聚合聚3,4-亚乙基二氧噻吩(PEDT)导电高分子聚合物,从而在Ta阳极体表面形成导电性高分子复合柔性固态电解质层。实验结果表明,采用20%体积浓度的PTEF水性分散液,原位聚合PEDT可以在钽阳极表面形成高机械强度的复合固态电解质层,用其制作的钽电解电容器,平均漏电流<15μA,产品的平均等效串联电阻(ESR)值<50mΩ。

Polytetrafluoroethylene(PTEF)solution was used to pretreat the anodic surface of a Ta porous body formed by a tantalum oxide film(Ta 2O 5),and non-conductive polymer interpenetrating network with many through holes was formed in the micro porous of tantalum anode.Then the chemical polymerization method was used to polymerize 3,4-ethylene glycol two oxygen thiophene(PEDT)in the interpenetrating network hole,so a conductive polymer composite flexible solid electrolyte layer is formed on the surface of Ta anode.The experimental results show that use 20%volume of PTEF water dispersions,a composite solid electrolyte layer with high mechanical strength would be coated on the surface of the tantalum anode,The average leakage current of the tantalum electrolytic capacitor is less than 15μA,and the average equivalent series resistance(ESR)value of the product is less than that of 50 mΩ.