基于高比容钽粉的聚合物片式电容器制备工艺研究

针对比容为50000～70000μF.V/g的较高比容钽粉,研究了导电聚合物聚3,4-乙烯基二氧噻吩(PE-DOT)作为阴极材料的有机片式固体钽电解电容器的制备工艺,通过调整阳极体制备及阴极被覆工艺等参数实现了PEDOT在高比容钽块表面的有效被覆,获得了各项性能参数良好的聚合物片式钽电解电容器。重点研究了压制密度、形成电流密度等参数及分段被膜工艺对聚合物片式固体钽电容器容量引出、等效串联电阻、漏电流等性能的影响,并讨论了相应的电容器工作机理。

Investigation of Production Process of Polymer Solid Electrolyte Tantalum Capacitor Based on High Specific Surface Area Tantalum Powder

The fabrication process of polymer solid-electrolyte tantalum capacitor employing high capacitance tantalum powder of 50000~70000μF·V/g as anode material was investigated.The optimized fabrication process for tantalum powder pellet anode and cathode film deposition process was explored,and the obtained polymer solid-electrolyte tantalum capacitor exhibited excellent electronic performance.The influence of fabrication parameter such as pressing density,current density of Ta2O5 film formation and stepwise-deposition process of cathode film on capacitor performance such as capacitance,equivalent series resistance(ESR),leakage current were studied in detail.Moreover,the discussion of working mechanism about polymer solid-electrolyte tantalum capacitor was included.