Polyaniline powder doped with camphorsulfonic acid(PANI-CSA) was dissolved in various organic solvents (NMP, chloroform, trifluoroethyl alcohol, m-cresol, trifluoroacetic acid) to prepare the polymer electrolytes. Tantalum electrolytic capacitors (D4 Size) with small size and high capacitance were fabricated by dip coating in the using the electrolytes as the solutions. Tantalum electrolytic capacitors prepared with PAN-CSA electrolyte dissolved in protic solvent, trifluoroacetic acid, obtained the high capacitance ≤ 82μF at 120 Hz) and low tan 6 (tan δ≤ 14 at 120 Hz). Furthermore, polyaniline electrolyte solution containing surfactant and coupling agent resulted in high capacitance (≤ 104.5 μF at 120 Hz) and low tan 6 (≤ 6.4 at 120 Hz). These phenomena were explained in terms of the electrical conductivity of the electrolyte, the structure and chemical effect (hydrogen bonding, radical addition reaction, coupling bonding, covalent bonding etc.) between the tantalum oxide layer and the electrolyte used.

Camphorsulfonic acid (CSA)로 도핑된 폴리아닐린(PANI-CSA)을 다양한 유기용매(NMP, chloroform, trifluoroethyl alcohol, m-cresol, trifluoroacetic acid)에 녹여 제조한 용약을 전해질로 사용하여 소형이며, 큰 정전용량(capacitance)을 갖는 탄탈륨 전해커페시터(D4 Size)를 제작하였다. 특히, 양성자성 용매인 trifluoroacetic acid에 용해된 PANI-CSA 전해질을 사용한 경우 높은 정전용량(≤ 82 ㎌ at 120 ㎐)과 낮은 손실(tan δ, ≤ 14 at 120 ㎐)값을 얻을 수 있었다. 또한 효율적인 함침율 증가를 위하여 폴리아닐린 전해질에 계명활성제, 커플링제를 첨가하여 높은 정전용량(≤ 104.5 ㎌ at 120 ㎐)과 낮은 손실(tan δ, ≤ 6.4 at 120 ㎐) 값을 얻을 수 있었다. 이러한 현상들을 전해질의 전기전도도 산화된 탄탈륨과 사용된 전해질간의 구조적, 화학적 상호작용(hydrogen bonding, radical addition reaction, coupling bonding, covalent bonding 등)으로 설명하였다.