تهيه فوتوالكترودهاي بر پايه تيتانيوم دي اكسيد اصلاح شده با باريم اكسيد-منگنز اكسيد به روش رسوبدهي حمام شيميايي و استفاده از آن در ساخت ابرخازن‌هاي نوري

In this study, the fabrication of a photo-supercapacitor based on Barium-Manganese oxides was investigated. The substrate used in this process was WTiO2 which was prepared via an electrochemical anodization technique. Then using the chemical bath deposition, Barium oxide an‎d Manganese oxide particles were synthesized on the surface of the nanotubes. Subsequently, their morphological an‎d photoelectronchemical properties were studied using various techniques. SEM results showed that highly ordered nanotubes, perpendicular to the surface, had grown on the titanium substrates. Furthermore, through the deposition process, a coating of Barium-Manganese nanoparticles had formed on the surface of the nanotubes. Depending on the composition of the deposition bath, some samples exhibited particle aggregation. Photoelectrochemical studies revealed that the samles containing both Manganese an‎d Barium oxides exhibited superior performance. The optimized photoelectrode, compared to other electrodes, exhibited a capacitance of 4/5285 mF/〖Cm〗^2 at a current density of 0.05 mA in the dark. Under illumination, the capacitance increased by a factor of 2/21 reaching 10/022 mF/〖Cm〗^2 . subsequently, in the two electrode test, both symmetric an‎d asymmetric systems based on FTO were fabricated an‎d electrochemical tests were conducted under both light an‎d dark conditions. In the symmetric system, the fabricated supercapacitor exhibited a capacitance of 1 mF/〖Cm〗^2 at a current of 0.05 mA. In the asymmetric configuration, the obtained capacitance at the same current density was 0/75 mF/〖Cm〗^2 in the dark an‎d 1/12 mF/〖Cm〗^2 under illumination, indicating a higher capacitance under light compared to dark conditions.This system exhibited 95% stability after 10000 cycles in the symmetric configuration, while in the asymmetric configuration under dark conditions, it retained 74% of its capacitance after 10000 cycles.

محمدمحسن مومني هامانه

حسين فرخ پور , اسماعيل حيدري