A NOVEL GEL ELECTROLYTE FOR VALVE-REGULATED LEAD ACID BATTERY

• Main Authors: Metin GENÇTEN, Koray Bahadır DÖNMEZ, Yücel ŞAHİN
• Format: Article
• Language: English
• Published: Anadolu University 2017-03-01
• Series: Anadolu University Journal of Science and Technology. A : Applied Sciences and Engineering
• Online Access: http://dergipark.gov.tr/aubtda/issue/28283/300420?publisher=anadolu

A novel gel electrolyte system used in lead-acid batteries was investigated in this work. The gel systems were prepared by addition different amount of Al2O3, TiO2 and B2O3 into the gelled system consisting of 6 wt% fumed silica and 30 wt% sulfuric acid solution. The anodic peak currents and peak redox capacities of the gel electrolytes were characterized by cyclic voltammetric method. They decreased by the time B2O3 and Al2O3 were used as additives in fumed silica based gel electrolyte system. However, these values increased by the adding 3.0 wt% of TiO2. The solution and charge transfer resistances of the gel electrolytes were investigated by electrochemical impedance spectroscopy. While the solution resistances were lower in gel systems having different amount additives than pure fumed silica based gel, the charge transfer resistance was the lowest in gel electrolytes consisting fumed silica and fumed silica-TiO2. The battery performances were studied by obtaining discharge curves of prepared gel electrolytes. The performance of gelled systems were higher than that of non-gelled electrolyte at room temperature. The mixture of fumed silica-TiO2 was suggested an alternative gel formulation for gel VRLA batteries.