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http://dx.doi.org/10.5012/bkcs.2008.29.5.998

The Optimization of Gel Electrolytes on Performance of Valve Regulated Lead Acid Batteries  

An, Sang-Yong (Department of Chemistry, Pusan National University)
Jeong, Euh-Duck (High-Technology Components & Materials Research Center, Basic Science Institute)
Won, Mi-Sook (High-Technology Components & Materials Busan Center, Basic Science Institute)
Shim, Yoon-Bo (Department of Chemistry, Pusan National University)
Publication Information
Bulletin of the Korean Chemical Society / v.29, no.5, 2008 , pp. 998-1002 More about this Journal
Abstract
The gel electrolytes were prepared with sulfuric acid and phosphoric acid, where hydrophilic fumed silica was used as a gelling agent. The influences of gel electrolyte on performance of the valve regulated lead acid (VRLA) batteries were investigated employing capacity tests, electrochemical impedance spectroscopy and scanning electron microscopy. The initial capacities of the sulfuric gel VRLA batteries were higher than that of phosphoric gel VRLA batteries. The sulfuric gel VRLA battery using 1.210 specific gravity of sulfuric acid with hydrophilic fumed silica exhibited the highest capacity of 0.828Ah. In the impedance measurements, the ohmic and charge transfer resistances for the phosphoric gel VRLA batteries were higher thanthat of sulfuric gel batteries. The morphology of electrodes of phosphoric gel VRLA batteries were more deteriorated in the SEM image.
Keywords
Gel electrolytes; Valve regulated lead acid; Impedance spectroscopy
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
Times Cited By Web Of Science : 3  (Related Records In Web of Science)
Times Cited By SCOPUS : 3
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