Performance enhancement of phosphoric acid fuel cell using phosphosilicate gel based electrolyte

Kargupta, K. and Saha, S. and Banerjee, D. and Seal, M. and Ganguly, S. (2012) Performance enhancement of phosphoric acid fuel cell using phosphosilicate gel based electrolyte. Ranliao Huaxue Xuebao/Journal of Fuel Chemistry and Technology, 40 (6). pp. 707-713. ISSN 2097213X

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Abstract

Replacement of phosphoric acid electrolyte by phosphosilicate gel based electrolytes is proposed for performance enhancement of phosphoric acid fuel cell (PAFC). Phosphosilicate gel in paste form and in powder form is synthesized from tetraethoxysilane and orthophosphoric acid using sol-gel method for two different P/Si ratio of 5 and 1.5 respectively. Replacement of phosphoric acid electrolyte by phosphosilicate gel paste enhances the peak power generation of the fuel cell by 133 at 120°C cell temperature; increases the voltage generation in the ohmic regime and extends the maximum possible load current. Polyinyl alcohol (PVA) is used to bind the phosphosilicate gel powder and to form the hybrid crosslinked gel polymer electrolyte membrane. Soaking the membrane with phosphoric acid solution, instead of that with water improves the proton conductivity of the membrane, enhances the voltage and power generation by the fuel cell and extends the maximum possible operating temperature. At lower operating temperature of 70°C, peak power produced by phosphosilicate gel polymer electrolyte membrane fuel cell (PGMFC) is increased by 40 compared to that generated by phosphoric acid fuel cell (PAFC). However, the performance of composite membrane diminishes as the cell temperature increases. Thus phosphosilicate gel in paste form is found to be a good alternative of phosphoric acid electrolyte at medium operating temperature range while phosphosilicate gel-PVA composite offers performance enhancement at low operating temperatures.

Item Type: Article
Additional Information: cited By 10
Uncontrolled Keywords: Composite membranes; Phosphoric acid fuel cells (PAFC); Polyelectrolytes; Polyvinyl alcohols; Proton exchange membrane fuel cells (PEMFC); Sol-gel process; Sol-gels; Solid electrolytes; Temperature, Acid electrolytes; Cell's temperatures; Gel-based; Inorganic/organic composites; Peak power; Performance enhancements; Phosphoric acid fuel cell; Phosphosilicate gel; Phosphosilicate gel pastes; Power- generations, Phosphoric acid
Depositing User: Mr Ahmad Suhairi UTP
Date Deposited: 09 Nov 2023 15:51
Last Modified: 09 Nov 2023 15:51
URI: https://khub.utp.edu.my/scholars/id/eprint/3168

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