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

Kajari Kargupta; Swati Saha; Dipali Banerjee; Mrinal Seal; Saibal Ganguly

Volume 40 Issue 06

Jun. 2012

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Kajari Kargupta, Swati Saha, Dipali Banerjee, Mrinal Seal, Saibal Ganguly. Performance enhancement of phosphoric acid fuel cell using phosphosilicate gel based electrolyte[J]. Journal of Fuel Chemistry and Technology, 2012, 40(06): 707-713.

Citation:

Kajari Kargupta, Swati Saha, Dipali Banerjee, Mrinal Seal, Saibal Ganguly. Performance enhancement of phosphoric acid fuel cell using phosphosilicate gel based electrolyte[J]. Journal of Fuel Chemistry and Technology, 2012, 40(06): 707-713.

Citation:

Kajari Kargupta, Swati Saha, Dipali Banerjee, Mrinal Seal, Saibal Ganguly. Performance enhancement of phosphoric acid fuel cell using phosphosilicate gel based electrolyte[J]. Journal of Fuel Chemistry and Technology, 2012, 40(06): 707-713.

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

1.
Chemical Engineering Department, Jadavpur University, Kolkata 700032, India;
2.
Department of Physics, Bengal Engineering and Science University, Shibpur, WB, India;
3.
Chemical Engineering Department, Universiti Teknologi Petronas, Perak Darul Ridzuan, Tronoh 31750, Malaysia

Received Date: 2011-12-05
Rev Recd Date: 2012-05-14
Publish Date: 2012-06-30

Abstract

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 ℃ 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 ℃, 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.
- phosphosilicate gel paste,
- inorganic-organic composite,
- performance enhancement,
- polyvinyl alcohol,
- PAFC

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References(18)

References

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