Effect of Operating Variables on DMFC Performance for the Synthesized Si-PWA/PVA Nanocomposite Membrane
DOI:
https://doi.org/10.6000/1929-6037.2015.04.04.3Keywords:
Nanocomposite membrane, Membrane electrode assembly, proton conductivity, methanol crossover, over-potentialAbstract
Electrochemical Performance of DMFC was studied under the effect of various operating parameters like temperature, methanol concentration and relative humidity (RH) for the synthesized silica immobilized phosphotungstic acid-poly(vinyl alcohol) (Si-PWA/PVA) nanocomposite membrane (thickness 80-100 µm). The optimized 1.5 Si-PWA/PVA membrane showed good electrochemical properties (transport number: 0.92 and IEC: 0.90 meq/g) with excellent mechanical strength, thermal and chemical stability. Open circuit voltage (OCV) decay was significantly lower in comparison to Nafion-117. Maximum power density (45.7 mWcm-2) was obtained at 60oC cell temperature. DMFC performance exhibited better performance even at higher methanol concentration (2 M) demonstrating lower concentration over potential. The appreciable rise in the peak power density observed at higher relative humidity (90%) showed good water stability of the membrane. Performance of the DMFC with the synthesized composite membrane was comparable to the state of the art Nafion-117.
References
Kamarudin SK, Achmad F, Daud WRW. Overview on the application of direct methanol fuel cell (DMFC) for portable electronic devices. Int J Hydrogen Energy 2009; 34: 6902-16. http://dx.doi.org/10.1016/j.ijhydene.2009.06.013
Arico AS, Srinivasan S, Antonucci V. DMFCs: from fundamental aspects to technology development. Fuel Cells 2001; 1: 133-61. http://dx.doi.org/10.1002/1615-6854(200107)1:2<133::AID-FUCE133>3.0.CO;2-5
Smitha B, Sridhar S, Khan AA. Solid polymer electrolyte membranes for fuel cell applications-a review. J Membr Sci 2005; 259: 10-26. http://dx.doi.org/10.1016/j.memsci.2005.01.035
Wasmus S, Kuver A. Methanol oxidation and direct methanol fuel cells: a selective review. J Electroanal Chem 999; 461: 14-31. http://dx.doi.org/10.1016/s0022-0728(98)00197-1
Mohan S, Shrestha SOB. Experimental investigation of a passive direct methanol fuel cell. Open Fuel Energy Sci J 2009; 2: 124-28. http://dx.doi.org/10.2174/1876973X01002010124
Chen S, Ye F, Lin W. Effect of operating conditions on the performance of a direct methanol fuel cell with PtRuMo/CNTs as anode catalyst. Int J Hydrogen Energy 2010; 35: 8225-33. http://dx.doi.org/10.1016/j.ijhydene.2009.12.085
Surampudi S, Narayanan SR, Vamos E, Frank H, Halpert G, LaConti A. Advances in direct oxidation methanol fuel cells. J Power Sources 1994; 47: 377-85. http://dx.doi.org/10.1016/0378-7753(94)87016-0
Yu B, Yang Q, Kianimanesh A, Freiheit T, Park SS, Zhao H, Xue D. A CFD model with semi-empirical electrochemical relationships to study the influence of geometric and operating parameters on DMFC performance. Int J Hydrogen Energy 2013; 38: 9873-85. http://dx.doi.org/10.1016/j.ijhydene.2013.05.118
Oliveira VB, Rangel CM, Pinto AMFR. Performance of a direct methanol fuel cell operating close to room temperature. J Fuel Cell Sci Tech 2011; 8: 1-8. http://dx.doi.org/10.1115/1.4002311
Pandey J, Mir FQ, Shukla A. Synthesis of silica immobilized phosphotungstic acid (Si-PWA)-poly(vinyl alcohol) (PVA) composite ion-exchange membrane for direct methanol fuel cell. Int J Hydrogen Energy 2014; 39: 9473-81. http://dx.doi.org/10.1016/j.ijhydene.2014.03.237
Lu J, Tang H, Lu S, Wu H, Jiang SP. A novel inorganic proton exchange membrane based on self-assembled HPW-meso-silica for direct methanol fuel cells. J Mater Chem 2011; 21: 6668-76. http://dx.doi.org/10.1039/c0jm03695a
Pandey J, Mir FQ, Shukla A. Performance of PVDF supported silica immobilized phosphotungstic acid membrane (Si-PWA/PVDF) in direct methanol fuel cell. Int J Hydrogen Energy 2014; 39: 17306-13. http://dx.doi.org/10.1016/j.ijhydene.2014.08.046
Deluca NW, Elabd YA. Direct methanol fuel cell performance of Nafion®/poly(vinyl alcohol) blend membranes. J Power Sources 2006; 163: 386-91. http://dx.doi.org/10.1016/j.jpowsour.2006.09.009
Scott K, Taama WM, Argyropoulos P, Sundmacher K. The impact of mass transport and methanol crossover on the direct methanol fuel cell. J Power Source 1999; 83: 204-16. http://dx.doi.org/10.1016/S0378-7753(99)00303-1
Zawodzinski TA, Springer TE, Uribe F, Gottesfeld S. Characterization of polymer electrolytes for fuel cell applications. Solid State Ionics 1993; 60: 199-211. http://dx.doi.org/10.1016/0167-2738(93)90295-E
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