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Research Papers

Effect of Membrane Electrode Assembly Bonding Technique on Fuel Cell Performance and Platinum Crystallite Size

[+] Author and Article Information
Steven Buelte

Research Scientist
Center for Automation Technologies and Systems,
Rensselaer Polytechnic Institute,
110 8th Street,
Troy, NY 12180
e-mail: Steve.buelte@gmail.com

Daniel Walczyk

Professor of Mechanical Engineering
Center for Automation Technologies and Systems,
Rensselaer Polytechnic Institute,
110 8th Street,
Troy, NY 12180
e-mail: walczd@rpi.edu

Ian Sweeney

Center for Automation Technologies and Systems,
Rensselaer Polytechnic Institute,
110 8th Street,
Troy, NY 12180
e-mail: ian.swy@gmail.com

1Corresponding author.

Contributed by the Advanced Energy Systems Division of ASME for publication in the JOURNAL OF FUEL CELL SCIENCE AND TECHNOLOGY. Manuscript received May 8, 2013; final manuscript received August 4, 2013; published online January 2, 2014. Editor: Nigel M. Sammes.

J. Fuel Cell Sci. Technol 11(3), 031002 (Jan 02, 2014) (10 pages) Paper No: FC-13-1046; doi: 10.1115/1.4025525 History: Received May 08, 2013; Revised August 04, 2013

Major efforts are underway to reduce fuel cell manufacturing costs, thereby facilitating widespread adoption of fuel cell technology in emerging applications, such as combined heat and power and transportation. This research investigates new methods for fabricating membrane electrode assemblies (MEAs), which are at the core of fuel cell technology. A key manufacturing step in the production of fuel cell MEAs is bonding two electrodes to an ionically conductive membrane. In particular, new MEA bonding methods are examined for polybenzimidazole-based phosphoric acid (PBI/PA) fuel cells. Two new methods of bonding PBI/PA fuel cell MEAs were studied with the goal of reducing cycle time to reduce manufacturing costs. Specifically, the methods included ultrasonic bonding and thermally bonding with advance process control (APC thermal). The traditional method of thermally bonding PBI MEAs requires 30 seconds, whereas the new bonding methods reduce the cycle time to 2 and 8 seconds, respectively. Ultrasonic bonding was also shown to significantly reduce the energy consumed by the bonding process. Adverse effects of the new bonding methods on cell performance and structure were not observed. Average cell voltages at 0.2 A/cm2 for ultrasonic, APC thermal, and thermally bonded MEAs were 650 mV, 651 mV, and 641 mV, respectively. The platinum crystallite size was found to be the same before and after ultrasonic bonding using XRD. Furthermore, changes in the electrode pore structure were not observed in SEM images taken after ultrasonic bonding. The test results show that it is possible to reduce manufacturing costs by switching to faster methods of bonding PBI phosphoric acid fuel cell MEAs.

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References

ClearEdge Power, 2013, “Energy Solutions: Clean, Critical, Secure,” ClearEdge Power, Sunnyvale, CA, http://www.clearedgepower.com/commercial/clearedge5-hydrogen-fuel-cell
Holladay, J. D., Wainright, J. S., Jones, E. O., and Gano, S. R., 2004, “Power Generation Using a Mesoscale Fuel Cell Integrated With a Microscale Fuel Processor,” J. Power Sources, 130(1–2), pp. 111–118. [CrossRef]
Li, Q., He, R., Jensen, J. O., and Bjerrum, N. J., 2004, “PBI-Based Polymer Membranes for High Temperature Fuel Cells—Preparation, Characterization and Fuel Cell Demonstration,” Fuel Cells, 4(3), pp. 147–159. [CrossRef]
Yang, C., Costamagna, P., Srinivasan, S., Benziger, J., and Bocarsly, A. B., 2001, “Approaches and Technical Challenges to High Temperature Operation of Proton Exchange Membrane Fuel Cells,” J. Power Sources, 103(1), pp. 1–9. [CrossRef]
Xiao, L., Zhang, H., Jana, T., Scanlon, E., Chen, R., Choe, E. W., Ramanathan, L. S., Yu, S., and BenicewiczB. C., 2005, “Synthesis and Characterization of Pyridine-Based Polybenzimidazoles for High Temperature Polymer Electrolyte Membrane Fuel Cell Applications,” Fuel Cells, 5(2), pp. 287–295. [CrossRef]
Korsgaard, A. R., Nielsen, M. P., and Kær, S. K., 2008, “Part One: A Novel Model of HTPEM-Based Micro-Combined Heat and Power Fuel Cell System,” Int. J. Hydrogen Energy, 33(7), pp. 1909–1920. [CrossRef]
B2PCOE, 2012, Manufacturing Fuel Cell Manhattan Project, ACI Technologies, Philadelphia, PA.
Puffer, R., and Rock, S., 2009, “Recent Advances in High Temperature Proton Exchange Membrane Fuel Cell Manufacturing,” ASME J. Fuel Cell Sci. Technol., 6(4), p. 041013. [CrossRef]
Snelson, T., 2011, “Ultrasonic Sealing of PEM Fuel Cell Membrane Electrode Assemblies,” Ph.D. thesis, Rensselaer Polytechnic Institute, Troy, NY.
Grewell, D., Benatar, A., and Park, J., 2003, Plastics and Composites Welding Handbook, Carl Hanser Verlag, Munich, Germany.
Beck, J., Walczyk, D., Hoffman, C., and Buelte, S., 2012, “Ultrasonic Bonding of Membrane Electrode Assemblies for Low Temperature Proton Exchange Membrane Fuel Cells,” ASME J. Fuel Cell Sci. Technol., 9(5), p. 051005. [CrossRef]
Gullotta, J., Krishnan, L., Share, D., Walczyk, D., and Puffer, R. J., 2010, “Adaptive Process Control and In-Situ Diagnostics for High Temperature PEM MEA Manufacturing,” ASME Paper No. FuelCell2010-33231 [CrossRef].
Xiao, L., Zhang, H., Scanlon, E., Ramanathan, L. S., Choe, E.-W., Rogers, D., Apple, T., and Benicewicz, B. C., 2005, “High-Temperature Polybenzimidazole Fuel Cell Membranes Via a Sol-Gel Process,” Chem. Mater., 17(21), pp. 5328–5333. [CrossRef]
Cutlip, M., Yang, S., and Stonehart, P., 1991, “Simulation and Optimization of Porous Electrodes Used in Hydrogen Oxygen Phosphoric Acid Fuel Cells,” Electrochim. Acta, 36(314), pp. 547–553. [CrossRef]
Conway, B. E., and Pell, W. G., 2002, “Power Limitations of Supercapacitor Operation Associated With Resistance and Capacitance Distribution in Porous Electrode Devices,” J. Power Sources, 105, pp. 169–181. [CrossRef]
Christner, L., and George, M., 1981, “Electrode Optimization for Phosphoric Acid Fuel Cells. Final Report,” Energy Research Corp. Report No. DOE/ET/13114-T8.
Yu, S., Zhang, H., Xiao, L., Choe, E.-W., and Benicewicz, B. C., 2009, “Synthesis of Poly (2,2′-(1,4-phenylene) 5,5′-bibenzimidazole) (para-PBI) and Phosphoric Acid Doped Membrane for Fuel Cells,” Fuel Cells, 9(4), pp. 318–324. [CrossRef]
Perry, K. A., Eisman, G. A., and Benicewicz, B. C., 2008, “Electrochemical Hydrogen Pumping Using a High-Temperature Polybenzimidazole (PBI) Membrane,” J. Power Sources, 177(2), pp. 478–484. [CrossRef]
Shi, W., and Little, T., 2000, “Mechanisms of Ultrasonic Joining of Textile Materials,” Int. J. Clothing Sci. Technol., 12(5), pp. 331–350. [CrossRef]
Emerson Industrial Automation, 2013, “Plastics Joining Literature,” White Papers TL-2 and PW-2, http://www.emersonindustrial.com/en-US/branson/Products/plastic-joining/Pages/PlasticJoiningLiterature.aspx
Jalani, N. H., Ramani, M., Ohlsson, K., Buelte, S., Pacifico, G., Pollard, R., Staudt, R., and Datta, R., 2006, “Performance Analysis and Impedance Spectral Signatures of High Temperature PBI-Phosphoric Acid Gel Membrane Fuel Cells,” J. Power Sources, 160(2), pp. 1096–1103. [CrossRef]
Wagner, N., 2002, “Characterization of Membrane Electrode Assemblies in Polymer Electrolyte Fuel Cells Using a.c. Impedance Spectroscopy,” J. Appl. Electrochem., 32(8), pp. 859–863. [CrossRef]
Springer, T. E., Zawodzinski, T. A., Wilson, M. S., and Gottesfeld, S., 1996, “Characterization of Polymer Electrolyte Fuel Cells Using AC Impedance Spectroscopy,” J. Electrochem. Soc., 143(2), pp. 587–599. [CrossRef]
Cullity, B. D., and Stock, S. R., 2001, Elements of X-Ray Diffraction, Prentice-Hall, Englewood Cliffs, NJ.
Aragane, J., Urushibata, H., and Murahashi, T., 1996, “Effect of Operational Potential on Performance Decay Rate in a Phosphoric Acid Fuel Cell,” J. Appl. Electrochem., 26(2), pp. 147–152. [CrossRef]
Qi, Z., and Buelte, S., 2006, “Effect of Open Circuit Voltage on Performance and Degradation of High Temperature PBI-H3PO4 Fuel Cells,” J. Power Sources, 161(2), pp. 1126–1132. [CrossRef]
Landsman, D. A., and Luczak, F. J., 2003, “Catalyst Studies and Coating Technologies,” Handbook of Fuel Cells, W.Vielstich, A.Lamm, H. A.Gasteiger, and H.Yokokawa, eds., Wiley, New York, p. 824.
Stonehart, P., 1992, “Development of Alloy Electrocatalysts for Phosphoric Acid Fuel Cells (PAFC),” J. Appl. Electrochem., 22(11), pp. 995–1001. [CrossRef]
Prasanna, M., Ha, H. Y., Cho, E. A., Hong, S.-A., and Oh, I.-H., 2004, “Investigation of Oxygen Gain in Polymer Electrolyte Membrane Fuel Cells,” J. Power Sources, 137(1), pp. 1–8. [CrossRef]
Buelte, S. J., 2011, “Effects of Phosphoric Acid Concentration on Platinum Catalyst and Phosphoric Acid Hydrogen Pump Performance,” Ph.D. thesis, Rensselaer Polytechnic Institute, Troy, NY.
Jaouen, F., and Lindbergh, G., 2003, “Transient Techniques for Investigating Mass-Transport Limitations in Gas Diffusion Electrodes,” J. Electrochem. Soc., 150(12), p. A1699. [CrossRef]
Maillard, F., Martin, M., Gloaguen, F., and Le, J., 2002, “Oxygen Electroreduction on Carbon-Supported Platinum Catalysts. Particle-Size Effect on the Tolerance to Methanol Competition,” Electrochim. Acta, 47, pp. 3431–3440. [CrossRef]

Figures

Grahic Jump Location
Fig. 1

Conceptual diagram of MEA bonding

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Fig. 2

Fixture and process for aligning MEA subcomponents

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Fig. 3

The thermal bonding process, where MEAs are thermally pressed at 140 °C for 30 seconds to 75% of the combined starting thickness of the subcomponents

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Fig. 4

Ultrasonic bonding system. A pneumatic cylinder drives the anvil up to compress the MEA between the horn and the anvil. The convertor, booster, and horn assembly vibrates vertically at 20 kHz, causing rapid heating of the MEA material interfaces.

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Fig. 8

Electrochemical parameter extraction form Ohmic loss corrected V-log(I) plots for a cell operated on air and oxygen

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Fig. 7

The Ohmic loss is added to the cell voltage at each current density to remove this loss from the V/I curve. The Ohmic loss is calculated by multiplying the impedance measured at 1000 Hz by the corresponding current.

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Fig. 6

Cell hardware and serpentine gas flow fields: two-channel anode flow field (left) and three-channel cathode flow field (right)

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Fig. 5

APC thermal bonding apparatus

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Fig. 9

Effect of incomplete Ohmic loss correction on a V-log(I) plot

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Fig. 10

Effect of electronic shorts (low electronic resistance) on the Tafel slope. The table on the figure shows calculated Tafel slopes based on measured baseline slope of 95 mV/decade and an assumed range of electronic shorting resistances.

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Fig. 11

XRD data acquired before and after ultrasonic and thermal MEA bonding shows no change in crystallite size. The platinum (111) peak is seen between 38° and 44°. The intensity is not normalized on the plot on the left and is normalized by a factor of 1.02, 1.05, and 1.07 for the 2000-J ultrasonic, 5000-J ultrasonic, and thermally bonded electrodes, respectively.

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Fig. 12

SEM images taken before (left) and after (right) ultrasonic bonding

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