Adjunct Professor
Research interests + projects
Fuel cell performance characterization through the breakdown of voltage loss in to kinetic, ohmic and mass transport components (VLB)
Electrochemical Impedance Spectroscopy (EIS), Current Interrupt
Minimally invasive current mapping on PEM fuel cells and fuel cell stacks
Degradation mechanisms for catalyst and membrane limiting fuel cell durability
Structure –performance relationships for PEM fuel cell components
First principles modeling to predict degradation fingerprints
In-situ characterization of cathode catalysts
Water crossover in PEM fuel cells
Gas-liquid two-phase flow in PEM fuel cells
Scholarly and professional activities + affiliations
The Electrochemical Society
The Materials Research Society
Deutsche Physikalische Gesellschaft
Selected publications + presentations
M. Cimenti, M. Tam, J. Stumper, “Artifacts in AC-impedance spectra on PEM fuel cells”, Electrochem. Solid State Lett. 12 B131-B134 (2009)
J. Stumper, R. Rahmani, F. Fuss, “ Diagnostic Tools for PEM performance and degradation”, ECS Transactions, xxx (2009), in press
P. Young, J. Stumper, E. Gyenge, “ Characterizing the structural degradation in a PEMFC cathode catalyst layer: Carbon Corrosion”, J. Electrochem. Soc. 156(8) B913 (2009)
L. Zhang, W. Du, X. Bi, D. Wilkinson, J. Stumper, H. Wang: “Gas-liquid two-phase flow patterns in parallel channels for Fuel Cells”, J. Power Sources 189 1023 (2009)
L. Zhang, X. Bi, D. Wilkinson, J. Stumper, H. Wang: “Gas-liquid two-phase flow patterns in parallel channels for Fuel Cells”, J. Power Sources 183(2) 643 (2008)
P. Sauriol, D. S. Nobes, X. Bi, J. Stumper, D. Jones and D. Kiel: “Design and Validation of a Water Transfer Factor Measurement Apparatus for PEMFC’s”, J. of Fuel Cell Science & Technology, in press
J. Stumper , C. Stone “Recent Advances in Fuel Cell Technology at Ballard” J. Power Sources 176(2) 468 (2008)
P.A.C. Chang, Jean St-Pierre, J. Stumper and B. Wetton: “Flow distribution in PEM fuel cell stacks” J. Power Sources 162 340 (2006)
J. Stumper, M. Loehr, S. Hamada “Diagnostic tools for liquid water in PEM fuel cells“, J Power Sources 143 150 (2005)
J. Stumper, H. Haas and A. Granados “In-situ determination of MEA resistance and electrode diffusivity of a fuel cell”, J. Electrochem. Soc. 152 A837 (2005)
P. Berg, K. Promislow, J. St-Pierre, J. Stumper, B. Wetton : “Water management in PEM fuel cells”, J. Electrochem. Soc. 151 (3) A341 (2004)