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Greg Coffey

Greg Coffey

Pacific Northwest National Laboratory
PO Box 999
Richland, WA 99352
(509) 375-6602


Greg Coffey is a scientist in the Electrochemical Materials & Systems group. He received a BA, and MS in Materials Science and Engineering from Washington State University.

Research Interests

  • High temperature electrochemistry (600-1000C)
  • SOFC fuel cell, NOX, / O2 automotive exhaust sensors, environmental degradation
  • High pressure phase equilibria (+50KSI)
  • Diesel fuel, and synthetic analog wax/crystallite formation
  • Corrosion at elevated temperatures/pressures (300C,2000PSI)
  • Mechanistic studies of Zircalloy corrosion
  • Ionic conduction
  • H+, O-2 conduction in dense oxide electrolytes
  • Energy storage
  • Lithium, Nickle, Sodium, Lead acid

Education and Credentials

  • B.A. Materials Science and Engineering
  • M.S. Materials Science and Engineering

PNNL Patents

PNNL Publications


  • Overman NR, X Jiang, RK Kukkadapu, T Clark, TJ Roosendaal, GW Coffey, JE Shield, and S Mathaudhu. 2018. "Physical and electrical properties of melt-spun Fe-Si (3-8 wt%) soft magnetic ribbons." Materials Characterization 136:212-220.  doi:10.1016/j.matchar.2017.12.019



  • Viswanathan VV, AJ Crawford, DE Stephenson, S Kim, W Wang, B Li, GW Coffey, EC Thomsen, GL Graff, PJ Balducci, MCW Kintner-Meyer, and VL Sprenkle. 2014. "Cost and Performance Model for Redox Flow Batteries." Journal of Power Sources 247:1040-1051.  doi:10.1016/j.jpowsour.2012.12.023


  • Reed DM, GW Coffey, ES Mast, NL Canfield, J Mansurov, X Lu, and VL Sprenkle. 2013. "Wetting of Sodium on ß?-Al2O3/YSZ Composites for Low Temperature Planar Sodium-Metal Halide Batteries ." Journal of Power Sources 227:94-100.  doi:10.1016/j.jpowsour.2012.11.034
  • Kim S, EC Thomsen, G Xia, Z Nie, J Bao, KP Recknagle, W Wang, VV Vishwanathan, Q Luo, X Wei, AJ Crawford, GW Coffey, GD Maupin, and VL Sprenkle. 2013. "1 kW / 1kWh Advanced Vanadium Redox Flow Battery Utilizing Mixed Acid Electrolytes." Journal of Power Sources 237:300-309.  doi:10.1016/j.jpowsour.2013.02.045
  • Vilayur Ganapathy S, MI Nandasiri, AG Joly, PZ El-Khoury, T Varga, GW Coffey, B Schwenzer, A Pandey, AN Kayani, WP Hess, and S Thevuthasan. 2013. "Silver nanorod arrays for photocathode applications." Applied Physics Letters 103(16):Article No. 161112.  doi:10.1063/1.4825262


  • Marina OA, CA Coyle, EC Thomsen, DJ Edwards, GW Coffey, and LR Pederson. 2010. "Degradation Mechanisms of SOFC Anodes in Coal Gas Containing Phosphorus." Solid State Ionics 181(8-10):430-440. 
  • Yoon KJ, CN Cramer, EC Thomsen, CA Coyle, GW Coffey, and OA Marina. 2010. "Calcium- and Cobalt-doped Yttrium Chromites as an Interconnect Material for Solid Oxide Fuel Cells." Journal of the Electrochemical Society 157(6):B856-B861. 
  • Lu X, GW Coffey, KD Meinhardt, VL Sprenkle, Z Yang, and JP Lemmon. 2010. "High Power Planar Sodium-Nickel Chloride Battery." ECS Transactions 28(22):7-13.  doi:10.1149/1.3492326


  • Marina OA, LR Pederson, CA Coyle, EC Thomsen, and GW Coffey. 2009. "Ni/YSZ Anode Interactions with Impurities in Coal Gas ." ECS Transactions 25(2):2125-2130.  doi:10.1149/1.3205760
  • Coyle CA, OA Marina, EC Thomsen, DJ Edwards, CN Cramer, GW Coffey, and LR Pederson. 2009. "Interactions of nickel/zirconia solid oxide fuel cell anodes with coal gas containing arsenic." Journal of Power Sources 193(2):730-738.  doi:10.1016/j.jpowsour.2009.04.042
  • Thomsen EC, GW Coffey, LR Pederson, and OA Marina. 2009. "Performance of Lanthanum Strontium Manganite Electrodes at High Pressure." Journal of Power Sources 191(2):217-224. 


  • Marina OA, GW Coffey, CA Coyle, CD Nguyen, EC Thomsen, and LR Pederson. 2008. Anode Interactions with Coal Gas ContaminantsPNNL-17745, Pacific Northwest National Laboratory, Richland, WA. 
  • Zhou XD, LR Pederson, EC Thomsen, Z Nie, and GW Coffey. 2008. "Nonstoichiometry and Transport Properties of Ca3Co4±xO9+d (x = 0 - 0.4)." Electrochemical and Solid-State Letters 12(2):F1-F3.  doi:10.1149/1.3039948


  • Marina OA, LR Pederson, MC Williams, GW Coffey, KD Meinhardt, CD Nguyen, and EC Thomsen. 2007. "Electrode Performance in Reversible Solid Oxide Fuel Cells." Journal of the Electrochemical Society 154(5):B452-B459. 
  • McCarthy B, LR Pederson, HU Anderson, XD Zhou, P Singh, GW Coffey, and EC Thomsen. 2007. "Enhanced Shrinkage of Lanthanum Strontium Manganite (La0.90Sr0.10MnO3+d) Resulting from Thermal and Oxygen Partial Pressure Cycling." Journal of the American Ceramic Society 90(10):3255-3262.  doi:10.1111/j.1551-2916.2007.01890.x
  • Coffey GW, LR Pederson, DM Ponds, PC Rieke, and EC Thomsen. 2007. "Fabrication and Characterization of a Novel Luggin Capillary Reference Electrode for use in Solid State Electrolytes." Solid State Ionics 178(11-12):827-832. 


  • Zhou XD, J Yang, EC Thomsen, Q Cai, BJ Scarfino, Z Nie, GW Coffey, WJ James, WB Yelon, HU Anderson, and LR Pederson. 2006. "Electrical, Thermoelectric, and Structural Properties of La(MxFe1-x)O3 (M=Mn, Ni, Cu)." Journal of the Electrochemical Society 153(12):J133-J138 . 
  • Yang ZG, GW Coffey, JP Rice, P Singh, JW Stevenson, and G Xia. 2006. "High Temperature Corrosion Behavior of Oxidation Resistant Alloys under SOFC Interconnect Dual Exposures ." Chapter 21 in Advances in Solid Oxide Fuel Cells II: Ceramic Engineering and Science Proceedings, vol. 27, no. 4, ed. NP Bansal, A Wereszczak and E Lara-Curzio, pp. 211-221.  American Ceramic Society, Westerville, OH.  doi:10.1002/9780470291337.ch21


  • Coffey GW, JS Hardy, OA Marina, LR Pederson, PC Rieke, and EC Thomsen. 2005. "Copper Doped Lanthanum Strontium Ferrite for Reduced Temperature Solid Oxide Fuel Cells." In Fourteenth International Conference on Solid State Ionics, Jun 22-27 2003, Monterey, CA., USA. Published in Solid State Ionics, vol. 175, no. 1-4, pp. 73-78.  Elsevier, Amsterdam, Netherlands. 


  • Marina OA, GW Coffey, LR Pederson, PC Rieke, EC Thomsen, and MC Williams. 2004. "ELECTRODE DEVELOPMENT FOR REVERSIBLE SOLID OXIDE FUEL CELLS ." In 2004 Joint International Meeting, Fifth International Symposium on Ionic and Mixed Conducting Ceramics, p. 1725.  Electrochemical Society, Pennington, NJ. 
  • Coffey GW, JS Hardy, OA Marina, LR Pederson, PC Rieke, and EC Thomsen. 2004. "Copper Doped Lanthanum Strontium Ferrite for Reduced Temperature Solid Oxide Fuel Cells." Solid State Ionics 175(1-4):73-78.  doi:10.1016/j.ssi.2004.09.015


  • Coffey GW, JS Hardy, LR Pederson, PC Rieke, and EC Thomsen. 2003. "Oxygen Reduction Activity of Lanthanum Strontium Nickel Ferrite." Electrochemical and Solid-State Letters 6(6):A121-A124. 
  • Coffey GW, JS Hardy, LR Pederson, PC Rieke, EC Thomsen, and MB Walpole. 2003. "Electrochemical Properties of Lanthanum Strontium Aluminum Ferrites for the Oxygen Reduction Reaction." Solid State Ionics 158(1-2):1-9. 
  • Coffey GW, LR Pederson, and PC Rieke. 2003. "Competition Between Bulk and Surface Pathways in Mixed Ionic Electronic Conducting Oxygen Electrodes." Journal of the Electrochemical Society 150(8):A1139-A1151. 


  • Coffey GW, JS Hardy, KD Meinhardt, OA Marina, and SP Simner. 2002. "All-Ceramic SOFC Tolerant to Oxygen, Carbon and Sulfur." In 2002 Fuel Cell Seminar: Fuel Cells - Reliable, Clean Energy for the World, November 19-21, 2002, Palm Springs, California. , pp. 295-298.  Fuel Cell Seminar, Washington, DC. 

Energy and Environment

Core Research Areas