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Energy Materials Group

Ed Thomsen

Ed Thomsen

Pacific Northwest National Laboratory
PO Box 999
Richland, WA 99352


Ed Thomsen has over 10 years of experience in solid state ion conductor research. He has been involved in many programs researching fuel cells, batteries, automotive sensors, and basic materials properties. He has designed and built instruments to measure electrical, ionic and mechanical properties of solid state ion conducting materials. He has coauthored more than 50 publications including journal articles, conference proceedings, formal reports and book chapters.

Research Interests

  • Fuel Cells
  • Batteries
  • Solid state electrochemistry
  • Experimental automation using Labview

Education and Credentials

  • B.S. Mechanical Engineering, Washington State University

PNNL Publications


  • Teyber RP, KD Meinhardt, EC Thomsen, E Polikarpov, J Cui, A Rowe, JD Holladay, and JA Barclay. 2018. "Passive Force Balancing of an Active Magnetic Regenerative Liquefier." Journal of Magnetism and Magnetic Materials 451:79-86.  doi:10.1016/j.jmmm.2017.11.002


  • Reed DM, EC Thomsen, B Li, W Wang, Z Nie, BJ Koeppel, and VL Sprenkle. 2016. "Performance of a Low Cost Interdigitated Flow Design on a 1 kW Class All Vanadium Mixed Acid Redox Flow Battery." Journal of Power Sources 306:24-31.  doi:10.1016/j.jpowsour.2015.11.089
  • Reed DM, EC Thomsen, B Li, W Wang, Z Nie, BJ Koeppel, JP Kizewski, and VL Sprenkle. 2016. "Stack Developments in a kW class all vanadium mixed acid redox flow battery at the Pacific Northwest National Laboratory." Journal of the Electrochemical Society 163(1):A5211-A5219.  doi:10.1149/2.0281601jes
  • Crawford AJ, EC Thomsen, DM Reed, DE Stephenson, VL Sprenkle, J Liu, and VV Viswanathan. 2016. "Development and Validation of Chemistry Agnostic Flow Battery Cost Performance Model and Application to Non-Aqueous Electrolyte Systems." International Journal of Energy Research doi:10.1002/er.3526
  • Estevez L, DM Reed, Z Nie, AM Schwarz, MI Nandasiri, JP Kizewski, W Wang, EC Thomsen, J Liu, J Zhang, VL Sprenkle, and B Li. 2016. " Tunable oxygen functional groups as electro-catalysts on graphite felt surfaces for all vanadium flow batteries." ChemSusChem 9(12):1455-1461.  doi:10.1002/cssc.201600198


  • Reed DM, EC Thomsen, W Wang, Z Nie, B Li, X Wei, BJ Koeppel, and VL Sprenkle. 2015. "Performance of Nafion® N115, Nafion® NR-212, and Nafion® NR-211 in a 1 kW Class All Vanadium Mixed Acid Redox Flow Battery." Journal of Power Sources 285:425-430.  doi:10.1016/j.jpowsour.2015.03.099
  • Wei X, G Xia, BW Kirby, EC Thomsen, B Li, Z Nie, GL Graff, J Liu, VL Sprenkle, and W Wang. 2015. "An Aqueous Redox Flow Battery Based on Neutral Alkali Metal Ferri/ferrocyanide and Polysulfide Electrolytes." Journal of the Electrochemical Society 163(1):A5150-A5153.  doi:10.1149/2.0221601jes
  • Crawford AJ, VV Viswanathan, DE Stephenson, W Wang, EC Thomsen, DM Reed, B Li, PJ Balducci, MCW Kintner-Meyer, and VL Sprenkle. 2015. "Comparative analysis for various redox flow batteries chemistries using a cost performance model." Journal of Power Sources 293:388-399.  doi:10.1016/j.jpowsour.2015.05.066


  • Li B, Q Luo, X Wei, Z Nie, EC Thomsen, B Chen, VL Sprenkle, and W Wang. 2014. "Capacity Decay Mechanism of Microporous Separator-Based All-Vanadium Redox Flow Batteries and its Recovery." ChemSusChem 7(2):577-584.  doi:10.1002/cssc.201300706
  • Nasybulin EN, W Xu, BL Mehdi, EC Thomsen, MH Engelhard, RC Masse, P Bhattacharya, M Gu, WD Bennett, Z Nie, CM Wang, ND Browning, and J Zhang. 2014. "Formation of Interfacial Layer and Long-Term Cylability of Li-O-2 Batteries." ACS Applied Materials & Interfaces 6(16):14141-14151.  doi:10.1021/am503390q
  • 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


  • Youngblood GE, EC Thomsen, and CH Henager, Jr. 2013. "Effects of contact resistance on electrical conductivity measurements of SiC-based materials." Journal of Nuclear Materials 442(1-3):S410-S413.  doi:10.1016/j.jnucmat.2013.04.096
  • Chick LA, OA Marina, CA Coyle, and EC Thomsen. 2013. "Effects of temperature and pressure on the performance of a solid oxide fuel cell running on steam reformate of kerosene." Journal of Power Sources 236:341-349.  doi:10.1016/j.jpowsour.2012.11.136


  • Youngblood GE, EC Thomsen, and CH Henager, Jr. 2012. "Effects of Contact Resistance on Electrical Conductivity Measurements of SiC-Based Materials." Chapter 3 in Fusion Materials Semiannual Progress Report for the Period Ending December 31, 2011, vol. 51, ed. FW Wiffen and B Waddell, pp. 39-40.  Oak Ridge National Laboratory, Oak Ridge, TN. 
  • Chou YS, EC Thomsen, JP Choi, and JW Stevenson. 2012. "Compliant alkali silicate sealing glass for solid oxide fuel cell applications: Combined stability in isothermal ageing and thermal cycling with YSZ coated ferritic stainless steels." Journal of Power Sources 197(1):154-160.  doi:10.1016/j.jpowsour.2011.09.027
  • Chou YS, EC Thomsen, JP Choi, and JW Stevenson. 2012. "Compliant alkali silicate sealing glass for solid oxide fuel cell applications: the effect of protective YSZ coating on electrical stability in dual environment ." Journal of Power Sources 202:149-156.  doi:10.1016/j.jpowsour.2011.11.017
  • Stephenson DE, S Kim, F Chen, EC Thomsen, VV Viswanathan, W Wang, and VL Sprenkle. 2012. "Electrochemical Model of the Fe/V Redox Flow Battery." Journal of the Electrochemical Society 159(12):A1993-A2000.  doi:10.1149/2.052212jes


  • Marina OA, LR Pederson, CA Coyle, EC Thomsen, and DJ Edwards. 2011. "Polarization-Induced Interfacial Reactions between Nickel and Selenium in Ni/Zirconia SOFC Anodes and Comparison with Sulfur Poisoning." Journal of the Electrochemical Society 158(1):b36-b43. 
  • Marina OA, LR Pederson, CA Coyle, EC Thomsen, P Nachimuthu, and DJ Edwards. 2011. "Electrochemical, Structural and Surface Characterization of Nickel/Zirconia Solid Oxide Fuel Cell Anodes in Coal Gas Containing Antimony." Journal of Power Sources 196(11):4911-4922.  doi:10.1016/j.jpowsour.2011.02.027
  • Youngblood GE, and EC Thomsen. 2011. "CONTACT RESISTANCE AT A CVD-SIC/NI INTERFACE." In Fusion Materials Semiannual Progress Report for the Period Ending Decemeber 31, 2011, vol. 51; DOE/ER-0313/51, pp. 41-50.  Department of Energy, Oak Ridge, TN. 
  • Youngblood GE, EC Thomsen, and RJ Shinavski. 2011. "Electrical Conductivity of 2D-SiCf/CVI-SiC ." Fusion Science and Technology 60(1):364-368. 
  • Chou YS, EC Thomsen, RT Williams, JP Choi, NL Canfield, JF Bonnett, JW Stevenson, A Shyam, and E Lara-Curzio. 2011. "Compliant alkali silicate sealing glass for solid oxide fuel cell applications: thermal cycle stability and chemical compatibility." Journal of Power Sources 196(5):2709-2716.  doi:10.1016/j.jpowsour.2010.11.020
  • Chou YS, EC Thomsen, JP Choi, WE Voldrich, JW Templeton, and JW Stevenson. 2011. "Development and Implementation of Stack Fixture Tests." Chapter III.E.5 in 2011 Office of Fossil Energy Fuel Cell Program Annual Report, vol. DOE/NETL-2012-1525, pp. 163-167.  Department of Energy, Washington, DC. 


  • 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. 
  • Marina OA, LR Pederson, EC Thomsen, DJ Edwards, CA Coyle, and CN Cramer. 2010. "SOFC Ohmic Resistance Reduction by HCl-Induced Removal of Manganese at the Anode/Electrolyte Interface." Electrochemical and Solid-State Letters 13(6):B63-B67.  doi:10.1149/1.3380668
  • 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. 
  • Marina OA, LR Pederson, EC Thomsen, CA Coyle, and KJ Yoon. 2010. "Reversible Poisoning of the Nickel/Zirconia Solid Oxide Fuel Cell Anodes by Hydrogen Chloride in Coal Gas." Journal of Power Sources 195(20 SP ISS):7033-7037. 


  • 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. 
  • Hardy JS, JYY Kim, EC Thomsen, and KS Weil. 2007. "Improved Wetting of Mixed Ionic/Electronic Conductors Used in Electrochemical Devices with Ternary Reactive Air Braze Filler Metals." Journal of the Electrochemical Society 154(3):P32-P39.  doi:10.1149/1.2430691
  • Hardy JS, EC Thomsen, NL Canfield, JV Crum, KS Weil, and LR Pederson. 2007. "Development of Passive Hydrogen Separation Membranes made from Co-Synthesized Nanoscale Cermet Powders ." International Journal of Hydrogen Energy 32:3631 - 3639.  doi:10.1016/j.ijhydene.2006.08.016


  • 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 . 


  • 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. 
  • Hardy JS, KS Weil, JYY Kim, EC Thomsen, and JT Darsell. 2005. "TiO2-modified Ag-CuO Reactive Air Brazes for Improved Wettability on Mixed Ionic/Electronic Conductors ." In Surfaces, Interfaces, and the Science of Ceramic Joining Published in CERAMIC TRANSACTIONS, vol. 158, pp. 165-171.  American Ceramic Society, Westerville. 


  • 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. 

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