• Phone46775887, 46775858, 21328043
  • Emailjohh@dtu.dk
  • Website
  • Fysikvej, 310, 320

    2800 Kgs. Lyngby

    Denmark

20072022
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Research Output 2007 2018

Complementary analyses of aging in a commercial LiFePO4/graphite 26650 cell

Scipioni, R., Jørgensen, P. S., Stroe, D. I., Younesi, R., Simonsen, S. B., Norby, P., Hjelm, J. & Jensen, S. H., 10 Sep 2018, In : Electrochimica Acta. 284, p. 454-468

Research output: Contribution to journalJournal articleResearchpeer-review

Electrochemical Characterization of a PEMEC Using Impedance Spectroscopy (vol 164, F1419, 2017)

Elsøe, K., Grahl-Madsen, L., Scherer, G. G., Hjelm, J. & Mogensen, M. B., 2018, In : Journal of the Electrochemical Society. 165, 10, p. X9-X9

Research output: Contribution to journalComment/debateCommunication

Electrochemical impedance of an alkaline organic flow battery

Hoffmeyer, D. & Hjelm, J., 2018, Book of Conference Papers of the International Flow Battery Forum (IFBF 2018). 3 p.

Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearchpeer-review

153 Downloads (Pure)

Noise Phenomena in Electrochemical Impedance Spectroscopy of Polymer Electrolyte Membrane Electrolysis Cells

Elsøe, K., Kraglund, M. R., Grahl-Madsen, L., Scherer, G. G., Hjelm, J., Jensen, S. H., Jacobsen, T. & Mogensen, M. B., 2018, In : Fuel Cells. 18, 5, p. 640-648

Research output: Contribution to journalJournal articleResearchpeer-review

Open Access
File

Reactivating the Ni-YSZ electrode in solid oxide cells and stacks by infiltration

Skafte, T. L., Hjelm, J., Blennow Tullmar, P. & Graves, C. R., 2018, In : Journal of Power Sources. 378, p. 685-690

Research output: Contribution to journalJournal articleResearchpeer-review

Projects 2008 2022

Activities 2017 2017

  • 1 Conference presentations

Regenerating the performance of solid oxide electrolyzers by periodic treatments to extend lifetime

Christopher R. Graves (Speaker), Theis Løye Skafte (Other), Marco Marchese (Other), Anne Hauch (Other), Andrea Lanzini (Other), Karin Vels Hansen (Guest lecturer), Torben Jacobsen (Other), Peter Blennow (Other), Johan Hjelm (Other)
13 Jun 2017

Activity: Talks and presentationsConference presentations