Johan Hjelm

Johan Hjelm

Lektor

DTU ENERGI
Institut for Energikonvertering og -lagring

Danmarks Tekniske Universitet

Frederiksborgvej 399

Bygning 780, rum S03

4000 Roskilde

Tlf.
Tlf.
Mobil
Fax 46 77 58 58
E-mail johh@dtu.dk
ORCID 0000-0003-0072-5784
Hjemmeside

Få tilsendt vCard på e-mail.

Publikationer
Projekter
Kurser
DTU nyheder
Loading

Publikationer rss feed

2018
 

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

Scipioni, Roberto ; Jørgensen, Peter S. ; Stroe, Daniel I. ; Younesi, Reza ; Simonsen, Søren B. ; Norby, Poul ; Hjelm, Johan ; Jensen, Søren H.
in: Electrochimica Acta, vol: 284, pages: 454-468

Type: Journal article (Peer reviewed)

Status: Published     |    År: 2018     |    DOI: https://doi.org/10.1016/j.electacta.2018.07.124

 

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

Elsøe, Katrine ; Grahl-Madsen, L. ; Scherer, G. G. ; Hjelm, Johan ; Mogensen, Mogens Bjerg
in: Journal of the Electrochemical Society, vol: 165, issue: 10, pages: X9-X9

Type: Comment/debate

Status: Published     |    År: 2018     |    DOI: https://doi.org/10.1149/2.0501810jes

 

Electrochemical impedance of an alkaline organic flow battery

Hoffmeyer, Doris ; Hjelm, Johan
part of: Book of Conference Papers of the International Flow Battery Forum (IFBF 2018), 2018
Presented at:
International Flow Battery Forum (IFBF 2018)

Type: Article in proceedings (Peer reviewed)

Status: Published     |    År: 2018

  PDF

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.
in: Fuel Cells, vol: 18, issue: 5, pages: 640-648
Presented at:
6th European PEFC and Electrolyzer Forum

Type: Journal article (Peer reviewed)

Status: Published     |    År: 2018     |    DOI: https://doi.org/10.1002/fuce.201800005

 

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

Skafte, Theis Løye ; Hjelm, Johan ; Blennow Tullmar, Peter ; Graves, Christopher R.
in: Journal of Power Sources, vol: 378, pages: 685-690

Type: Journal article (Peer reviewed)

Status: Published     |    År: 2018     |    DOI: https://doi.org/10.1016/j.jpowsour.2018.01.021

2017
  PDF

Durable fuel electrode

Brodersen, Karen ; Hauch, Anne ; Chen, Ming ; Hjelm, Johan
Patent no.: WO2017029350, Date: 2017-02-23

Type: Patent

Status: Published     |    År: 2017

  PDF

A Physically-Based Equivalent Circuit Model for the Impedance of a LiFePO4/Graphite 26650 Cylindrical Cell

Scipioni, Roberto ; Jørgensen, Peter Stanley ; Graves, Christopher R. ; Hjelm, Johan ; Jensen, Søren Højgaard
in: Journal of The Electrochemical Society, vol: 164, issue: 9, pages: A2017-A2030

Type: Journal article (Peer reviewed)

Status: Published     |    År: 2017     |    DOI: https://doi.org/10.1149/2.1071709jes

 

Carbon deposition and sulfur poisoning during CO2 electrolysis in nickel-based solid oxide cell electrodes

Skafte, Theis Løye ; Blennow, Peter ; Hjelm, Johan ; Graves, Christopher R.
in: Journal of Power Sources, vol: 373, pages: 54-60

Type: Journal article (Peer reviewed)

Status: Published     |    År: 2017     |    DOI: https://doi.org/10.1016/j.jpowsour.2017.10.097

  PDF

Challenges and Possibilities of EIS on PEMEC

Elsøe, Katrine ; Kraglund, Mikkel Rykær ; Hjelm, Johan ; Jacobsen, Torben ; Grahl-Madsen, Laila ; Mogensen, Mogens Bjerg
part of: Procedings of the 6th European PEFC and Electrolyser Forum 2017, 2017, European Fuel Cell Forum
Presented at:
6th European PEFC and Electrolyser Forum 2017

Type: Article in proceedings (Peer reviewed)

Status: Published     |    År: 2017

  PDF

Chemical and Electrochemical Properties of La0.58Sr0.4Fe0.8Co0.2O3-δ (LSCF) Thin Films upon Oxygen Reduction and Evolution Reactions

Pitscheider, Simon ; Machala, Michael ; Guan, Zixuan ; Chen, Di ; Hjelm, Johan ; Jacobsen, Torben ; Chueh, William C. ; Mogensen, Mogens Bjerg ; Chatzichristodoulou, Christodoulos
Presented at:
232nd ECS meeting

Type: Conference abstract for conference (Peer reviewed)

Status: Published     |    År: 2017