Jonathan Højberg

Research engineer

Email: jhoj@topsoe.dk
Phone: +45 22754487
URL: http://www.linkedin.com/pub/jonathan-højberg/20/339/47a

Publications

An Electrochemical Impedance Spectroscopy Investigation of the Overpotentials in Li-O2 Batteries
The influence of CO2 poisoning on overvoltages and discharge capacity in non-aqueous Li-Air batteries
Impregnation of LSM Based Cathodes for Solid Oxide Fuel Cells

PhD information

Project Title: Development of novel electrode-catalyst materials for Li-air battery cathodes
Advisor(s): Tejs Vegge, Poul Norby and Keld Johansen
University: Technical University of Denmark, DTU
Department: DTU Energy Conversion
Company: Haldor Topsøe A/S
Commencement: January 2012

Technical Information

Synthesis techniques: None
Analytical techniques: Mass Spectroscopy (MS), Differential electrochemical mass spectrometry (DEMS), X-ray Diffraction (XRD), Scanning Electron Microscopy (SEM), Transmission Electron Microscopy (TEM)
Electrochemical techniques: Cyclic voltammetry (CV), Electrochemical impedance spectroscopy (EIS),Chronoamperometry, Chronopotentiometry

Description of PhD project

The project is concentrated on characterization and testing novel materials to be used as cathode in Lithium-air batteries. The choice of materials is based on a fundamental understanding of the reaction mechanisms and a screening of stability.
Building a differential electrochemical mass spectrometer and reliable test cells is essential to obtain this understanding.
Further knowledge about reaction mechanisms and limiting factors of the battery will be sought by developing an electrochemical impedance spectroscopy model.

Biography

Jonathan Højberg received his Cand. Polyt. in Physics and Nanotechnology from the Technical University of Denmark (DTU) in 2011 with a specialization within atomic scale physics related to sustainable energy solutions.

He is currently pursuing a PhD within the field of Lithium-air batteries in a collaboration between DTU Energy Conversion and Haldor Topsøe A/S. He has been heavily engaged in building up state-of-the-art test facilities for Lithium-air batteries at both places and deciding which experiments to conduct.

Jonathan is highly motivated by the interplay between universities and industry, and how the synergies can accelerate the development of new and sustainable energy technologies. In 2009 he founded a company to leverage a newly developed technology to harvest ocean wave energy. The proof-of-concept was developed by making bachelor projects and courses for 15 students at DTU with different competences and coordinating this work. The work resulted in a top-3 in the national start-up competition Venture Cup in the cleantech category and the ideas were adapted in a national collaboration granted 48 MDKK by the Advanced Technology Foundation in 2011 to further develop the technology.

Besides ocean wave power and batteries, Jonathan has worked extensively with the development of cathode materials for Solid Oxide Fuel Cells at the Fuel Cells and Solid State Chemistry Division at Risø, DTU (now part of DTU Energy Conversion). The work focussed on building electrochemical models to describe the cathode, and identify and optimize the most important parameters.

Latest posts

  1. Highlights from Danish Battery Symposium 2016 — April 18, 2016
  2. Update from the Discussion Session on material testing — October 25, 2015
  3. Annual meeting in the Danish Electric Vehicle Alliance — October 25, 2015
  4. General Meeting 2015 — February 19, 2015
  5. Danish Battery Symposium 2015 — February 16, 2015

Author's posts

Highlights from Danish Battery Symposium 2016

The third annual symposium in the Danish Battery Society was hosted by DTU Energy in the comfortable meeting center at DTU Lyngby Campus. The ambition of this years symposium was different from previous years with a more open program to enable more networking and direct knowledge sharing. The speakers Don Siegel from University of Michigan and Kevin …

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Permanent link to this article: http://batteriselskab.dk/arrangement/highlights-from-danish-battery-symposium-2016.htm

Update from the Discussion Session on material testing

On 19 October 2015, Haldor Topsøe A/S hosted a discussion session on material testing. The intention was to discuss and align testing methods between companies and research institutions in Denmark and develop a common best practice. Around 20 people from universities and companies attended the meeting and presentations from five speakers on coating, coin cells, …

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Permanent link to this article: http://batteriselskab.dk/arrangement/update-from-the-discussion-session-on-material-testing.htm

Annual meeting in the Danish Electric Vehicle Alliance

On 25 November from 1 pm to 5 pm, the Danish Electric Vehicle Alliance host their annual meeting with the topic Battery development including talks from researchers, companies and politicians. Speakers include members of the Danish Battery Society Lars Barkler from Lithium Balance and Søren Dahl from Haldor Topsøe A/S. Details about the meeting and signup info is …

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Permanent link to this article: http://batteriselskab.dk/arrangement/annual-meeting-in-the-danish-electric-vehicle-alliance.htm

General Meeting 2015

All member of the Danish Battery Society are invited to our general meeting hosted by Department of Energy Technology at Aalborg University at 8.45 am before the Danish Battery Symposium 2015. The agenda is available here. We look forward to see you!

Permanent link to this article: http://batteriselskab.dk/arrangement/general-meeting-2015.htm

Danish Battery Symposium 2015

The second annual symposium in the Danish Battery Society is hosted by Ålborg university and focus on current and future battery activities in Denmark with updates from research and industry.   The agenda is available here, and presentations will, among others, cover: Battery assembling and packs Electrical luxury golf and leisure cars Battery material synthesis …

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Permanent link to this article: http://batteriselskab.dk/arrangement/danish-battery-symposium-2015.htm

Support for Danish EV tax exemption

In a new survey conducted by the Danish Society of Engineers, 74% of the Danes support continued tax exemption for electrical vehicles beyond 2015. Also, the sale of electrical vehicles increased to more than 1500 in 2014 (almost 1% of all cars sold in 2014).   Read the full article (in Danish) at IDA.dk.

Permanent link to this article: http://batteriselskab.dk/nyheder/support-for-danish-ev-tax-exemption.htm

Danish consortium receives 17 million € to develop electric short sea shipping

On 28 January 2015 it was announced that the Danish consortium Green Ferry Vision got a 17 million € grant from the EU Horizon 2020. The aim is to perform a feasibility study for the design, production and operation of an innovative low weight ferry for cars and passengers. The consortium is constituted by Siemens, the Transport Innovation Network and …

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Permanent link to this article: http://batteriselskab.dk/nyheder/danish-consortium-receives-17-million-e-to-develop-electric-short-sea-shipping.htm

New online discussion forum in the PhD network

We have launched a new forum in our PhD network to facilitate an easy and accessible way of sharing knowledge. Membership of the forum is required to post, but the discussions are public. Topics in the forum could be related to experimental best-practice, finding a reliable supplier and establishing collaboration on experimental techniques. Have a look at …

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Permanent link to this article: http://batteriselskab.dk/nyheder/new-online-discussion-forumin-the-phd-network.htm

Talk on recent advances in in-situ TEM on electrochemical systems

On Wednesday, 10 December 4.30pm – 6.30pm, Kristian Mølhave from DTU Nanotech is giving the talk The electrochemists’ wish list for getting a clear view to nanoscale processes The talk adresses the impressive recent advances in the possibilities for imaging processes in liquids with electron microscopes, as well as an update on the work at …

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Permanent link to this article: http://batteriselskab.dk/arrangement/praesentationer/talk-on-recent-advances-in-in-situ-tem-on-electrochemical-systems.htm

Public talk: Emerging Battery Technologies

The Danish Battery Society will host a public talk with IDA E and IDA Elteknik on Monday the 17st of November from 3pm to 6.30pm IDA Meeting Center, Kalvebod Brygge 31-33, 1780 Copenhagen This afternoon seminar will focus on two emerging battery technologies that are in the crucial phase just before a commercial breakthrough: Na-ion and Li-sulphur …

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Permanent link to this article: http://batteriselskab.dk/arrangement/public-talk-emerging-battery-technologies.htm

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