Project

Heat treatment of electrospun nanofiber materials for solid oxide electrolysis application

Publisher

Supervisor

Location

Greater Copenhagen area

Type of project

Experimental

Purpose

The purpose of the project is to study the structural response of electrospun nanofibers to heat treatment processes.

The experimental work

The main material that you will be working with are electrospun nanofibers of gadolium-doped ceria (CGO) and if time allows, nanofibers of other solid oxide electrolysis materials.

You will be using chamber furnace/s for the heat treatment and will be given safety introduction and training accordingly. Aside from this, you will also be trained in operating an x-ray diffraction (XRD) machine, transmission electron microscope (TEM), and scanning electron microscope (SEM), as well as using energy dispersive spectroscopy (EDS).

The main scope of the experimental work will be the determination of the effect of heat treatment process and parameters (e.g. temperature, time, ramping rate) on the structural changes of the electrospun nanofibers. This would include the decomposition of the polymer components and most especially, the morphological and crystallographic changes in the CGO material.

Background

The transition from fossil fuels to renewables hinges on the successful storage of excess solar and wind energy. A promising energy storage method is high-temperature electrolysis via SOECs. In our EU funded project HEIST, we are developing a method to study active electrolysis cells in a TEM.

The use of nanofibers in solid oxide electrolysis cells shows great potential due to its high strength, conductivity, surface area, and porosity. It’s also advantageous to use this type of material in the in-situ EIS-TEM characterization method being developed by our project as the material is already electron transparent for the TEM, therefore, no further thinning of the material is needed.

The nanofibers are produced by electrospinning, i.e. the as-spun nanofibers come with polymer, nitrite salts, and other components of the precursor solution. These have to be decomposed and removed through heat treatment (calcination and sintering) to produce the metal oxide nanofibers. To achieve high performance of the nanofiber materials, the heat treatment process should be optimal, such that the polymer binder and other precursor components are fully removed without losing the desired structure and properties of the metal oxide material for SOEC applications.

Your TEAM

We think team spirit is important. You will be part of the HEIST team, which consists of a handful of researchers primarily from DTU Energy. Your main supervisor will be Søren Bredmose Simonsen who is the principle investigator in HEIST. You will work closely together with Waynah Dacayan who will be co-supervising the project.

Competences after the project

·       Hands-on experience with XRD, TEM, SEM, and EDS

  • Theoretical knowledge and experience with oxide nanostructures
  • Knowledge about solid oxide electrolysis cells

Prerequisites

Knowledge in solid state physics/chemistry, crystallography, and electron microscopy is an advantage






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Contact

Company / Organization

DTU Energi

Name

Søren Bredmose Simonsen

Position

Seniorforsker

Mail

sobrs@dtu.dk

Supervisor info

MSc Eng in Applied Chemistry

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Søren Bredmose Simonsen

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Waynah Lou Verdin Dacayan

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Søren Bredmose Simonsen

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Type

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Technical University of Denmark

For almost two centuries DTU, Technical University of Denmark, has been dedicated to fulfilling the vision of H.C. Ørsted – the father of electromagnetism – who founded the university in 1829 to develop and create value using the natural sciences and the technical sciences to benefit society.


Today, DTU is ranked as one of the foremost technical universities in Europe, continues to set new records in the number of publications, and persistently increases and develops our partnerships with industry, and assignments accomplished by DTU’s public sector consultancy.

Find us here

Anker Engelunds Vej 1
Bygning 101A
2800 Kgs. Lyngby

Denmark



Tlf. (+45) 45 25 25 25

CVR-nr. 30 06 09 46

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