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Investigating the effect of thermal gradients on stress in solid oxide fuel cell anodes using combined synchrotron radiation and thermal imaging

DOI: 10.1016/j.jpowsour.2015.04.104 DOI Help

Authors: James Robinson (University College London (UCL)) , Leon D. Brown (UCL) , Rhodri Jervis (University College London) , Oluwadamilola Taiwo (University College London) , Thomas M.m. Heenan (UCL) , Jason Millichamp (UCL) , Thomas J. Mason (UCL) , Tobias P. Neville (UCL) , Ralph Clague (Intelligent Energy) , David Eastwood (Rutherford Appleton Laboratory) , Christina Reinhard (Diamond Light Source) , P.d Lee (Unversity of Manchester) , Daniel J.l. Brett (UCL) , Paul R. Shearing (UCL)
Co-authored by industrial partner: No

Type: Journal Paper
Journal: Journal Of Power Sources , VOL 288 , PAGES 473 - 481

State: Published (Approved)
Published: August 2015
Diamond Proposal Number(s): 8612

Open Access Open Access

Abstract: Thermal gradients can arise within solid oxide fuel cells (SOFCs) due to start-up and shut-down, non-uniform gas distribution, fast cycling and operation under internal reforming conditions. Here, the effects of operationally relevant thermal gradients on Ni/YSZ SOFC anode half cells are investigated using combined synchrotron X-ray diffraction and thermal imaging. The combination of these techniques has identified significant deviation from linear thermal expansion behaviour in a sample exposed to a one dimensional thermal gradient. Stress gradients are identified along isothermal regions due to the presence of a proximate thermal gradient, with tensile stress deviations of up to 75 MPa being observed across the sample at a constant temperature. Significant strain is also observed due to the presence of thermal gradients when compared to work carried out at isothermal conditions.

Journal Keywords: X-Ray Diffraction; Solid Oxide Fuel Cell; Infrared Imaging; Thermal Imaging; Stress Analysis; Synchrotron Radiation

Subject Areas: Energy, Materials, Engineering
Collaborations: Diamond Manchester

Instruments: I12-JEEP: Joint Engineering, Environmental and Processing

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