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4D Bragg edge tomography of directional ice templated graphite electrodes

DOI: 10.3390/jimaging6120136 DOI Help

Authors: Ralf F. Ziesche (University College London (UCL); The Faraday Institution; Diamond Light Source; ISIS Facility) , Anton S. Tremsin (University of California, Berkeley) , Chun Huang (University of Oxford; King’s College London) , Chun Tan (University College London (UCL); The Faraday Institution) , Patrick S. Grant (The Faraday Institution; University of Oxford) , Malte Storm (Diamond Light Source) , Dan J. L. Brett (University College London (UCL); The Faraday Institution) , Paul Shearing (University College London (UCL); The Faraday Institution) , Winfred Kockelmann (ISIS Facility)
Co-authored by industrial partner: No

Type: Journal Paper
Journal: Journal Of Imaging , VOL 6

State: Published (Approved)
Published: December 2020
Diamond Proposal Number(s): 22976

Open Access Open Access

Abstract: Bragg edge tomography was carried out on novel, ultra-thick, directional ice templated graphite electrodes for Li-ion battery cells to visualise the distribution of graphite and stable lithiation phases, namely LiC12 and LiC6. The four-dimensional Bragg edge, wavelength-resolved neutron tomography technique allowed the investigation of the crystallographic lithiation states and comparison with the electrode state of charge. The tomographic imaging technique provided insight into the crystallographic changes during de-/lithiation over the electrode thickness by mapping the attenuation curves and Bragg edge parameters with a spatial resolution of approximately 300 µm. This feasibility study was performed on the IMAT beamline at the ISIS pulsed neutron spallation source, UK, and was the first time the 4D Bragg edge tomography method was applied to Li-ion battery electrodes. The utility of the technique was further enhanced by correlation with corresponding X-ray tomography data obtained at the Diamond Light Source, UK.

Journal Keywords: time-of-flight; energy-resolved imaging; Bragg edge imaging; neutron tomography; Li-ion battery; directional ice templated electrode

Diamond Keywords: Batteries; Lithium-ion

Subject Areas: Materials, Physics, Technique Development

Instruments: I13-2-Diamond Manchester Imaging

Other Facilities: ISIS

Added On: 15/12/2020 09:49


Discipline Tags:

Energy Storage Energy Physics Energy Materials Technique Development - Physics Materials Science

Technical Tags:

Imaging Tomography