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Instruments / Technical Area	Publication Details	Published
I12-JEEP: Joint Engineering, Environmental and Processing	Correlative full field X-ray Compton scattering imaging and X-ray computed tomography for in situ observation of Li ion batteries Chu Lun Alex Leung , Matthew D. Wilson , Thomas Connolley , Stephen P. Collins , Oxana V. Magdysyuk , Matthieu N. Boone , Kosuke Suzuki , Matthew C. Veale , Enzo Liotti , Frederic Van Assche , Andrew Lui , Chun Huang Materials Today Energy 306 DOI: 10.1016/j.mtener.2022.101224 Diamond Proposal Number(s): [23400] Open Access Show Abstract ▼ Abstract: Increasing electrode thickness is gaining more attention as a potential route to increase energy density for Li ion batteries although the realizable capacity and rate capability are usually limited by Li+ ion diffusion during (dis)charge, especially at increased (dis)charge rates. It remains challenging to visualize and quantify the low atomic number Li+ chemical stoichiometry distribution inside the electrode within commercially standard battery geometry, e.g., coin cells with stainless steel casings. Here, we map the distribution of Li+ chemical stoichiometry in the electrode microstructure inside a working coin cell battery to show the amount of electrode materials contributing to energy storage performance using innovative in situ correlative full-field X-ray Compton scattering imaging (XCS-I) and X-ray computed tomography (XCT). We design and fabricate an ultra-thick (∼1 mm) cathode of LiNi0.8Mn0.1Co0.1O2 with a microstructure containing vertically oriented pore arrays using a directional ice templating method. This novel technique paves a new way to map low atomic number elements in 3D structures and study how the microstructure improves Li+ ion diffusivity and energy storage performance.	Dec 2022
Detectors Optics	Energy dispersive detector for white beam synchrotron x-ray fluorescence imaging Matthew Wilson , Thomas Connolley , Igor P. Dolbnya , Patrick S. Grant , Enzo Liotti , Andrew Lui , Andrew Malandain , K. Sawhney , Paul Seller , Mattew C. Veale 12th International Conference on Synchrotron Radiation Instrumentation (SRI2015) DOI: 10.1063/1.4952928 Show Abstract ▼ Abstract: A novel, “single-shot” fluorescence imaging technique has been demonstrated on the B16 beamline at the Diamond Light Source synchrotron using the HEXITEC energy dispersive imaging detector. A custom made furnace with 200µm thick metal alloy samples was positioned in a white X-ray beam with a hole made in the furnace walls to allow the transmitted beam to be imaged with a conventional X-ray imaging camera consisting of a 500 µm thick single crystal LYSO scintillator, mirror and lens coupled to an AVT Manta G125B CCD sensor. The samples were positioned 45° to the incident beam to enable simultaneous transmission and fluorescence imaging. The HEXITEC detector was positioned at 90° to the sample with a 50 µm pinhole 13cm from the sample and the detector positioned 2.3m from pinhole. The geometric magnification provided a field of view of 1.1×1.1mm2 with one of the 80×80 pixels imaging an area equivalent to 13µm2. Al-Cu alloys doped with Zr, Ag and Mo were imaged in transmission and fluorescence mode. The fluorescence images showed that the dopant metals could be simultaneously imaged with sufficient counts on all 80x80 pixels within 60s, with the X-ray flux limiting the fluorescence imaging rate. This technique demonstrated that it is possible to simultaneously image and identify multiple elements on a spatial resolution scale ~10µm or higher without the time consuming need to scan monochromatic energies or raster scan a focused beam of X-rays. Moving to high flux beamlines and using an array of detectors could improve the imaging speed of the technique with element specific imaging estimated to be on a 1s timescale.	Nov 2016
B16-Test Beamline	A Synchrotron X-ray Radiography Investigation of Induced Dendrite Fragmentation in Al-15wt%Cu Enzo Liotti , Andrew Lui , Robin Vincent , Sundaram Kumar , Zhipeng Guo , Mike Hart , Lars Arnberg , Ragnvald Mathiesen , Patrick Grant , Thomas Connolley Light Metals Technology 2013 DOI: 10.4028/www.scientific.net/MSF.765.210 Diamond Proposal Number(s): [8191] Show Abstract ▼ Abstract: Solidification, Time resolved radiography, Pulsed electro magnetic field, Dendrite fragmentation, Al-Cu alloy, Diamond Light Source	Jul 2013

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