Journal
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS
Volume 324, Issue -, Pages 118-123Publisher
ELSEVIER
DOI: 10.1016/j.nimb.2013.08.066
Keywords
X-ray nano-CT; Lithium-ion battery; Phase contrast; Zernike; Phase retrieval
Categories
Funding
- EPSRC [EP/F007906/1, EP/F001452/1, EP/I02249X/1]
- UK EPSRC
- Royal Academy of Engineering
- Office of Naval Research Global
- Engineering and Physical Sciences Research Council [EP/F007906/1, EP/I02249X/1, 1272545, EP/J003085/1, EP/F001452/1] Funding Source: researchfish
- EPSRC [EP/J003085/1, EP/I02249X/1, EP/F001452/1, EP/F007906/1] Funding Source: UKRI
Ask authors/readers for more resources
In order to accelerate the commercialization of fuel cells and batteries across a range of applications, an understanding of the mechanisms by which they age and degrade at the microstructural level is required. Here, the most widely commercialized Li-ion batteries based on porous graphite based electrodes which de/intercalate Li+ ions during charge/discharge are studied by two phase contrast enhanced X-ray imaging modes, namely in-line phase contrast and Zernike phase contrast at the micro (synchrotron) and nano (laboratory X-ray microscope) level, respectively. The rate of charge cycling is directly dependent on the nature of the electrode microstructure, which are typically complex multi-scale 3D geometries with significant microstructural heterogeneities. We have been able to characterise the porosity and the tortuosity by micro-CT as well as the morphology of 5 individual graphite particles by nano-tomography finding that while their volume varied significantly their sphericity was surprisingly similar. The volume specific surface areas of the individual grains measured by nano-CT are significantly larger than the total volume specific surface area of the electrode from the micro-CT imaging, which can be attributed to the greater particle surface area visible at higher resolution. (C) 2014 Elsevier B.V. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available