A5026550763- Advancements in Battery Materials
- Advanced Battery Technologies Research
- Advanced Battery Materials and Technologies
- Advancements in Solid Oxide Fuel Cells
- Electronic and Structural Properties of Oxides
- Electron and X-Ray Spectroscopy Techniques
- Non-Destructive Testing Techniques
- Fuel Cells and Related Materials
- Extraction and Separation Processes
- Advanced X-ray and CT Imaging
- Advanced Electron Microscopy Techniques and Applications
- Force Microscopy Techniques and Applications
- Electrocatalysts for Energy Conversion
- Magnetic and transport properties of perovskites and related materials
- Thermography and Photoacoustic Techniques
- Advanced battery technologies research
- High-pressure geophysics and materials
- Catalysis and Oxidation Reactions
- Nuclear Materials and Properties
- Electrical and Bioimpedance Tomography
- Advanced X-ray Imaging Techniques
- Nuclear Physics and Applications
- Supercapacitor Materials and Fabrication
- Power Transformer Diagnostics and Insulation
- Advancements in Photolithography Techniques
The Faraday Institution
2019-2025
University College London
2016-2025
Biochemical Society
2017-2025
ECSI Fibrotools (United States)
2022-2023
Research Complex at Harwell
2021
London Centre for Nanotechnology
2016-2020
Transnational Press London
2017-2020
Harvard University
2015
Abstract Driving range and fast charge capability of electric vehicles are heavily dependent on the 3D microstructure lithium-ion batteries (LiBs) substantial fundamental research is required to optimise electrode design for specific operating conditions. Here we have developed a full microstructure-resolved model using novel X-ray nano-computed tomography (CT) dual-scan superimposition technique that captures features carbon-binder domain. This elucidates how LiB performance markedly...
Internal short circuiting device for lithium-ion batteries.
Favorable conditions for lithium plating on graphite electrodes occur at high charge rates, causing accelerated degradation and safety concerns. A detailed map of lithiation dyamics is presented.
Abstract The next generation of automotive lithium‐ion batteries may employ NMC811 materials; however, defective particles are significant interest due to their links performance loss. Here, it is demonstrated that even before operation, on average, one‐third experience some form defect, increasing in severity near the separator interface. It determined can be detected and quantified using low resolution imaging, presenting a improvement for material statistics. Fluorescence diffraction data...
Abstract As the energy density of lithium‐ion cells and batteries increases, controlling outcomes thermal runaway becomes more challenging. If high rate gas generation during is not adequately vented, commercial cell designs can rupture explode, presenting serious safety concerns. Here, ultra‐high‐speed synchrotron X‐ray imaging used at >20 000 frames per second to characterize venting processes six different 18650 undergoing runaway. For first time, mechanisms that lead most catastrophic...
Battery performance is strongly correlated with electrode microstructural properties. Of the relevant properties, tortuosity factor of electrolyte transport paths through microstructure pores important as it limits battery maximum charge/discharge rate, particularly for energy-dense thick electrodes. Tortuosity however, difficult to precisely measure, and thus its estimation has been debated frequently in literature. Herein, three independent approaches have applied quantify lithium-ion The...
Abstract The temporally and spatially resolved tracking of lithium intercalation electrode degradation processes are crucial for detecting understanding performance losses during the operation lithium-batteries. Here, high-throughput X-ray computed tomography has enabled identification mechanical in a commercial Li/MnO 2 primary battery indirect diffusion; furthermore, complementary neutron identified direct diffusion process wetting by electrolyte. Virtual unrolling techniques provide...
Fracture of lithium-ion battery electrodes is found to contribute capacity fade and reduce the lifespan a battery. Traditional fracture models for batteries are restricted consideration single, idealised particle; here, advanced X-ray computed tomography (CT) imaging, an electro-chemo-mechanical model phase field framework combined predict void-driven in electrode particles realistic microstructure. The shown exhibit highly heterogeneous electrochemical response that depends on particle size...
The thermal response of Li-ion cells can greatly vary for identical cell designs tested under conditions, the distribution which is costly to fully characterize experimentally. open-source Battery Failure Databank presented here contains robust, high-quality data from hundreds abuse tests spanning numerous commercial and testing conditions. Data was gathered using a fractional runaway calorimeter breakdown heat mass that ejected, as well high-speed synchrotron radiography internal dynamic...
Mechanical abuse of lithium-ion batteries is widely used during testing to induce thermal runaway, characterize associated risks, and expose cell module vulnerabilities. However, the repeatability puncture or 'nail penetration' tests a key issue as there often high degree variability in resulting runaway process. In this work, failure mechanisms 18650 cells punctured at different locations orientations are characterized with respect their internal structural degradation, both surface...
Intentionally inducing worst-case thermal runaway scenarios in Li-ion cells on-demand is a definitive way to test the efficacy of battery systems safely mitigating consequences catastrophic failure. An internal short-circuiting (ISC) device implanted into three 18650 cell designs: one standard, with bottom vent, and thicker casing. Through an extensive study 228 cells, position at which initiates shown greatly affect tendency rupture incur side-wall breaches specific locations. The risks...
Optimizing the chemical and morphological parameters of lithium-ion (Li-ion) electrodes is extremely challenging, due in part to absence techniques construct spatial temporal descriptions heterogeneities. We present first demonstration combined high-speed X-ray diffraction (XRD) XRD computed tomography (XRD-CT) probe, 3D, crystallographic heterogeneities within Li-ion with a resolution 1 μm. The local charge-transfer mechanism between individual particles was investigated...
Abstract The performance of lithium ion electrodes is hindered by unfavorable chemical heterogeneities that pre-exist or develop during operation. Time-resolved spatial descriptions are needed to understand the link between such and a cell’s performance. Here, operando high-resolution X-ray diffraction-computed tomography used spatially temporally quantify crystallographic within particles throughout both fresh degraded Li x Mn 2 O 4 electrodes. This imaging technique facilitates...
Abstract Ceramic fuel cells offer a clean and efficient means of producing electricity through variety fuels. However, miniaturization cell dimensions for portable device application remains challenge, as volumetric power densities generated by readily-available planar/tubular ceramic are limited. Here, we demonstrate concept ‘micro-monolithic’ design. The mechanical robustness structural integrity this design is thoroughly investigated with real-time, synchrotron X-ray diffraction computed...
Microstructural design strategies across multiple length scales for improved rate performance of automotive battery electrodes, assisted by physics-based microstructure-resolved model.
Abstract Demand for low carbon energy storage has highlighted the importance of imaging techniques characterization electrode microstructures to determine key parameters associated with battery manufacture, operation, degradation, and failure both next generation lithium other novel systems. Here, recent progress literature highlights from magnetic resonance, neutron, X‐ray, focused ion beam, scanning transmission electron microscopy are summarized. Two major trends identified: First, use...
Establishing the nature of crack generation, formation, and propagation is paramount to understanding degradation modes that govern decline in battery performance.
Multi-scale microstructure and flow physics investigations reveal the enhancement of mass transport by hierarchical-structured SOFC anodes fabricated Phase Inversion.
This study aims to correlate the active triple phase boundaries (TPBs) variation of as-prepared anode microstructures and Ni densifications based on reconstructed 3D volume an SOFC anode, providing a point comparison with theoretical studies that reveal relationship TPBs material microstructure using randomly packed spheres models. The TPB degradation mechanisms are explained particle network model. results indicate in low porosity regime, sharply increase until percolation threshold (10%);...