A5027723032- Advanced Battery Technologies Research
- Advancements in Battery Materials
- Advanced Battery Materials and Technologies
- Extraction and Separation Processes
- Conducting polymers and applications
- Supercapacitor Materials and Fabrication
- Urbanization and City Planning
- Fault Detection and Control Systems
- Risk and Safety Analysis
- Electrocatalysts for Energy Conversion
- Electron and X-Ray Spectroscopy Techniques
- Regional Socio-Economic Development Trends
- Advanced battery technologies research
- Combustion and Detonation Processes
- Electrical and Bioimpedance Tomography
- Nuclear Physics and Applications
University College London
2018-2024
University College Lahore
2022
UCL Australia
2019
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...
Isolating electronically conducting material from internal short circuits is a promising way to prevent the onset of thermal runaway within lithium-ion cells. Here, metal-coated polymer current collector, which designed disconnect by withdrawing heating region, tested in 18650 In addition having lower mass and manufacturing costs, cells with collectors demonstrate reduced risk during nail penetration. High-speed synchrotron X-ray radiography nail-penetration testing, tandem pre- post-mortem...
Thermal runaway of lithium-ion batteries can involve various types failure mechanisms each with their own unique characteristics. Using fractional thermal calorimetry and high-speed radiography, the response three different geometries cylindrical cell (18650, 21700, D-cell) to abuse (thermal, internal short circuiting, nail penetration) are quantified statistically examined. Correlations between geometry cells behavior identified, such as increasing heat output per amp-hour (kJ Ah −1 )...
Activated carbons, with different surface chemistry and porous textures, were used to study the mechanism of electrochemical hydrogen oxygen evolution in supercapacitor devices. Cellulose precursor materials activated potassium hydroxide (KOH) ratios, behaviour was studied 6 M KOH electrolyte. In situ Raman spectra collected obtain structural changes carbons under severe oxidation reduction conditions, obtained data correlated cyclic voltammograms at high anodic cathodic potentials....
Lithium ion battery failure occurs across multiple length scales. In this work, the properties of thermal and its effects on electrode materials were investigated in a commercial using combination accelerating rate calorimetry (ARC) multi-length scale X-ray computed tomography (CT). ARC measured heat dissipated from cell during runaway enabled identification key characteristics such as onset temperature generation failure. Analysis before after scanning electron microscopy (SEM) CT performed...
Abstract Zinc–air batteries have gained significant attention as safe battery alternatives, with high theoretical energy densities and a abundance of their constituent materials. However, barriers to widespread adoption include the need improve cycling lifetime, well stability avoiding degradation mechanisms such zinc dendrite growth hydrogen-producing side reactions. X-ray computed tomography (CT) is widely used technique for study batteries. In situ / operando x-ray CT has been...
The assessment of lithium-ion battery (LIB) safety is a multiscale challenge: from the whole-cell architecture to its composite internal three-dimensional (3D) microstructures. Substantial research required standardise failure assessments and optimise cell designs reduce risks LIB failure. In this two-part work, response 1 Ah layered pouch with commercially available nickel manganese cobalt (NMC) cathode graphite anode at 100% state charge (SOC) (4.2 V) investigated. mechanisms two abuse...
In Part I (), the failure response of a 1 Ah layered pouch cell with commercially available nickel manganese cobalt (NMC) cathode and graphite anode at 100% state charge (SOC) (4.2 V) was investigated for two mechanisms: thermal mechanical. The architectural changes to whole-cell deformations electrode layers are analysed after both mechanisms. A methodology post-mortem disassembly sample preparation is proposed demonstrated effectively analyse surfaces, bulk microstructures particle...
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...
The safety of concerns lithium-ion batteries continues to be a prevalent obstacle toward their widespread application from vehicle electrification space exploration. Aside the highly oxidising and reducing electrode materials, is compounded by an inherent drawback poor heat dissipation [1]. High-speed imaging with in-situ/operando X-ray CT has been used extensively study various battery features failure mechanisms [2][3], including thermal [4]. However, these are exclusively using...