A5105353135- Advanced battery technologies research
- Advancements in Battery Materials
- Advanced Battery Technologies Research
- Electrocatalysts for Energy Conversion
- Fuel Cells and Related Materials
- Electron and X-Ray Spectroscopy Techniques
- Advanced Battery Materials and Technologies
- Supercapacitor Materials and Fabrication
- Advancements in Solid Oxide Fuel Cells
- Industrial Vision Systems and Defect Detection
- Graphene research and applications
- Conducting polymers and applications
- Electrical and Bioimpedance Tomography
- Transition Metal Oxide Nanomaterials
- Analytical Chemistry and Sensors
- Gas Sensing Nanomaterials and Sensors
- Electric and Hybrid Vehicle Technologies
- Semiconductor materials and interfaces
- Microgrid Control and Optimization
- Electrochemical Analysis and Applications
- Smart Grid Energy Management
- Perovskite Materials and Applications
- Silicon Carbide Semiconductor Technologies
- Ionic liquids properties and applications
- Machine Learning in Materials Science
Imperial College London
2012-2022
Transnational Press London
2020
IQ Samhällsbyggnad
2017
Kensington Health
2015
The London College
2014
Tel Aviv University
2001-2007
Autonomous MEMS require similarly miniaturized power sources. In this paper, we present the first working three-dimensional (3-D) rechargeable Li-ion thin-film microbattery technology that is compatible with requirements. The has been developed, and full 3-D cells have manufactured on both glass silicon substrates. Our microbatteries a sandwich-like structure of conformal electrodes, electrolyte current collectors. films are deposited sequentially all available surfaces perforated substrate...
The porous structure of the electrodes in redox flow batteries (RFBs) plays a critical role their performance. We develop framework for understanding coupled transport and reaction processes by combining lattice Boltzmann modelling (LBM) with experimental measurement electrochemical performance X-ray computed tomography (CT). 3D pore-scale LBM simulations non-aqueous RFB are conducted on detailed microstructure three different (Freudenberg paper, SGL paper carbon cloth) obtained using CT....
Recent advances in high‐resolution 3D X‐ray computed tomography (CT) allow detailed, non‐destructive structural mapping of a complete lithium‐ion battery. By repeated image acquisition (time lapse CT imaging) these investigations material microstructure are extended into the fourth dimension (time) to study changes device operando. digital volume correlation (DVC) successive images dimensional taking place during charge cycling quantified at electrode level and Mn 2 O 4 particle scale. After...
Silicon-Lithium based rechargeable batteries offer high gravimetric capacity. However cycle life and electrode microstructure failure mechanisms remain poorly understood. Here we present an X-ray tomography method to investigate in-operando lithiation induced stress cracking leading the delamination of a composite Si electrode. Simultaneous voltage measurements show increased cell resistance correlating with severe microstructural changes. 3D analysis revealed 44.1% loss initial...
The purpose of this work is to assess the suitability potential electrolyte additives for zinc morphology control and improved electrochemical performance electrode application in based redox flow battery (RFB) systems. Based on existing literature field, sixteen candidates are selected, including four metallic additives, two non-ionic surfactants ten quaternary ammonium compounds. assessed using cyclic voltammetry, linear sweep voltammetry half-cell cycling tests chronopotentiometry. Zinc...
With the rapid development of renewable energy harvesting technologies, there is a significant demand for long-duration storage technologies that can be deployed at grid scale. In this regard, polysulfide-air redox flow batteries demonstrated great potential. However, crossover polysulfide one challenge. Here, we report stable and cost-effective alkaline-based hybrid battery where dual-membrane-structured cell design mitigates sulfur issue. Moreover, combining manganese/carbon catalysed air...
A novel regenerative cell based on aqueous vanadium electrolyte V(V)/V(IV) and hydrogen was designed, assembled tested. This offers several potential advantages for grid scale storage applications through its use of a gaseous anolyte coupled with liquid catholyte. Charge discharge experiments at different conditions showed encouraging reversibility performance from the first tests concept presented here. The maximum power density achieved 114 mW/cm2 area 25 cm2, supporting analysis voltage...
A novel regenerative hydrogen cerium fuel cell is presented which has the potential to deliver both low cost and high performance.
Results reveal counter-intuitive behaviors of the electrolyte flow whereby capillary driven is secondary to primary wetting mechanisms.
Electrochemical energy storage is a key enabling technology for further integration of renewables sources. Redox flow batteries (RFBs) are promising candidates such applications as result their durability, efficiency and fast response. However, deployment existing RFBs hindered by the relatively high cost (typically vanadium-based) electrolyte. Manganese an earth-abundant inexpensive element that widely used in disposable alkaline batteries. However it has hitherto been little explored due...
Common issues aqueous-based vanadium redox flow batteries (VRFBs) face include low cell voltage due to water electrolysis side reactions and highly corrosive environmentally unfriendly electrolytes (3 5 M sulfuric acid). Therefore, this investigation looks into the comparison of a conductive ionic liquid with well-studied deep eutectic solvent (DES) as for non-aqueous VRFBs. The latter gives 50% higher efficiency capacity utilization than former. These figures merit increase by 10% when...
There is a potential for silver nanowires (AgNWs) to be inhaled, but there little information on their health effects and chemical transformation inside the lungs in vivo. We studied of short (S-AgNWs; 1.5 μm) long (L-AgNWs; 10 instilled into Sprague-Dawley rats. S- L-AgNWs were phagocytosed degraded by macrophages; was no frustrated phagocytosis. Interestingly, both AgNWs internalized alveolar epithelial cells, with precipitation Ag2S surface as secondary nanoparticles. Quantitative serial...
Hybrid redox flow cells (HRFC) are key enablers for the development of reliable large-scale energy storage systems; however, their high cost, limited cycle performance, and incompatibilities associated with commonly used carbon-based electrodes undermine HRFC's commercial viability. While this is often linked to lack suitable electrocatalytic materials capable coping HRFC electrode processes, combinatory use nanocarbon additives carbon paper holds new promise. Here, by coupling...
In this study we present a novel method of lithium ion battery electrode sample preparation with new type epoxy impregnation, brominated (Br) epoxy, which is introduced here for the first time purpose and found suitable focused beam scanning electron microscope (FIB-SEM) tomography. The Br improves image contrast, enables higher FIB-SEM resolution (3D imaging), amongst highest ever reported composite LFP cathodes using FIB-SEM. turn it means that particles are well defined size distribution...
Abstract Reduced graphene oxide (rGO) suspended in an N , N′ ‐dimethylformamide (DMF) solvent underwent electrophoretic deposition (EPD) on carbon paper (CP) electrodes. X‐ray computed micro‐tomography (XMT) indicates a 24 % increase the specific surface area of CP modified with rGO comparison to untreated sample. Furthermore, XMT confirms that also penetrates into substrate. Raman analysis shows deposited is more amorphous than electrode. A significant reduction charge‐transfer resistance...