A5024746695- Advancements in Battery Materials
- Advancements in Solid Oxide Fuel Cells
- Advanced Battery Technologies Research
- Advanced Battery Materials and Technologies
- Fuel Cells and Related Materials
- Extraction and Separation Processes
- Electronic and Structural Properties of Oxides
- Chemical Looping and Thermochemical Processes
- Catalysis and Oxidation Reactions
- Electrocatalysts for Energy Conversion
- Ferroelectric and Piezoelectric Materials
- Electrochemical Analysis and Applications
- Metal Extraction and Bioleaching
- Catalytic Processes in Materials Science
- Supercapacitor Materials and Fabrication
- Smart Materials for Construction
- Perovskite Materials and Applications
- Catalysts for Methane Reforming
- Aerosol Filtration and Electrostatic Precipitation
- Machine Learning in Materials Science
- Phase Change Materials Research
- Carbon dioxide utilization in catalysis
- Fiber-reinforced polymer composites
- Advanced ceramic materials synthesis
- Conducting polymers and applications
University of Sheffield
2015-2024
The Faraday Institution
2021-2023
Imperial College London
2005-2011
Ceres Power (United Kingdom)
2004
The University of Queensland
2003
Ceramics based on solid solutions of x BaTiO 3 –(100− )(0.5 Bi ( Zn 1/2 Ti ) O –0.5 BiScO ), where = 50, 55, and 60 were prepared by solid‐state reaction which resulted in a single perovskite phase with pseudocubic symmetry. Dielectric property measurements revealed high relative permittivity (>1000), could be modified the addition BZT BS to engineer temperature‐stable dielectric response temperature coefficient (TCε) as low −182 ppm/°C. By incorporating 2 mol% Ba vacancies into...
Lithium-ion battery electrodes are on course to benefit from current research in structure re-engineering allow for the implementation of thicker electrodes. Increasing thickness a electrode enables significant improvements gravimetric energy density while simultaneously reducing manufacturing costs. Both metrics critical if transition sustainable transport systems is be fully realized commercially. However, barriers exist that prevent use such microstructures: performance issues,...
Abstract Growth in the Li-ion battery market continues to accelerate, driven primarily by increasing need for economic energy storage electric vehicles. Electrode manufacture slurry casting is first main step cell production but much of manufacturing optimisation based on trial and error, know-how individual expertise. Advancing science that underpins electrode critical adding value chain. Overcoming current barriers requires advances materials, technology, in-line process metrology data...
High energy and power density are key requirements for next-generation lithium-ion batteries. One way to improve the former is reduce binder conductive additive content. Carbon black an important that facilitates electronic conduction in batteries affects domain although it only occupies 5–8% of electrode mass. However, function structure carbon on short- long-range contacts pores still not clear has been systematically researched detail. In this work, five blacks with different BET surface...
The incorporation of metal nanoparticles within various types photovoltaic technologies has been shown to increase the performance organic solar cells, dye sensitized and more recently perovskite cells. Using this type nanostructured composite transport layer could help improve efficiency stability cells whilst avoiding use dopants that can damage layer. In work, Ag are synthesized used form a SnO2:Ag nanoparticle for first time. On its own, SnO2 is in one most efficient layers Upon...
Bilayer electrolytes have potential in solid oxide cells to improve ionic conduction whilst blocking electronic conduction. GDC/YSZ bilayer electrolyte processing has proven problematic due thermochemical instability at high sintering temperatures. We first match the shrinkage profile of two bulk materials using a Fe2O3 additive. Additions 5 mol% GDC layer and 2 YSZ prevents delamination during co-sintering. The addition promotes densification, enabling achievement dense reduced temperature...
Calendering is an essential process step to manufacture electrodes for lithium-ion batteries. The relationship between the various component material properties and calendering conditions has a large impact on battery performance. In this work, Discrete Element Method (DEM) was used investigate electrode structure evolution under different conditions. initial positions of active (AM) particles were obtained from uncalendered microstructure characterised experimentally by X-ray tomography...
Lithium-ion battery (LIB) performance can be significantly affected by the nature of complex electrode microstructure. The carbon binder domain (CBD) present in almost all LIB electrodes is used to enhance mechanical stability and facilitate electronic conduction, understanding CBD phase microstructure how it affects coupled transport processes crucial optimization. In this work, influence microporosity has been studied detail for first time, enabling insight into relationships between...
A novel metal supported Solid Oxide Fuel Cell has been developed, capable of operating at temperatures 500-600°C. The rationale behind the materials used to construct this fuel cell type is given, and results presented from short stack testing, including durability thermal cycling trials. This new variant shown be tolerant carbon monoxide durable, robust redox cycling, delivering technologically relevant power densities.
Abstract The use of silica as a lithium‐ion battery anode material requires pretreatment step to induce electrochemical activity. partially reversible reduction reaction between and lithium has been postulated produce silicon, which can subsequently reversibly react with lithium, providing stable capacities higher than graphite materials. Up now, the pathway nature products were unknown, thereby hampering design, optimization, wider uptake silica‐based anodes. Here, is uncovered and, for...
The copper current collector induces side reaction with metal sulphide due to formation while cycling. carbon-coated aluminium foil was an ideal in terms of inertness anodes and low resistivity.
Cation‐stoichiometric and strontium‐deficient Sr 1− x Ce TiO 3 ± δ (0< <0.15) have been appraised using controlled‐atmosphere dilatometry, thermogravimetric analysis, measurements of total conductivity Seebeck coefficient in the oxygen partial pressure range from 10 −20 to 0.5 atm at 650°–950°C. As for other donor‐doped titanates, perovskite‐type exhibit predominant n ‐type electronic slow changes charge‐compensation mechanism on reduction, associated with kinetically stagnated...
There is an urgent need for alternative sources of graphite, to satisfy the demands a number industries, including use in lithium-ion battery production. Spent potlining (SPL) represents attractive potential source such but requires detoxification allow valorisation its carbonaceous fraction. We present here simple decontamination process SPL, based on two-stage caustic/acidic leaching, and demonstrate how recovered graphite may be fabricated into Li-ion electrodes. The recycled batteries...
Donor-doped strontium titanate represents an interesting class of materials for novel applications in solid oxide fuel cells. We have prepared three different stoichiometries, Sr1−xCexTiO3±δ, Sr1−1.5xCexTiO3±δ and Sr1−2xCexTiO3±δ (0.05< x <0.15) to examine structural properties when air. found that no matter what the starting stoichiometry, would always preferentially form. This agrees with current defect model donor-doped titanate. When examined using X-ray diffraction samples appeared be...
Co-electrolysis of carbon dioxide and steam has been shown to be an efficient way produce syngas, however further optimisation requires detailed understanding the complex reactions, transport processes degradation mechanisms occurring in solid oxide cell (SOC) during operation. Whilst electrochemical measurements are currently conducted situ, many analytical techniques can only used ex situ may even destructive (e.g. SEM imaging microstructure). In order fully understand characterise...