A5011154030- Advanced Sensor and Energy Harvesting Materials
- Advancements in Battery Materials
- Nanomaterials and Printing Technologies
- Advanced Battery Materials and Technologies
- Ferroelectric and Piezoelectric Materials
- Diamond and Carbon-based Materials Research
- Energy Harvesting in Wireless Networks
- Dielectric materials and actuators
- Surface Modification and Superhydrophobicity
- Force Microscopy Techniques and Applications
- Organic Light-Emitting Diodes Research
- Plasma Applications and Diagnostics
- Innovative Energy Harvesting Technologies
- Advanced Battery Technologies Research
- Additive Manufacturing and 3D Printing Technologies
- High voltage insulation and dielectric phenomena
- Antenna Design and Analysis
- Ion-surface interactions and analysis
- X-ray Diffraction in Crystallography
- Multiferroics and related materials
- Nuclear Physics and Applications
- Solid-state spectroscopy and crystallography
- Advanced Memory and Neural Computing
- Electronic and Structural Properties of Oxides
- Fuel Cells and Related Materials
Luxembourg Institute of Science and Technology
2016-2024
University of Bath
2011
Competitive cooling with capacitors Current large-scale devices use vapor compression refrigeration. The efficiency of air conditioners has been optimized, but they can be noisy and rely on problematic greenhouse gases. Two groups now present designs for electrocaloric using lead scandium tantalate that change temperature under an electric field. Y. Wang et al. obtained a very large heat flux only solid materials fan to remove from their device. Torello used fluids transfer, leading...
In this paper, an electrocaloric (EC) cooler prototype made of 150 ceramic-based Multi-Layer Capacitors (MLCs) has been detailed. This involves a column dielectric fluid where heat exchange with the MLCs takes place. The maximum variation temperature in due to EC effect reaches 0.13 K whereas exchanged during one stroke is 0.28 J. Although requires improvements respect exchange, basic principle creating gradient validated.
Energy harvesters are required for autonomous sensors. The field is still missing a low-cost technology that would provide enough power tangible low-frequency use cases, although triboelectric nanogenerators (TENG) have emerged as new energy technology. Standard vibration (VEHs) based either on bulky electromagnetic systems or stiff lead-based piezo-ceramics. Those rarely compatible with large deformations occur at low frequency such body movements. Here, we show stack of 10 thin layers...
State-of-the-art secondary ion mass spectrometry (SIMS) instruments allow producing 3D chemical mappings with excellent sensitivity and spatial resolution. Several important artifacts however arise from the fact that SIMS mapping does not take into account surface topography of sample. In order to correct these artifacts, we have integrated a specially developed scanning probe microscopy (SPM) system commercial Cameca NanoSIMS 50 instrument. This new SPM module, which was designed as DN200CF...
The most promising materials to replace indium tin oxide (ITO) in transparent electrodes could be silver nanowires. One of the challenges is, however, large-scale deposition This study provides a solution deposit nanowires on large substrate area by spray deposition. new concept is heated glass vertical position with flat beam instead basic conic beam. After optimization parameters such as cleaning, droplets size, pressure, and distance, surface 100 cm2 was fully covered very good...
The global transition from fossil fuels to green energy underpins the need for efficient and reliable storage systems. Advanced analysis characterization of battery materials is not only important understand fundamental properties but also crucial their continued development. A deep understanding these systems often difficult obtain through pre- and/or post-mortem analyses, with full complexity a being hidden in its operational state. Thus, we have developed an operando methodology analyze...
In this study, we present a comprehensive analysis of lithium dendrite formation in half-cells with garnet-type solid-state electrolyte Li7La3Zr2O12 (LLZO) utilizing operando neutron imaging and subsequent ex-situ correlative structural chemical analysis. The experiment involves cycling symmetric half-cell (Li|LLZO|Li) until short-circuit failure, all while being irradiated neutrons, providing invaluable insights into the dynamic processes within half-cell. Post-mortem investigations were...
On‐line atmospheric pressure plasma treatment of cylindrical substrates is great interest in tire industry view developing a cheaper and cleaner process than electrolytic plating ones that are applied on metallic reinforcing materials. Here we assess the feasibility such continuous by depositing organo‐chlorinated thin films from dichloromethane zinc‐plated steel wires crossing tubular dielectric barrier discharge. We show working conditions highly influence layers growth have to be...
This paper describes the manufacture of porous polytetrafluoroethylene (PTFE) and fluoroethylenepropylene (FEP) films by pressing PTFE-FEP-PTFE between metallic meshes to produce a ferroelectret material. The influence uniaxial force processing conditions (temperature presence vacuum polymer films) on as-formed film are assessed in terms pore (void) height, distribution height quality. piezoelectric d33 coefficient (charge per unit force) polarised is measured related
Abstract An atmospheric pressure plasma chemical vapor deposition process designed for the site‐selective of organic functional materials with a sub‐millimetric lateral resolution is presented in this study. Injecting methyl methacrylate post‐discharge allowed to synthesize plasma‐polymerized (ppMMA) coatings on metallic, dielectric, and polymer substrates at close room temperature (40°C). A circular dot, as small 400 µm diameter, ppMMA deposited characterized by Fourier‐transform infrared...
High operational frequencies of the upcoming 5G network will result in shorter broadcast distances and dead zones. Additional access points signal repeaters embedded into existing infrastructure therefore be needed. We demonstrate an autonomous communication module based on additively manufactured transparent antenna set to operate at 2.4 GHz. The is made inkjet-printed indium tin oxide, with visible light transmittance, electrical conductivity, Haake's figure merit 87%, 1,280 S cm−1, 4.9 ×...
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The electrochemical control of molecular concentrations in liquids is quite challenging because the small ratio interacting sites between electrode surface and number molecules volume. Here we review our recent works aiming proton concentration combining redox self-assembled monolayers with a modified platform. We used Aminothiolphenol, to obtain coatings quasi-reversible states able exchange protons electrolyte at low voltages using different polymerization methods. studied their charge...
Journal Article Operando Elemental Imaging Using SIMS: Correlative Structural, Chemical, and Electrochemical Analysis of Solid-state Batteries Get access Luca Cressa, Cressa Advanced Instrumentation for Nano-Analytics (AINA), Luxembourg Institute Science Technology, Belvaux, LuxembourgChair Materials Physics, Science, University Stuttgart, Germany Corresponding author: luca.cressa@list.lu Search other works by this author on: Oxford Academic Google Scholar Yanyan Sun, Sun German Aerospace...