A5015551955- Advanced Sensor and Energy Harvesting Materials
- Advancements in Battery Materials
- Advanced Battery Materials and Technologies
- Conducting polymers and applications
- Advanced Battery Technologies Research
- Dielectric materials and actuators
- Supercapacitor Materials and Fabrication
- Innovative Energy Harvesting Technologies
- Advanced Thermoelectric Materials and Devices
- Additive Manufacturing and 3D Printing Technologies
- Gas Sensing Nanomaterials and Sensors
- Extraction and Separation Processes
- Tactile and Sensory Interactions
University of Minho
2020-2024
In the realm of polymer composites, there is growing interest in use mora than one filler for achieving multifunctional properties. this work, a composite separator membrane has been developed lithium-ion battery application, by incorporating conductive silver nanowires (AgNWs) and titanium dioxide (TiO2) nanoparticles into poly(vinylidene fluoride-co-hexafluoropropylene) (PVDF-HFP) matrix. The membranes were manufactured solvent casting thermally induced phase separation, with total content...
Solid-state batteries were produced using new solid polymer electrolytes (SPEs) based on the high dielectric constant poly(vinylidene fluoride-trifluoroethylene-chlorofluoroethylene), P(VDF-TrFE-CFE) and 40 wt% of different ionic liquids (IL) sharing same bis(trifluoromethylsulfonyl)imide [TFSI] anion cations. The morphological, thermal, mechanical electrochemical properties SPEs investigated, as a function interaction between IL matrix. addition increased amorphous phase with respect to...
A heart rate sensor device has been designed and developed based on a composite material poly(vinylidene fluoride – co trifluoroethylene), P(VDF-TrFE) as polymer matrix barium strontium titanate (BST) particles ceramic fillers. The films were prepared by solvent casting varying the content between up to 40 wt%, allowing tailor dielectric piezoelectric response. morphology, phase thermal properties are independent of filler content, whereas constant increases significantly with increasing...
Solid polymer electrolytes (SPEs) have been produced using an ionic liquid (IL) (1-Methyl-1-propylpyrrolidinium bis(trifluoromethylsulfonyl)imide – [PMPyrr][TFSI]) embedded in different fluorinated matrices, including poly(vinylidene-fluoride) PVDF, poly(vinylidene fluoride-co-hexafluoropropylene) P(VDF-HFP), fluoride-co-trifluoroethylene) P(VDF-TrFE) and fluoride-co-trifluoroethylene-chlorofluoroethylene) P(VDF-TrFE-CFE), order to evaluate the effect of chain polarity, degree crystallinity...
Abstract Considering the high levels of materials used in fields electronics and energy storage systems, it is increasingly necessary to take into consideration environmental impact. Thus, important develop devices based on environmentally friendlier and/or processes, such as additive manufacturing techniques. In this work, poly(vinylidene fluoride) (PVDF) fluoride‐co‐hexafluoropropylene) (PVDF‐HFP) are prepared by direct‐ink‐writing (DIW) varying solvent evaporation temperature fill density...
Novel battery separators based on poly(vinylidene fluoride-co-trifluoroethylene-chlorofluoroethylene)- P(VDF-TrFE-CFE)- were produced by different processing techniques (non-solvent and thermally induced phase separation, salt leaching electrospinning), in order to evaluate their effect separator morphology, degree of porosity pore size, electrochemical parameters cycling behavior. It has been demonstrated that the have a significant influence morphology mechanical properties membranes. The...
The growing demand for improved performance, miniaturization and more environmental friendlier devices lead to the search better materials processing techniques. Ionic liquid‐polymer hybrid allow development of advanced suitable sensors actuators compatible with additive manufacturing techniques, allowing reduced waste fabrication in a variety shapes. In this work, ionic liquids (ILs) blended poly(vinylidene fluoride) (PVDF) were prepared by doctor blade direct ink writing. selected ILs...
The critical issue of thermal runaway events in lithium-ion batteries (LIBs) is recognized as a primary cause battery-related accidents. Despite ongoing efforts to enhance LIB safety, challenges persist due varying chemical compositions, states charge, and conditions use across different batteries. To advance battery safety considering cost practicality, this research introduces novel cathode material with shutdown characteristics. Incorporating thermoplastic microspheres into the matrix...
The growing interest in printable batteries leads to the necessity of developing new and more efficient materials that meet required processability performance characteristics. In this work, a poly(vinylidene fluoride-trifluoroethylene-chlorofluoroethylene) (P(VDF-TrFE-CFE)) terpolymer has been used for first time as polymer binder lithium-ion battery cathodes their electrochemical characteristics have compared with prepared commonly fluoride), P(VDF), binder. rheological analysis shows inks...
Direct-ink writing (DIW) printing technology represents a suitable and efficient additive manufacturing technique for producing intricate designs structures directly on the application surface. This work has demonstrated potential of combining DIW screen to fabricate an all-printed 7 × capacitive touch sensor based high dielectric constant (high-k) poly(vinylidene fluoride-trifluoroethylene-chlorofluoroethylene)─P(VDF-TrFE-CFE). The printed device allows maximum detection signal-to-noise...
The necessity of energy conversion solutions has increased over the last years due to power small and flexible devices related Internet things (IoT) concept. One most promissory ways address this challenge relies on thermoelectric effects, such as anomalous Nernst effect. Here poly (vinylidene fluoride-trifluoroethylene-chlorofluoroethylene) - P(VDF-TrFE-CFE) terpolymer sheet with high dielectric constant were produced by doctor blade technique used substrate produce Co2FeAl/P(VDF-TrFE-CFE)...