79 documents found, page 1 of 8
Influence of active material content on the performance of direct ink printed l...
Pinto, Rafael S.; Hilliou, L.; Petrenko, Viktor; Costa, Carlos Miguel Silva; Lanceros-Mendez, S.; Gonçalves, Renato FerreiraDriven by the growing demand for small devices due to the Internet-of-Things concept, lithium-ion batteries (LIBs) represent an essential technology to store energy for portable electronics with specific sizes/requirements. The LIBs' performance is highly dependent on the electrodes' composition/microstructure, particularly the cathode. In this work, it is investigated the influence of different ratios between ...
Tailoring poly(vinylidene fluoride-trifluoroethylene-chlorofluoroethylene) memb...
Pinto, Rafael S.; Serra, João Pedro Cruz; Barbosa, João Carlos Pacheco; Silva, Maria Manuela; Salado, Manuel; Fidalgo Marijuan, Arkaitz; Amayuelas, EderNovel 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 and electrospinning), in order to evaluate their effect on separator morphology, degree of porosity and pore size, electrochemical parameters and battery cycling behavior. It has...
Wool/soy protein isolate membranes as separators toward more sustainable lithiu...
Serra, J. P.; Barbosa, J. C.; Silva, Maria Manuela; Gonçalves, Renato Ferreira; Uranga, J.; Costa, Carlos Miguel Silva; Guerrero, P.; de la Caba, K.Natural origin products exist in large quantities around the world and many times they are not properly exploited in order to realize their potential in novel applications, being often even discarded as by-products from other uses. In this study, wool and soy protein isolate (SPI) are proposed to develop separator membranes for lithium-ion batteries (LIBs), aiming toward a new generation of sustainable batterie...
Lithium-ion battery high performance cathode electrode based on LiFePO4 and the...
Monteiro, Inês F.; Pinto, Rafael S.; Silva, Maria M.; Fidalgo-Marijuan, Arkaitz; Costa, Carlos Miguel Silva; Lanceros-Mendez, S.The critical issue of thermal runaway events in lithium-ion batteries (LIBs) is recognized as a primary cause of battery-related accidents. Despite ongoing efforts to enhance LIB safety, challenges persist due to varying chemical compositions, states of charge, and conditions of use across different batteries. To advance battery safety and considering cost and practicality, this research introduces a novel cath...
Heart rate monitoring system based on piezoelectric poly(vinylidene fluoride-co...
Diez, Ander G.; Pereira, Nelson; Pinto, Rafael S.; Gonçalves, Renato Ferreira; Costa, Carlos Miguel Silva; Lanceros-Mendez, S.A heart rate sensor device has been designed and developed based on a composite material based on poly(vinylidene fluoride – co – trifluoroethylene), P(VDF-TrFE) as polymer matrix and barium strontium titanate (BST) particles as ceramic fillers. The composite films were prepared by solvent casting varying the ceramic particles content between up to 40 wt%, allowing to tailor the dielectric and piezoelectric res...
Influence of ionic liquid characteristics on the performance of ternary solid p...
Barbosa, João Carlos; Correia, Daniela Maria Silva; Nunes, Paulo; Fernandes, Mariana; Fidalgo-Marijuan, Arkaitz; Gonçalves, Renato FerreiraSolid polymer electrolytes (SPEs) are the necessary step towards solid-state lithium-ion batteries (LIBs). Their function as separator and electrolyte allows to increase the safety of energy storage devices by the elimination of the liquid components. In this work, three-component SPEs based on poly(vinylidene fluoride-co-hexafluoropropylene) (PVDF-HFP) as host polymer, clinoptilolite zeolite, and different ion...
Ionic liquids in the scope of lithium-ion batteries: from current separator mem...
Barbosa, J. C.; Correia, Daniela Maria Silva; Gonçalves, Renato Ferreira; de Zea Bermudez, V.; Lanceros-Méndez, S.; Costa, Carlos Miguel SilvaA relevant issue associated with the environmental impact of current and future technologies is the balance between performance and sustainability. In this regard, there is an effort to increase the sustainability of energy storage systems and, in particular, of lithium-ion batteries, by replacing the most harmful battery components with environmentally friendlier ones. The application of ionic liquids, both as...
Solid polymer electrolytes based on a high dielectric polymer and ionic liquids...
Barbosa, João C.; Pinto, Rafael S.; Correia, Daniela Maria Silva; Tubio, Carmen R.; Gonçalves, Renato Ferreira; Costa, Carlos Miguel SilvaSolid-state batteries were produced using new solid polymer electrolytes (SPEs) based on the high dielectric constant polymer poly(vinylidene fluoride-trifluoroethylene-chlorofluoroethylene), P(VDF-TrFE-CFE) and 40 wt% of different ionic liquids (IL) sharing the same bis(trifluoromethylsulfonyl)imide [TFSI] anion and different cations. The morphological, thermal, mechanical and electrochemical properties of the...
Influence of solvent evaporation temperature on the performance of ternary soli...
Barbosa, João C.; Correia, Daniela Maria Silva; Fidalgo-Marijuan, Arkaitz; Gonçalves, Renato Ferreira; Ferdov, Stanislav; de Zea Bermudez, VerónicaSolid polymer electrolytes (SPEs) will allow improving safety and durability in next-generation solid-state lithium-ion batteries (LIBs). Within the SPE class, ternary composites are a suitable approach as they provide high room-temperature ionic conductivity and excellent cycling and electrochemical stability. In this work, ternary SPEs based on poly(vinylidene fluoride-co-hexafluoropropylene) (PVDF-HFP) as a ...
Sustainable materials for lithium-ion batteries: electrodes, separators and sol...
Salado, Manuel; Gonçalves, Renato Ferreira; Costa, Carlos Miguel Silva; Lanceros-Mendez, S.Lithium-ion batteries (LIBs) represent the most suitable and widely used candidate for effective energy storage systems for a wide range of applications, such as small electronic devices and electric vehicles, among others. With the increase in energy demand and considering environmental issues and circular economy considerations, it is necessary that the materials that compose LIBs are most sustainable while m...