A5069550702- Advancements in Battery Materials
- Corrosion Behavior and Inhibition
- Transition Metal Oxide Nanomaterials
- Advanced Battery Materials and Technologies
- Concrete Corrosion and Durability
- Polymer composites and self-healing
- Hydrogen embrittlement and corrosion behaviors in metals
- Advancements in Solid Oxide Fuel Cells
- Gas Sensing Nanomaterials and Sensors
- Electronic and Structural Properties of Oxides
- Analytical Chemistry and Sensors
- Non-Destructive Testing Techniques
- Catalysis and Oxidation Reactions
- Metal and Thin Film Mechanics
- Electrochemical Analysis and Applications
- Microencapsulation and Drying Processes
- Layered Double Hydroxides Synthesis and Applications
- Thermal Expansion and Ionic Conductivity
- Advanced materials and composites
- Advanced Battery Technologies Research
- Lignin and Wood Chemistry
- Freezing and Crystallization Processes
- Cultural Heritage Materials Analysis
- Powder Metallurgy Techniques and Materials
- Copper Interconnects and Reliability
Serviço Nacional de Aprendizagem Industrial
2013-2024
Centro Universitário Curitiba
2014-2016
Boticário Group Foundation
2016
Institutos Lactec
2004-2007
Universidade Federal de São Carlos
2001-2003
Center for Research and Interdisciplinarity
2003
Instituto de Tecnología Cerámica
2003
Garnet-type structured electrolytes are considered a key technology for the next generation of lithium-ion batteries such as all-solid-state batteries. Cubic solid oxides with composition Li5+xLa3(Nb2−xZrx)O12 (x between 0 and 1.5) were synthesized by solid-state reaction sintered spark plasma sintering. Powder characterization indicates formation solution high chemical homogeneity spherical particles. High relative densities (>96%) obtained sintering at 950 °C 10 min pressure application...
Present work shows results of Li+ ions insertion and extraction from vanadium pentoxide doped with 5 mol% molybdenum trioxide (V2O5:MoO3) thin films. The characterizations were performed by cyclic voltammetry (CV), potentiostatic intermittent titration technique (PITT), electrochemical impedance spectroscopy (EIS). obtained revealed diffusional behavior for anodic cathodic processes, it was found that diffusion coefficient (D) values CV, PITT, EIS varied 10−10 to 10−12 cm2 s−1. Finally, a...
The aim of this study was evaluate, two methods for the detection and identification sulphate reducing bacteria (SRB): ML medium PCR with specific primers SRB groups. were detected through selective only on carbon steel, which showed corrosion. Employing primer, SBR from all metallic components assayed, even those that did not present visible corrosion spots, such stainless steel copper alloys. Despite presence or absence at later stages effectively by using medium,, initial could be...
Benzotriazole (BTA) release from a layered double hydroxide based on Zn and Al (LDH-ZnAl/BTA) in saline solution was investigated using UV-Vis spectroscopy, corrosion protection studied by OCP EIS measurements carbon steel samples immersed 3.5 wt-% NaCl solution. The of this ion-exchanger material performance for longer periods evaluated substrate coated with commercial epoxy primer loaded LDH-BTA (5.0 wt-%). salt spray tests demonstrated that the additive enhanced due to inhibitive effect,...
The objective of the current research is to evaluate and compare corrosion protection efficiency microcapsules containing tung oil copaiba using stereoscopic images, electrochemical tests, open circuit potential (OCP), polarization curves (Tafel analysis). Carbon steel plates were painted with three different coating systems: (a) a system an automotive primer which served as control, (b) 3% oil, (c) oil. A crosscut was performed scalpel on surfaces promote release oils, after drying, cells...
Sodium carboxymethylcellulose (CMC-Na) microparticles, containing corrosion inhibitor benzotriazole (BTA), were prepared using different spray drying processing parameters, with the purpose of future application in protective coatings for delivery inhibitors. The effects such as inlet temperature and flow rate, are discussed herein. biopolymeric CMC-Na microparticles obtained characterized morphologically by SEM TEM, their release profile studied UV-Vis. results show that (microspheres)...
Thin solid films of CeO2-SnO2 (17 mol% Sn) and CeO2-SnO2:X (X = Li, C Si) were prepared by the sol-gel route, using an aqueous-based process. The addition Si to precursor solution leads with different electrochemical performances. deposited dip-coating technique on ITO coated glass (Donnelly Glass) at a speed 10 cm/min submitted final thermal treatment 450 °C during min in air. optical properties determined from cyclic voltammetry chronoamperometry measurements 0.1 M LiOH as supporting...
The study of corrosion process on metal surfaces has been widely conducted for several years, from classical nondestructive electrochemical techniques, such as Open Circuit Potential (OCP) and Electrochemical Impedance Spectroscopy (EIS). However, these techniques allow only the analysis global response system, whereas regions where localized occurs (pitting, crevice, passive film rupture, etc.) are left without identification.
The Ti6Al4V alloy has been applied in situations where mechanical strength, corrosion resistance and biocompatibility are the concern, as permanent biomedical implants. These material properties straightly correlated with microstructure morphology grain size crystallographic phases, which is very dependent of thermal history chemical composition. harmonic structure was primarily achieved by means Mechanical Ball Milling (MBM) Spark Plasma Sintering (SPS) using pre-alloyed powder from plasma...
For decades, lead-acid batteries have been supplying power to electrical systems through redox reactions involving Pb and PbO2. However, the energy supply capacity is inherently constrained by low density challenges associated with charge/discharge cycles. Studies indicated that additions of C composition active mass improve electrochemical properties batteries. This work aims produce, characterize microstructure evaluate Pb-Carbon composites, comparing different types (graphite, graphene...
On the basis of an ohmic model and a Tafel equation describing relations between current density overpotentials in film at metal/film interface, respectively, it is shown that quantitative analysis galvanostatic transients for growth passivating ultra-thin films on so-called non-noble metals can be obtained.As example, ZnO Zn boric/borate buffer solution considered.In this case, values transfer coefficient exchange reaction interface were found to 1.2 0.11 mA cm -2 , respectively.It was...
The measures to support innovation announced in March 2013 by President Dilma Rousseff represent a major advance for Brazil, the extent that consensus is Brazil needs innovate, develop new technologies and add value products processes services, so domestic industry can be more competitive, both nationally globally. At same time, with announcement of Innovates Company Plan (Plano Inova Empresa), Confederation National Industries - CNI signed technical cooperation agreement BNDES Bank Economic...
In this work, 8 mol% yttria-stabilized zirconia (8%YSZ) containing micro or nanoparticles were manufactured by Spark Plasma Sintering technique, in order to improve sample densification and control grain growth. The electrical conductivity of dense 8%YSZ pellets sintered was investigated electrochemical impedance spectroscopy (EIS). Preliminary results showed for samples produced from both nanoparticle at 1000 °C 5 min, the relative density is approximately 98 %, while others 1200 above 99...
Layered double hydroxides (LDH) are lamellar structures with positively charged laminates and charge-compensating interlayer anions. The ion-exchange capacity of LDHs makes them as promising hosts for corrosion inhibitor anions stimulus-responsive release self-healing anticorrosion. In the current work, loaded two different inhibitors (nitrogen oxides benzotriazole) were evaluated their autonomic protection against on carbon steel. Studies nitrogen oxide-loaded LDH (NOx-LDH) showed that...
As a contribution to the First International Seminar on Industrial Innovation in Electrochemistry - S3iE held Curitiba-Pr, Brazil 16-17 September 2013 collaborative work between an institute for applied research and supplier of paints industrial applications, is presented. In this kinetics cure paint film based epoxy high solid with VOC-volatile organic compounds was studied by Multi-Speckle Diffusion Wave Spectroscopy technique. The resistivity determined electrochemical impedance...