Aline Castilho Rodrigues
National Institute for Space Research
ParticleComposite numberReflectivityAnalytical chemistryPseudocapacitanceElectrochemical cellElectromagnetic radiationAdsorptionReactivity (chemistry)CarbonizationComposite materialNanotechnologyElectrodeX-ray photoelectron spectroscopyAttenuationMaterials scienceCurrent densityScience, technology and societyParticulatesScanning electron microscopePolyacrylonitrileChemical substanceCarbonyl ironReflection lossPolypyrroleCyclic voltammetryThermal oxidationKu bandActivated carbonGraphiteGraphite intercalation compoundRange (particle radiation)Aqueous electrolyteCapacitanceGrapheneRaman spectroscopyChemical engineeringMicrowaveCarbonHydrogenCarbon nanotubeFiberElectrochemistryChemical vapor depositionAbsorption (electromagnetic radiation)SupercapacitorElectrolyteDielectric spectroscopyEnergy storageElectrical resistance and conductance
12Publications
4H-index
74Citations
Publications 11
Newest
Carbon material is the largest material used as electrode on advanced energy storage devices. The modern lifestyle requires more energy, consequently, more smart energy use and efficient devices are needed. The constant evolution of materials technologies looking for green material and renewable raw material, that have minimal impact on the environment, is one of the most important subjects studied in recent years. The scientific and industry community are paying more attention to new forms of c...
Last. Maurício Ribeiro Baldan (INPE: National Institute for Space Research)H-Index: 25
view all 6 authors...
The different graphite morphologies, like graphite intercalation compound (GIC), expanded graphite (EG), and exfoliated graphite (ExfG), were investigated as microwave absorbing materials (MAMs). The modification of the GIC was carried out in two independent parts, consisting of heat treatment and subsequent ultrasound agitation, forming the EG and ExfG, respectively. The surface morphology and structural characterization were investigated using the scanning electron microscope and Raman spectro...
1 CitationsSource
Supercapacitors have been studied due to their promising as powerful storage devices. The development of highly efficient electrodes is one way to manufacture supercapacitors with high energy and power efficiencies. Binary composites based on activated carbon fiber felt (ACFF) and polypyrrole (PPy) have been investigated to increase capacitance performance. ACF, when applied as a bulk electrode has limited electric characteristics while the PPy suffers from limited stability during cycling that ...
2 CitationsSource
There are three basic steps to activated carbon fibers (ACF) manufacturing, from PAN fiber: oxidation/stabilization, carbonization and activation. Carbon material, specially ACF is a very attractive material to be used as supercapacitor electrode. The literature describes carbon material surface chemistry importance for supercapacitors application, mainly nitrogen groups by N-doping. Oxidation/stabilization is an important non-explored factor that influence the surface chemical functionality. Th...
3 CitationsSource
Abstract Supercapacitors have received great attention in science and technology, due to its important qualities as the high cycle life, high power density, and variety of applications. The main challenge for the development of better devices is the electrode material. Developing electrode materials with high specific electrical capacitance and low electrical resistance enables an increase of energy accumulated in the supercapacitor. In addition, it is expected that the electrode material presen...
12 CitationsSource
#2Aline Castilho Rodrigues (INPE: National Institute for Space Research)H-Index: 4
Last. Maurício Ribeiro Baldan (INPE: National Institute for Space Research)H-Index: 25
view all 4 authors...
Esse trabalho apresenta as etapas de preparacao do cabelo caucasiano, uma alternativa de materia prima de baixo custo, para posterior carbonizacao e sua transformacao como material carbonoso. Algumas das etapas consistem na conversao do cabelo em feltro e a posterior oxidacao que tem o objetivo de eliminar o cortex, permitindo obter fibras ocas e posterior material carbonoso. Tais condicoes indicam que o cabelo caucasiano possa tornar-se uma fibra de carbono de alta e rapida capacidade de adsorc...
Source
This paper presents the influence of different sizes of carbonyl iron particles on the reflectivity measurements of Radar Absorbing Material (RAM). The electromagnetic characterization was performed with a vector network analyzer and a rectangular waveguide in the frequency range of 12.4 to 18GHz (Ku Band). The influence of different parameters such as thicknesses, particle sizes and concentration of carbonyl iron were evaluated. Reflectivity results showed the influence of these parameters on t...
3 CitationsSource
Last. Maurício Ribeiro BaldanH-Index: 2
view all 4 authors...
Esse trabalho apresenta as etapas de preparacao do cabelo caucasiano, uma alternativa de materia prima de baixo custo, para posterior carbonizacao e sua transformacao como material carbonoso. Algumas das etapas consistem na conversao do cabelo em feltro e a posterior oxidacao que tem o objetivo de eliminar o cortex, permitindo obter fibras ocas e posterior material carbonoso. Tais condicoes indicam que o cabelo caucasiano possa tornar-se uma fibra de carbono de alta e rapida capacidade de adsorc...
Source
#1Aline Castilho Rodrigues (Aeronáutica)H-Index: 4
#2Elen Leal da Silva (INPE: National Institute for Space Research)H-Index: 1
Last. Maurício Ribeiro Baldan (Aeronáutica)H-Index: 2
view all 8 authors...
9 CitationsSource
#1Amanda Araujo Silva (INPE: National Institute for Space Research)H-Index: 4
#2Romário Araújo Pinheiro (INPE: National Institute for Space Research)H-Index: 6
Last. Evaldo José Corat (INPE: National Institute for Space Research)H-Index: 34
view all 6 authors...
Abstract Carbon nanotubes (CNTs) are well known by their unique properties, such as high electrical conductivity and chemical stability, which can improve charge transfer, facilitating double layer charging in supercapacitor devices. In this work we report on a simple method to unzip CNTs, producing graphene sheets. The amount of hydrogen atoms in the nanotubes synthesis by micro-wave chemical vapor deposition is a critical parameter for unzipping process. High crystalline quality graphene sheet...
22 CitationsSource