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Utilizing renewable and abundant biomass waste to prepare hierarchically porous carbons (HPC) materials with large surface area and good electrical conductivity have received considerable attention recently. In this work, a novel 3D HPC was prepared by a low-cost and facile hydrothermal process, carbonization, and chemical activation from Huiyuan® fruit grain orange (FGO) with expired deadline for...
Using an electrospinning method, high-performance gel polymer electrolytes (GPEs) comprising polyacrylonitrile/thermoplastic polyurethane/polystyrene (PAN/TPU/PS) were prepared. Then, these electrolytes were used to assemble button cells. The GPEs exhibited a maximum ionic conductivity of 3.9 × 10−3 S cm−1 at room temperature, with an electrochemical stability of 5.8 V. In addition, a Li/GPE/LiFePO...
Na2 + 2xFe2-x (SO4)3 (NFS) holds great promise as the cathode material for room-temperature sodium-ion batteries. However, large-scale application of NFS is highly impeded by its low electrical conductivity, which leads to poor cyclability and rate capability. To address these issues, we introduce rice husk-derived carbon with engineered porosity and structure as carrier to load active material NFS...
In this article, the cathode passivation in the MgCl2 electrolysis caused by iron ions was characterized first time by scanning electron microscopy (SEM), in which the magnesium with the shape of caviar could be seen intuitively. The cathodic processes of Fe (III) on tungsten electrode in MgCl2-NaCl-KCl-CaCl2 melts were investigated with different methods including square wave voltammetry (SWV), cyclic...
Polymer films composed of thermoplastic polyurethane (TPU), poly (methyl methacrylate) (PMMA), and titania were developed by solution-casting method. Accordingly, gel polymer electrolytes (GPEs) were prepared by soaking the films in commercial liquid electrolytes for 8 h. The prepared GPEs could fix the liquid electrolytes inside and kept the shape stable. The hybrid GPEs exhibited a maximum ionic...
The kinetics and mechanism of oxygen reduction reaction (ORR) in alkaline medium are studied on lanthanum nickelate materials La2−x−yNdxPryNiO4±δ (x = 0, 0.3 and 0.5; y = 0 and 0.2) using the electrochemical technique of the rotating disk electrode in a 0.5-M solution of NaOH. The oxide powders are synthesized by the citrate–nitrate method. Structural and surface characterizations are performed by...
A cobalt sulfide encapsulated within carbon nanotube-carbon nanofiber (Co9S8@CNT-CNF) nanohybrid electrode is designed and prepared. The physicochemical characterization such as X-ray diffraction (XRD) and electron microscopy revealed the formation of Co9S8@CNT-CNF. The specific capacitance of Co9S8@CNT-CNF is 1656 F g−1 at 1 A g−1 with good electrochemical cycle stability (92.6% up to 10,000 cycles)...
The depletion of conventional fossil fuel is one of the most serious problems nowadays. To develop new materials for efficient energy transformation or storage are great challenges for the researchers. Due to the unique two-dimensional structure, high surface area, excellent electrical conductivity, and easy modification, graphene (GR) has attracted great attention in the energy-related fields. It...
The lithium rubidium molybdate compound LiRbMoO4 was prepared by the solid-state reaction method. XRD spectra revealed a single phase material with an orthorhombic structure. The internal Raman modes were observed at room temperature. The dielectric measurement exhibited three subsequent phase transitions: two structural transitions at the neighborhood of 397 K and 420 K followed by a ferro-paraelectric...
In this paper, we report the effect of a small quantity of acetonitrile (ACN) addition to an ionic liquid-based electrolyte for lithium-ion (Li-ion) batteries, which is comprised of lithium bis(trifluoromethylsulfonyl)imide (LiTFSI) salt dissolved in 1-butyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide (BMIMTFSI). The addition of a small amount of ACN results in the increase of ionic conductivity,...
In this work, two asymmetric NiO-BaZr0.1Ce0.7Y0.2O3-δ (NiO-BZCY) anode substrates were prepared via the phase-inversion tape casting method for Ce0.8Sm0.2O2-δ (SDC)-based solid oxide fuel cells. The results showed that the anode support structure significantly influenced the electrochemical properties of the cells. The cell supported on the anode substrate consisted of a finger-like layer and a sponge-like...
In this paper, NiO, Ni7S6, and different proportions of Ni7S6/NiO hybrids were synthesized by solvothermal method. The crystal structure, valence, and morphology of the prepared samples were characterized by X-ray diffraction, X-ray photoelectron spectroscopy, and scanning electron microscopy. Electrochemical performance of the prepared materials was tested by a series of electrochemical methods....
The question of the number of carbonate molecules in the first coordination shell of the lithium cation is outstanding. This query has been already answered for cyclic carbonates like ethylene carbonate (EC), demonstrating a coordination number of 4. In this work, we attempt to solve such a problem for three linear carbonates including dimethyl carbonate (DMC), ethyl methyl carbonate (EMC), and diethyl...
The magnetic and electrical features of rare-earth orthoferrites, RFeO3, can be modified via substitution of different elements into R and/or Fe sites. In the present investigation, the electrical properties of YbFeO3 (YbFO) were inspected with cobalt (Co) doping into Fe sites by various mole %. The crystalline morphology of the obtained YbFeO3 and YbFe1-xCoxO3 (YbFCO) (x = 0.01, 0.05, 0.10) powders...
Magnetic nickel ferrite (NiFe2O4) nanoparticles were synthesized and then modified by a novel hydrogel based on 2-acrylamido-2-methyl propane sulfonic acid (HAMPS). Field emission scanning electron microscopy (FE-SEM), X-ray diffraction (XRD), and Fourier-transform infrared spectroscopy (FTIR) analyses were conducted to prove the NiFe2O4/HAMPS nanocomposite formation decisively. The effect of NiFe...
The platinum nanoparticles were grown directly by electrodeposition process on electrochemically oxidized carbon paper (CP) and non-oxidized CP as the anode gas diffusion electrodes (GDEs) for the application in ABPBI-based high-temperature polymer electrolyte membrane fuel cell (HT-PEMFC). XRD, SEM, and CO stripping in the range of 40 to 120 °C were used to investigate the prepared GDEs. Results...
Solid oxide fuel cells based on yttria-stabilized zirconia materials have demonstrated a higher level of technology maturity compared to newer materials actively researched to lower the operating temperature. Yttria-stabilized zirconia-based cells can operate around 600 °C and achieve competitive power densities provided the electrolyte can be fabricated relatively thin. In this work, a 2.5-μm thick...
In this study, Co3O4 with different morphologies (nanowires of single phase, nanowires, and rectangular flakes of both phases) for supercapacitor electrode were synthesized through a hydrothermal approach in the presence of Triton X-100 followed by annealing at 350 °C for 1 h. The different morphologies of the samples were obtained with the assistance of surfactant by adjusting the quantity of reactants...
A novel hydrophobic electrospun gel polymer electrolyte [100-x% P (VdF-co-HFP) + x% P(TFE), (x = 5, 10, 15, 20, 25, and 30)/1M Li(CF3SO2)2N−] fibrous membranes with an addition of various concentrations of P(TFE) particles were prepared by an electrospinning technique. All the newly prepared electrospun pure and various concentrations of P(TFE) particles dispersed polymer fibrous membranes were characterized...
The oxygen reduction reaction (ORR) was studied using Nd1.9Sr0.1Ni0.9Co0.1O4 ± δ (NSNCO01) nickelates as cathode material at room temperature in aqueous phase. The citrate method was used for preparing the material. The electrochemical study of ORR was carried out in a 0.5-M NaOH solution at 25 °C with a rotating disk electrode. XRD and SEM analysis were performed to characterize the crystallinity...
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