Improve electrochemical properties

Part 3 book "Albright's chemical engineering handbook" includes content: Conceptual process design, process improvement, and troubleshooting; chemical process safety; environmental engineering - A review of issues, regulations, and resources; biochemical engineering; measuring physical properties; selecting materials of construction; solid liquid separation; drying - principles and practice; dry screening of granular and powder materials; conveying of bulk solids; principles and applications of electrochemical engineering;... and other contents.

647p muasambanhan09 16-03-2024 5 1   Download

Polycarbazole/chitosan composite materials were synthesized electrochemically at various loadings of chitosan (Chi). Their electrochemical, structural, thermal, and morphological characterizations were investigated by cyclic voltammetry, chronoamperometry, electrochemical impedance spectroscopy, Fourier transform infrared spectroscopy, thermal gravimetry, and scanning electron microscopy. Further electrical conductivity was measured using a four-point probe technique.

10p langthannam 29-12-2021 5 0   Download

This study reports the effect of vanadium on the crystal structure and electrical and electrochemical properties of La0.6−x VxSr0.4MnO3−δ (x = 0.005–0.1) perovskite-based cathode materials in solid oxide fuel cells. Crystal structure, morphology, and porosity of prepared cathode materials are characterized by X-ray diffraction, X-ray photoelectron spectroscopy (XPS), and scanning electron microscopy. Using XPS analysis it was established that the La3+ cation is exchanged by the V4+/5+ cation in the perovskite structure.

31p tudichquannguyet 29-11-2021 11 2   Download

In the past years there has been a great interest in self-doped TiO2 nanotubes (blue TiO2 nanotubes) compared to undoped ones owing to their high carrier density and conductivity. In this study, blue TiO2 nanotubes are investigated as photoanode materials for photoelectrochemical water splitting. Blue TiO2 nanotubes were fabricated with enhanced photoresponse behavior through electrochemical cathodic polarization on undoped and annealed TiO2 nanotubes.

13p tudichquannguyet 29-11-2021 10 0   Download

Nanocomposite material LiFe1-xMxPO4/Gr was successfully synthesized achieving it with single phase. It’s response required electrochemical parameters of positive electrode materials for Li-ion batteries such as: improved diffusion coefficient and conductivity, higher capacity comparative with LFP in same conditional synthesis.

28p capheviahe26 25-01-2021 18 3   Download

An experiment was executed with ten crop sequences during 2010-17 at C.S. Azad University of Agriculture and Technology, Kanpur, Uttar Pradesh under All India Coordinating Research Project on Cropping systems. All these sequences were evaluated for their soil electrochemical and nutrient analysis. Results revealed that improvement in soil electrochemical properties (pH, EC and OC) and available NPK content after harvest was achieved by Hyb.

6p angicungduoc5 14-06-2020 5 1   Download

Curcumin modified graphene oxide (GO-CR) was prepared using the adsorption method and polyurethane (PU) coating containing 0.3 wt% GO-CR was prepared on carbon steel. Synthesized GO-CR was characterized by Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), scanning electron microscopy (SEM) and zeta potential measurement. Corrosion protection property of polyurethane coating containing GO-CR was evaluated and compared with that of blank polyurethane coating and coating containing GO by electrochemical impedance spectroscopy.

8p angicungduoc5 13-06-2020 13 1   Download

Ce (III) salt-activated CeO2 nanoparticles were incorporated into waterborne epoxy coating to improve the UV stabilisation of epoxied system. The surface morphology of the coatings was examined by using color spectrophotometer during the UV exposure test. The degradation of the epoxy coatings was observed by the change of barrier property determined by electrochemical impedance spectroscopy. The effect of activated nanoparticles on the impact resistance and adherence properties was also evaluated by impact strength test and cross-cut test.

10p angicungduoc5 13-06-2020 12 0   Download

In this work, LaNi3.55Al0.3Mn0.4Co0.75 compounds were prepared by arc melting method in the Ar atmosphere. The structure and grain size were tested by X-ray diffraction and TEM measurements. Electrochemical properties and battery parameter were carried out by bipotentiostat and battery tester equipments. The results show that with the grain size 50µm, capacity of the negative electrode was 77 mAh/g. When grain size of LaNi3.55Al0.3Mn0.4Co0.75 powder use for negative electrode reduces to 40nm, the capacity rapidly increase to 170 mAh/g and other battery parameter also improve.

6p 12120609 01-06-2020 15 2   Download

Epoxy resin DER 671X75 was reinforced by nanoclay cloisite 30B with content of 2% and primer coatings based on epoxy resin DER 671X75 were formed with pigments, fillers. Epoxy coating films were exposed by electrochemical method in NaCl 3.5 % solution in 28 days and salt spray accelerated tester in 330 hrs. The results show that nanoclay cloisite 30B are improved anticorrosion properties of primer coatings based on epoxy resin DER671X75.

5p giesumanh 04-11-2018 21 0   Download

Electrochemical tests indicate that the material prepared by the co-precipitation method has slightly better electrochemical properties, with an initial discharge capacity of 185 mAhg−1 and capacity retention of 96.85 % after 50 cycles at a cycling rate of 1.0 C, as well as better capability at 7 C. The improved performances of the co-precipitation synthesized material may be attributed to the low Li/Ni disorder.

6p lamtan3547 04-11-2018 11 0   Download

This study is focused on the synthesis of a polyindole doped by indole-3 butyric acid (PI-IBA). IR analyze indicated that the linkage positions of indole involves the position 2 and 3 of the monomer and the insertion of IBA in the polymer backbone. Polyindole IBA doped was incorporated into epoxy resin for protection anticorrosion of carbon steel. The electrochemical impedance measurements show a significantly improvement of protective properties in presence of PI-IBA in comparison with pure epoxy and epoxy containing polyindole coating.

6p uocvong01 24-09-2015 45 3   Download