The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
Conductive porous carbons generally are used as the additives to contact with active materials to generate conductive network for electrodes of commercial lithium ion batteries (LIBs). As a cathode material, LiFePO4 (LFP) has been widely used for LIBs. However, it needs higher quantity of conductive carbons to enhance its electrochemical performances due to the low ion diffusion coefficient and low...
S/TiO2 composite is prepared via a simple solution method by using sublimed sulfur and nanosized TiO2. The composite is characterized by transmission electron microscopy (TEM), scanning electron microscopy (SEM), X-ray diffraction (XRD), and Brunauer–Emmett–Teller (BET) test. The results indicate that the sulfur is well dispersed in the composite. The electrochemical performance of the composite as...
Blended spherical cathodes of lithium iron phosphate with different particle sizes were prepared using a physical mixing method. The processability and electrochemical properties of blended spherical cathodes were systematically investigated. The characterization results suggest that the blended spherical cathodes contain two different-sized particles, and smaller particles can fill in the gaps created...
Characterizing lithium-ion batteries is of prime importance as it helps in understanding the safety, working temperature, voltage range, and power capabilities. Based on these results, we can then choose operating conditions which include safety protocols, application, and working environment. In this study, EIS studies of commercially available 20-Ah lithium-ion battery and a 28-Ah prototype cell...
Mn-based carbonate precursor (Ni0.15Co0.15Mn0.7CO3) is synthesized by the carbonate precipitation in the presence of ethylene glycol. The nucleation and growth of precursor particles are investigated during the precipitation process by monitoring particle morphologies and structures. Primarily irregular-shaped and micron-sized loose agglomerate particles are formed and then the particles grow gradually...
In this work, we report a facile chemical precipitation method to prepare zinc manganite (ZnMn2O4) materials. ZnMn2O4 nanosheets were synthesized through a cathodic electrolytic electrodeposition (ELD), and their application as supercapacitor electrodes were evaluated. The effect of calcining temperature on the nanostructure and morphology of ZnMn2O4 was investigated systematically through scanning...
In this paper, a highly-active cobalt oxide (CoO) nanospheres catalyst has been synthesized by DC arc discharge plasma method and used as air electrode for lithium oxygen battery. Through scanning electron microscopy (SEM) observation, the particle size of the cobalt oxide (CoO) catalyst can be controlled between 40~60 nm and dispersed uniformly into the active material. And then the cobalt oxide...
A novel CeO2-modified Li5Cr7Ti6O25 composite as Ti-based anode has been developed to enhance the reversible capacity of the lithium-ion battery. The results show that an amorphous CeO2 film with thickness of around 2–3 nm is wrapped on the surface of Li5Cr7Ti6O25 particles, and CeO2 modification broadens the lithium ion migration channel. CeO2-coated Li5Cr7Ti6O25 shows wonderful reversible delithiation...
An attempt has been made to synthesize a polymer electrolyte based on biopolymer pectin with ammonium thiocyanate (NH4SCN) salt by solution casting technique. Amorphous/crystalline nature of the polymer electrolyte has been studied by X-ray diffraction technique. The complexation between polymer and salt has been confirmed by Fourier transform infrared spectroscopy. A shift in glass transition temperature...
Lithium-air/oxygen battery has raised widespread interest due to its extraordinary theoretical energy density (up to 3500 Wh kg−1). In this study, a flexible free-standing NASICON (Na-super ionic conductor)-type hybrid solid-state polymer electrolyte (HSPE) based on PVDF-HFP (poly(vinylidene fluoride-hexafluoropropylene)) copolymer and NASICON LATP (Li1.3Al0.3Ti1.7(PO4)3) was prepared and investigated...
Metallic as well as semiconducting nanostructures have generated wide interest and are achieving growing importance because of their potential applications in various devices, such as batteries, manufacturing of electrical contacts in microelectronics, MEMS, and solar cells. In the present work, template synthesis method coupled with electrodeposition has been used to synthesize copper nanowires of...
Micronanosized LiNi0.5Mn1.5O4 nanorods coated with reduced graphene oxide is successfully synthesized by a hydrothermal-assembly method. The as-prepared samples are characterized by X-ray diffraction, Raman spectroscopy, field emission scanning electron microscope, and electrochemical tests. The XRD and Raman results show that the LiNi0.5Mn1.5O4 nanorods have disordered structure of Fd-3m space group...
The synthesis of highly stable metallic organic–inorganic hybrid nanocomposites from the non-toxic and biodegradable organic–inorganic metallic precursors, which are the natural polymer products of organic molecules, carbohydrates, and amino acids, has engrossed the recent researchers. In this work, a simple potentiostatic approach has been designed for the electrochemical preparation of gold nanoparticle-decorated...
One-dimension mesoporous cobalt ferrite (CoFe2O4) nanofibers were prepared by a facile single-nozzle electrospinning technique followed by calcination. The lithium storage properties show that the CoFe2O4 nanofibers obtained at 800 °C deliver an initial discharge capacity of 1888 mAh g−1 and a reversible capacity as high as 942 mAh g−1 after 80 cycles, much higher than those of the samples obtained...
In this report, a nitrite electrochemical sensor was developed by electrochemical deposition of copper nanoparticles on the polypyrrole nanotubes (PPy-Cu). The PPy nanotubes were synthesized via pyrrole polymerization on electrospun polystyrene nanofibers (PS) with the diameter of 150 nm, followed by PS removal. The prepared nanotubes were characterized using Fourier transform infrared spectroscopy...
Nickel is doped successfully at the B-site of La0.3Y0.1Sr0.4TiO3−δ (LYSTA−) perovskite to yield La0.3Y0.1Sr0.4Ni0.04Ti0.96O3−δ (LYSNTA−) for its use as an anode for solid oxide fuel cell (SOFC). Ex-soluted nickel particles from LYSNTA− formed upon reduction in hydrogen show average particle size of 6 nm. Electrochemical studies are performed on bilayers of LYSTA−/YSZ and LYSNTA−/YSZ using electrochemical...
After twice heat-treating and ball-milling, the dimension of CNTs is shorter and the ends are open. By using the treated CNTs, graphene, and Ni(NO3)2, Ni(OH)2/CNTs/graphene ternary composites were synthesized through galvanostatic electrodeposition under supergravity field. The ternary composite presents a 3D hierarchical structure, in which graphene as the substrate primarily plays a role of external...
ZrP2O7-CeP2O7 solid solutions, Zr1-xCexP2O7; x = 0–0.2 and (Zr0.92Y0.08)1-yCeyP2O7; y = 0–0.1, were prepared by partially replacing Zr4+ with Ce4+ and its effect on the phase composition, sintering behavior, microstructure, and ionic conductivity is analyzed. Ce4+-doped specimens showed improved sintering behavior due to the partial reduction of Ce4+ to Ce3+, as confirmed by X-ray photoelectron spectroscopy...
This research work focused on the synthesis of visible light-active ZnO photocatalyst through modification with nitrogen and graphene oxide, followed by its application towards the degradation of brilliant smart green (BG) dye. The characterization of the synthesized photocatalysts was done using optical approaches such as X-ray diffraction (XRD), Fourier transform infrared (FTIR), transmission electron...
Biodegradable solid polymer electrolytes based on PVA (polyvinyl alcohol) and amino acid (proline) with different molar mass percentages of ammonium chloride (NH4Cl) were prepared by solution-casting technique using distilled water as solvent. Their structural, thermal, vibrational, and electrical properties were studied. XRD analysis confirms the amorphous nature of the polymer electrolytes. DSC...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.