Showing papers in "Electrochimica Acta in 2010"

TL;DR: The solid electrolyte interphase (SEI) is a protecting layer formed on the negative electrode of Li-ion batteries as a result of electrolyte decomposition, mainly during the first cycle as discussed by the authors.

TL;DR: Two different mathematical formulas for estimating effective capacitance from CPE parameters, taken from the literature, are associated unambiguously with either surface or normal time-constant distributions as mentioned in this paper.

TL;DR: In this paper, high quality graphene sheets were prepared from graphite powder through oxidation followed by rapid thermal expansion in nitrogen atmosphere, and the morphology and structure of the prepared graphene sheets are characterized by scanning electron microscope (SEM) and high-resolution transmission electron microscopy (HRTEM).

TL;DR: Capacitive deionization (CDI) is an electrochemical water treatment process that holds the promise of not only being a commercially viable alternative for treating water but for saving energy as well as mentioned in this paper.

TL;DR: In this article, the chemical diffusion coefficients of Li3V2(PO4)3 between 3.0 and 4.8 V are systematically determined by cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS) and galvanostatic intermittent titration technique (GITT).

TL;DR: In this article, the authors study the oxygen reduction reaction (ORR) mechanism on a Pt(1 1/1/1) surface using density functional theory calculations and find that at low overpotentials the surface is covered with a half dissociated water layer.

TL;DR: In this paper, the homogeneous distribution of Co 3 O 4 nanoparticles (3-5-nm in size) on graphene sheets has been observed and the composite exhibits excellent long cycle life along with ∼95.6% specific capacitance retained after 2000 cycle tests.

TL;DR: Graphene, graphene-ZnO and graphene-SnO 2 films were successfully synthesized and used as electrode materials for electrochemical supercapacitors, respectively as discussed by the authors.

TL;DR: In this paper, the structure and morphology of the Fe 3 O 4 -graphene nanocomposite were characterized by X-ray diffraction, scanning electron microscopy and high-resolution transmission electron microscope, and the electrochemical performances were evaluated in coin-type cells.

TL;DR: In this paper, the electrochemical properties of Co 3 O 4 nanotubes were investigated by cyclic voltammetry, galvanostatic charge-discharge studies and electrochemical impedance spectroscopy in 6 −mol L −1 KOH solution.

TL;DR: In this paper, a carbon nanotube paste electrode modified in situ with Triton X 100 was developed for the individual and simultaneous determination of acetaminophen (ACOP), aspirin (ASA) and caffeine (CF).

TL;DR: In this article, the authors used TEM, EDS and Raman spectroscopy to characterize the morphology and composition of graphene oxide and graphene, and constructed a H 2 O 2 biosensor.

TL;DR: In this article, polyvinyl alcohol (PVA) was used as a hydrogen bond functionalizing agent to modify multi-walled carbon nanotubes (CNTs), and nanoparticles of Fe3O4 were formed along the sidewalls of the as-modified CNTs by the chemical coprecipitation of Fe2+ and Fe3+ in the presence of CNT in an alkaline solution.

TL;DR: In this article, the effects of oxidant addition on the morphology, structure and electrochemical performance of GNSs as electrode materials for electric double-layer capacitor (EDLC) were systematically investigated.

TL;DR: In this article, the theoretical background of impedimetric biosensors and various types of immunosensors along with the instrumental approaches that have been so far proposed in the literature for the evaluation of their performance are discussed.

TL;DR: Based on the analysis of the nitrogen functional groups before and after the stability tests, the ORR active sites of the NMCC catalysts are proposed to be pyridinic-N and quaternary-N functional groups as mentioned in this paper.

TL;DR: In this paper, Magneli phase titanium sub-oxides were identified (via x-ray diffraction) in the 1950s as a distinct series of electrically conducting compounds having the general formula TinO2n-1 where 3 < n < 10.

TL;DR: In this article, two kinds of functionalized graphene sheets were produced by thermal exfoliation of graphite oxide, and the results of N2 adsorption-desorption analysis indicate that both of two kinds have high BET surface areas.

TL;DR: In this paper, the electrochemical oxidation properties of TiN nanoparticles (NP) were studied under PEM fuel cell conditions and compared with conventional carbon black supports, and it was observed that TiN NP has a significantly lower rate of electrochemical oxidization than carbon black due to its inert nature and the presence of a native oxide/oxynitride layer on its surface.

TL;DR: In this article, a super-hydrophobic film was successfully deposited on magnesium alloy AZ31 by the microwave plasmaenhanced chemical vapor deposition (MPECVD) process and the film surface showed a static water contact angle of more than 150°.

TL;DR: In this paper, a composite with core-shell structures consisting of polyaniline and carbon nanotubes was prepared via in situ polymerization of aniline monomers by using multi-walled carbon Nanotubes with minimized defects as templates.

TL;DR: In this article, the performance of various commercial graphite materials were evaluated using galvanostatic charge/discharge cycling in a half-cell configuration over a wide range of C-rates (0.1 similar to 60C) and showed that graphite is capable of de-intercalating stored charge at high rates, but has poor intercalating rate capability.

TL;DR: In this paper, the effect of industrial pre-treatment on the corrosion performance of Mg alloy AZ31 sheet was investigated, and it was found that tempering accelerates the corrosion of AZ31.

TL;DR: In this article, the authors focused on the transport studies of PVA-chitosan blended electrolyte system and application in proton batteries and obtained a 2.07 × 10−5 Sc m−1.

TL;DR: In this paper, the authors investigated the electrochemical degradation of Reactive Red 195 (RR195) in aqueous solution on a Ti/SnO 2 -Sb/PbO 2 electrode.

TL;DR: Nano-structured electrodes fabricated at low temperature by an infiltration/impregnation technique have shown many advantages including superior activity and wider range of material choices as discussed by the authors, however, the high temperature not only limits material choice but also results in coarse particles with low electrocatalytic activity.

TL;DR: In this paper, a scale-up synthesis method was established to produce gram-quantities of Pt monolayer electrocatalysts and the core-shell structure of the Pt/Pd/C electrocatalyst has been verified using the HAADF-STEM Z-contrast images, STEM/EELS, and STEM/EDS line profile analysis.

TL;DR: In this paper, the properties of PANI-based CNTs obtained at different temperatures as electrode materials for supercapacitors using 30% aqueous solution of KOH as electrolyte were investigated by galvanostatic charge/discharge and cyclic voltammetry.

TL;DR: In this paper, it was shown that the performance of three triazole-based corrosion inhibitors for copper cannot be explained on this basis in a sound manner, thus emphasizing the importance of a rigorous modeling of the inhibitor-surface interaction in the corrosion inhibition studies.

TL;DR: In this article, the effectiveness of some benzimidazole derivatives against the corrosion of iron in solutions of nitric acid has been studied using density function theory calculations (DFT), weight loss, potentiodynamic polarization and electrochemical impedance spectroscopy (EIS).