When charging or discharging a lithium-ion-battery (LIB), lithiation delithiation of the electrodes takes place. Especially in case anode active materials, often leads to significant volume increase. The latter can cause rearrangement particles. Although volumetric changes state-of-the-art cathode materials have been found be smaller than for anodes, they remain relevant. combined anodes and ca...

Graphene is a two-dimensional form of graphite made up of a single layer of carbon atoms in a honeycomb lattice that has attracted tremendous interest for its novel physical properties. A key challenge that has emerged is how to synthesize large amounts of graphene (large area or mass) at low cost. The objective of this project is to explore an entirely new method to exfoliate graphene from com...

This work intends to extend the electromechanical characterisation of dielectric elastomer actuators. Planar actuators were realised with a 50 m-thick film of an acrylic elastomer coated with compliant electrodes. The isotonic transverse strain, the isometric transverse stress and the driving current, due to a 2 s high voltage impulse, were measured for four electrode materials (thickened elect...

Laser-induced graphitization leads to screen printed highly oriented pyrolytic graphite electrodes.

Disposable sensors based on a pencil graphite electrode were described for detection of alkyl phenols. The performances of the disposable bare pencil graphite electrode (PGE) and PGE modified with carbon nanotubes, regarding the cyclic and differential pulse voltammetric determination of 4-nonylphenol, 4-octylphenol, and 4-tert-octylphenol, were compared. Some experimental variables of the elec...

The erosion rates for hemispherical electrodes, 2.5 em in diameter, made of graphite, copper-graphite, brass, two types of copper-tungsten, and three types of stainless steel have been examined in a spark gap filled with air or nitrogen at one atmosphere. The electrodes were subjected to 50,000 unipolar pulses (25 )ls, 4-25 kA, 5-30 kV, 0.1-0.6 Coul/shot) at repetition rates ranging from 0.5 to...

A tale of two electrodes: The environmentally friendly K2SO4 electrolyte was employed to facilitate dual electrochemical exfoliation graphite electrodes produce graphene. Two graphene materials with distinct differences in oxidation degree and defect density were obtained.

Electrochemical oxidation of tramadol at pencil graphite electrode has been investigated using cyclic, differential pulse and square wave voltammetric techniques. In pH 9.2 phosphate buffer, tramadol showed an irreversible oxidation peak at 0.77 V. The dependence of the current on pH, concentration and scan rate was investigated to optimize the experimental conditions for the determination of t...