Transparent conductors—A status review

Note: Times Cited: 875 Reference EPFL-ARTICLE-206025doi:10.1021/cr0501846View record in Web of Science URL: ://WOS:000249839900009 Record created on 2015-03-03, modified on 2017-05-12

Complex Hydrides for Hydrogen Storage

Hydrogen storage in Mg: A most promising material

A review on the current progress of metal hydrides material for solid-state hydrogen storage applications

Recent advances and remaining challenges of nanostructured materials for hydrogen storage applications

The problem of solid state hydrogen storage

A preliminary study concerning the electrical conductivity of tin oxide films obtained by a procedure of dipping sol-gel technique onto glass substrate is reported. The tin oxide-sol solution was prepared starting from stannous chloride. Crystallization of amorphous tin oxide was followed by means of XRD and DTA analyses. The morphology of the coatings was observed by SEM. By this method, it has been verified that tin oxide can be easily doped by means of zirconium and titanium oxides, giving films, in which electrical conductivity is strongly increased.

Electrical conductivity of tin oxide films prepared by the sol-gel method

Hydrogen storage in Mg–Ni–Fe compounds prepared by melt spinning and ball milling

Magnesium hydride–graphite composites produced via ball milling exhibit fast H2 desorption/absorption kinetics; moreover, their activation behaviour is particularly attractive if compared with MgH2-based materials obtained so far. In this work, we report the phase analysis (by X-ray diffraction) and investigate the crystal structure and the desorption behaviour (using a home-made Sievert apparatus) of MgH2–graphite composites produced by ball milling. Milling with graphite is found to improve the desorption rate of MgH2 changing the reaction mechanism.

Hydrogen desorption from magnesium hydride-graphite nanocomposites produced by ball milling

Hybrid organic-inorganic materials were synthesized from acid catalysed sols of tetraethyl orthosilicate, 3-glycidoxypropyltrimethoxysilane and titanium or zirconium alkoxides. The mechanical properties of these materials were measured in different conditions of preparation. The elastic modulus E was determined by a resonance method and by Knoop microindentation. After a thermal treatment at 125°C for 120 h, E was around 3–5 and 1–2 GPa for the samples synthesized with titanium butoxide or zirconium butoxide, respectively. An increase in E in the samples cured for longer times was observed. Knoop microhardness also increased with the heating time and was larger in samples synthesized from titanium alkoxides than zirconium alkoxides. The two methods gave results in good agreement when applied to samples treated for shorter times. In the other samples Knoop microindentation gave a larger value of E compared to the resonance vibration method. Hardness to elastic modulus ratio, H/E, was evaluated by Knoop microindentation. The elastic recovery at the longest heat treatment time was similar to that of soda-lime glasses. Fracture toughness was measured by three points flexural test, a KIc in the range of 0.4–0.5 MPa m1/2 was evaluated for samples treated during 168 h.

Amedeo Maddalena

Papers

The problem of solid state hydrogen storage

Electrical conductivity of tin oxide films prepared by the sol-gel method

Hydrogen storage in Mg–Ni–Fe compounds prepared by melt spinning and ball milling

Hydrogen desorption from magnesium hydride-graphite nanocomposites produced by ball milling

Mechanical Properties of 3-Glycidoxypropyltrimethoxysilane Based Hybrid Organic-Inorganic Materials