Commissariat a L'energie Atomique Et Aux Energies Alternatives

Commissariat a L'energie Atomique

Lionel Dubois

Thibaut Gutel

Hervé Desvaux

Adriana Iordache

Ashok Nanjundan

Serge Gambarelli

Jean-François Jacquot

The present invention concerns the use, as an active electrode material, of compounds comprising at least one entity of formula (I): in which the phenyl group is substituted with one to four identical or different substituent(s) R, chosen from a hydrogen atom, a halogen atom chosen from fluorine, chlorine, bromine or iodine, a &#x2014;C(&#x2550;S)&#x2014;S&#x2014;C+ group, an &#x2014;O&#x2014;C+ group, an &#x2014;S&#x2014;C+ group, C+ being an alkali cation chosen from Li+, Na+ and K+, a (C1-C12) alkyl radical, a (C2-C12) alkenyl radical, a (C6-C14) aryl or heteroaryl radical; or two vicinal substituents R that can, if appropriate, be linked to each other to together form a 3- to 7-membered ring optionally including another heteroatom chosen from N, O or S; in the base or salt form; and the tautomeric forms of same. It also concerns an electrode material, an electrode and a lithium, sodium or potassium secondary battery, obtained from these compounds.

Material for an electrode of an organic battery comprising benzene-bis(dithioic) acid derivatives

The present invention relates to a method for preparing graphene substantially free of contamination by metallic, magnetic, organic and inorganic impurities, and also to the use of the resulting graphene for the production of transparent electrodes, batteries, electron-acceptor or electron-donor materials, in particular in photovoltaic systems, photovoltaic panels, transistor channels, in particular in electronics, nonlinear emitters or absorbers of infrared photons, current-conducting electrodes, anti-static coatings, chemical detectors, vias and interconnections in electronics, current-conducting cables, and solar cells.

Method for preparing graphene

The invention relates to an NMR analysis system and method for obtaining an NMR signal from a liquid solution enhanced in relation to the value that it would have on the basis of the thermodynamic equilibrium. It has been discovered in a surprising manner that if the spins of the cores of a highly-polarized polarization source and the spins of the cores of the liquid solution are irradiated such that a polarization transfer, such as a Hartmann-Hahn transfer, of the spins of the cores of the source to the spins of the cores of the liquid solution is carried out by means of a coherent coupling resulting from the dipolar field created by the cores of the source, an NMR signal of the liquid solution is obtained, said signal being significantly enhanced in relation to the value it would have on the basis of the thermodynamic equilibrium.

Method for enhancing the NMR signal of a liquid solution

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Verrens-Arvey, France

Lionel Dubois