摘要:
L'inventïon concerne un ionogel utilisable pour constituer un film autosupporté formant un électrolyte solide d'un dispositif électrochimique, un tel dispositif incorporant cet ionogel et un procédé de fabrication de cet ionogel. L'invention s'applique de manière générale à tous dispositifs de stockage d'énergie tels que des supercondensateurs ou des batteries d'accumulateurs (e.g. lithium-ion). Un ionogel selon invention comprend : - une matrice de confinement polymérique qui comprend au moins un acide polylactique, et - au moins un liquide ionique confiné dans cette matrice. Selon l'invention, cette matrice comprend en outre un polycondensat d'au moins un précurseur moléculaire sol-gel à groupe(s) hydrolysable(s).
摘要:
The invention relates to a monolithic ionogel with an organic confinement matrix for at least one ionic liquid, and a method for manufacturing same. An ionogel according to the invention comprises a biopolymer confinement matrix with a cross-linked polysaccharide base and an ionic liquid confined in a network formed by the matrix, and it is such that the polysaccharide has siloxane cross-linking bridges, the ionogel being a chemical gel able to constitute a self-supported solid electrolyte by itself. This ionogel is obtained using a method comprising silanisation of the polysaccharide in a basic aqueous solution by a silanisation agent, and polycondensation of the silanised polysaccharide. In a first embodiment, this method comprises preparing a hydrogel with a polysaccharide base that is silanised and cross-linked by sol-gel, then exchange reactions of solvents with increasing hydrophobicities. In a second preferred embodiment, it comprises mixing a first solution comprising the ionic liquid in an acid medium and a second solution containing the silanised and non-cross-linked polysaccharide, such that its cross-linking takes place through that mixing.
摘要:
The invention relates to porous polymer materials with very high levels of thermally and/or electrically conductive fillers, and to a method for producing the porous composite material comprising at least one polymer phase forming a binder and at least one filler, said method comprising the steps of: hot-melt-mixing the polymer phase, the fillers, and a sacrificial polymer phase so as to obtain a mixture; shaping the mixture; and eliminating the sacrificial polymer phase.
摘要:
L'invention concerne une cathode utilisable dans une cellule de batterie lithium-ion à électrolyte à base d'un sel de lithium et d'un solvant non aqueux, un procédé de fabrication de cette cathode et une batterie lithium-ion dont la ou les cellules incorporent cette cathode. Cette cathode est à base d'une composition polymérique obtenue par voie fondue et sans évaporation de solvant qui est le produit d'une réaction de mélangeage à chaud d'une matière active et d'additifs comprenant un liant polymérique et une charge électriquement conductrice. Selon l'invention, ce liant est à base d'au moins un élastomère réticulé et ces additifs comprennent en outre au moins un composé organique non volatil utilisable dans le solvant d'électrolyte, la composition comprenant avantageusement ladite matière active selon une fraction massique égale ou supérieure à 90 %.
摘要:
The invention relates to a gelled aqueous polymer composition for forming, by means of drying then pyrolysis, a monolithic porous carbon, to a pyrolysed carbonated composition produced by the drying, followed by the pyrolysis, of said gelled composition, to a porous carbon electrode for a supercapacitor comprising said pyrolysed composition, and to methods for producing said respectively gelled and pyrolysed compositions. A gelled composition according to the invention, produced from the polycondensation of polyhydroxybenzene(s) and hexymethylenetetramine, is such that the hexymethylenetetramine comprised therein represents a mass fraction of between 7% and 15% inclusive. Said gelled composition is produced by a) polycondensation in an aqueous solvent of the polyhydroxybenzene(s) and hexymethylenetetramine, followed by b) gelling by heating of said polycondensate.