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:
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).