摘要:
The present invention pertains to an electrode-forming composition, to use of said electrode-forming composition in a process for the manufacture of an electrode, to said electrode and to an electrochemical device comprising said electrode. The electrode-forming composition comprises at least one partially fluorinated fluoropolymer comprising recurring units derived from at least one fluorinated monomer and at least one functional hydrogenated monomer comprising at least one carboxylic acid end group, at least one electro-active compound, at least one liquid medium comprising at least one organic carbonate or at least one ionic liquid, and at least one metal salt.
摘要:
The invention pertains to a process for manufacturing a fluoropolynner film comprising a fluoropolymer hybrid organic/inorganic composite, said process comprising the following steps: (i) providing a mixture of: - at least one fluoropolymer [polymer (F)]; - at least one metal compound [compound (M)] having formula: X 4-m AY m wherein m is an integer from 1 to 4, A is a metal selected from the group consisting of Si, Ti and Zr, Y is a hydrolysable group and X is a hydrocarbon group, optionally comprising one or more functional groups; - a liquid medium consisting essentially of at least one ionic liquid (IL) and, optionally, at least one additive (A); - optionally, at least one electrolytic salt (ES); and - optionally, at least one organic solvent (S); (ii) hydrolysing and/or polycondensing said compound (M) to yield a liquid mixture comprising fluoropolymer hybrid organic/inorganic composite comprising inorganic domains and incorporating said liquid medium; (iii) processing a film from the liquid mixture obtained in step (ii); and (iv) drying and then, optionally, curing the film obtained in step (iii) for obtaining the fluoropolymer film. The invention also pertains to the fluoropolymer film obtained from said process and to use of said fluoropolymer film in electrochemical and photo-electrochemical devices.
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 an accumulator or battery including at least one composite electrode including a step of pouring a medium comprising at least one ionic liquid and a lithium, sodium or magnesium salt with at least one inorganic molecular precursor or a polymerisable monomer, said medium being in excess, and a step of in situ polycondensation or polymerisation.
摘要:
The invention relates to a method of preparing an ionic conducting gel in solid form, known as ionogel. The inventive method is characterised in that it comprises a step consisting in mixing an ionic liquid with at least one molecular precursor containing at least one hydrolysable group, if necessary in the presence of an acid, such as a carboxylic acid. The mixture is subsequently left to stand for one or more days until a gel is formed by polycondensation of the molecular precursor(s). Said gel contains the aforementioned ionic liquid and can be set, in particular in transparent monolithic solid form.