摘要:
Between the high electronic conduction structures of the multilayer assembly an electric voltage signal is applied of which at least one portion includes an alternating component which has an amplitude between 0.05 and 100 volts and a frequency lower than 5 kHz and preferably between 2 and 2000 Hz so as to generate within the multilayer assembly an alternating ion current susceptible of producing a heating of the ion conducting macromolecular material by Joule effect. Application to the heating of electrochemical current generators in thin layers with solid polymer electrolyte or to the surface heating of elements of various regular or irregular shapes of which the surface is coated with the multilayer assembly.
摘要:
On applique entre les structures à conduction électronique élevée de l'ensemble multicouche un signal de tension électrique dont au moins une partie comporte une composante alternative, qui possède une amplitude comprise entre 0,05 et 100 volts et une fréquence inférieure à 5 kHz et de préférence comprise entre 2 et 2000 Hz, de manière à générer dans l'ensemble multicouche un courant ionique alternatif susceptible de produire un échauffement du matériau macromoléculaire à conduction ionique par effet Joule. Application au chauffage de générateurs électrochimiques de courant en couches minces à électrolyte solide polymère ou encore au chauffage superficiel d'éléments de formes diverses régulières ou irrégulières dont la surface est revêtue de l'ensemble multicouche.
摘要:
Le système optique, qui comporte une couche mince d'un matériau macromoléculaire à conduction ionique, ou électrolyte solide polymère, en sandwich entre deux électrodes comportant chacune un dépôt conducteur porté par une plaque support de telle sorte que l'un au moins des dépôts conducteurs et la plaque support associée sont transparents, est chauffé en appliquant entre les dépôts conducteurs desdites électrodes un signal de tension électrique dont au moins une partie comporte une composante alternative, qui possède une amplitude comprise entre 0,05 et 100 volts et une fréquence inférieure à 5 kHz et de préférence comprise entre 2 et 2000 Hz, de manière à générer dans ledit système optique un courant ionique alternatif susceptible de produire un échauffement du matériau macromoléculaire à conduction ionique par effet Joule. Le système optique à chauffer, qui peut être un dispositif électrochrome, peut avoir notamment une structure de type vitrage ou encore une structure de type miroir.
摘要:
Disclosed is a method for grafting a polymer onto the surface of a carbonate material with carboxyl, amine, and/or hydroxyl functions on its surface. Said material is placed in suspension in a solution including the polymer to be grafted, which has a carboxyl, amine, and/or hydroxyl function, said solution also being comprised of a polymer solvent. A process which stimulates the dehydration into a carboxyl function of an amine and/or hydroxyl function is then performed, and the polymer is grafted onto the carbonate material using ester or amide links. The invention can be used in the cathode or naode of an electrochemical generator, in polymer materials with low polar properties, in ink, and also as a conductive coating on flexible plastic used as an electrical contact, as electromagnetic shielding, or as static protection.
摘要:
An ionic conducting material, the preparation thereof and uses of said material are disclosed. The material includes at least one solution of at least one ionic compound in an aprotic solvent, which compound is selected from compounds (1/mM)+[(ZY)2N]-, (1/mM)+[(ZY)3C]-, (1/mM)+[(ZY)2CQ]-, Wherein Y is SO¿2? or POZ; Q is -H, -COZ or Z; each substituent Z is independently a fluorine atom or an optionally perfluorinated organic group optionally having at least one polymerisable function, one of substitutents Z being a fluorine atom; and M is a cation. The material is useful in electrochemical generators, supercapacitors, polymer doping and electrochromic devices.
摘要:
The invention relates to a method of purifying an ionic electrolyte containing at least one alkaline earth salt, said method comprising at least one contact step involving particles of at least one calcium salt. The inventive method can be used to obtain novel electrolytes which are especially characterised by the particularly-low water content thereof. The corresponding electrochemical generators that contain the electrolyte as a component are characterised by excellent stability and are very secure.
摘要:
An improved electrochemical energy storing device includes a number of thin-film electrochemical cells which are maintained in a state of compression through use of an internal or an external pressure apparatus. A thermal conductor, which is connected to at least one of the positive or negative contacts of each electrochemical cell, conducts current into and out of the electrochemical cells and also conducts thermal energy between the electrochemical cells and thermally conductive material disposed on a wall structure adjacent the conductors. The wall structure includes electrically resistive material, such as an anodized coating or a thin film of plastic. The thermal conductors are fabricated to include a spring mechanism which expands and contacts to maintain mechanical contact between the electrochemical cells and the thermally conductive material in the presence of relative movement between the electrochemical cells and the wall structure. An active cooling apparatus may be employed external to a hermetically sealed housing containing the electrochemical cells to enhance the transfer of thermal energy into and out of the electrochemical cells. An integrated interconnect board may be disposed within the housing onto which a number of electrical and electro-mechanical components are mounted. Heat generated by the components is conducted from the interconnect board to the housing using the thermal conductors.
摘要:
An improved electrochemical energy storing device includes a number of thin-film electrochemical cells which are maintained in a state of compression through use of an internal or an external pressure apparatus. A thermal conductor, which is connected to at least one of the positive or negative contacts of each electrochemical cell, conducts current into and out of the electrochemical cells and also conducts thermal energy between the electrochemical cells and thermally conductive material disposed on a wall structure adjacent the conductors. The wall structure includes electrically resistive material, such as an anodized coating or a thin film of plastic. The thermal conductors are fabricated to include a spring mechanism which expands and contacts to maintain mechanical contact between the electrochemical cells and the thermally conductive material in the presence of relative movement between the electrochemical cells and the wall structure. An active cooling apparatus may be employed external to a hermetically sealed housing containing the electrochemical cells to enhance the transfer of thermal energy into and out of the electrochemical cells. An integrated interconnect board may be disposed within the housing onto which a number of electrical and electro-mechanical components are mounted. Heat generated by the components is conducted from the interconnect board to the housing using the thermal conductors.
摘要:
New ionic conduction material comprised of a salt diluted in a liquid solvent. The salt is represented by one of the following formulae: M[RF-SO2-N-SO2-R'F]; M[RF-SO2-N-CO-R'F]; M[RF-CO-N-CO-R'F], or formula (IV). Application to electrochemistry.
摘要:
An in situ thermal management system for an energy storage device. The energy storage device includes a plurality of energy storage cells each being coupled in parallel to common positive and negative connections. Each of the energy storage cells, in accordance with the cell's technology, dimensions, and thermal/electrical properties, is configured to have a ratio of energy content-to-contact surface area such that thermal energy produced by a short-circuit in a particular cell is conducted to a cell adjacent the particular cell so as to prevent the temperature of the particular cell from exceeding a breakdown temperature. In one embodiment, a fuse is coupled in series with each of a number of energy storage cells. The fuses are activated by a current spike capacitively produced by a cell upon occurrence of a short-circuit in the cell, thereby electrically isolating the short-circuited cell from the common positive and negative connections.