摘要:
The composite particle for an electrode in accordance with the present invention contains an electrode active material, a conductive auxiliary agent having an electronic conductivity, and an oxidizing/reducing agent. Therefore, this composite particle can construct an effective conductive network, and effectively provide so-called oxidizing/reducing capacity due to the oxidizing/reducing agent. Hence, when the composite particle for an electrode in accordance with the present invention is used as a constituent material of an electrode in an electrochemical device, the electrochemical device can realize a higher capacity.
摘要:
The electrode of the present invention is provided with an active material-containing layer comprising as the structural material composite particles composed of an electrode active material, a conductive additive and a binder, and a current collector in electrical contact with the layer. The composite particles are formed by integrating the conductive additive and binder with the electrode active material particles. The active material-containing layer is formed by subjecting powder comprising at least the composite particles to pressurization treatment to form a sheet, and placing the sheet at the location of the current collector at which the active material-containing layer is to be formed. The electrode active material and conductive additive in the active material-containing layer are non-isolated and electrically linked. This construction allows an electrode with excellent electrical characteristics to be realized, which exhibits adequately reduced internal resistance and easily permits increased energy density to be achieved for electrochemical devices.
摘要:
Composite particles for an electrode of the invention are produced through a granulating step in which, a conductive additive and a binder are brought into a close contact with particles consisting of the electrode active material to integrate with each other. The granulating step preferably comprises a process for preparing a stock solution comprising the binder, the conductive additive and a solvent, a process for forming a fluidized bed by throwing particles of electrode active material into a fluidizing bathe and a process for bringing the particles of electrode active material and the particles of conductive additive into a close contact with the binder by spraying a stock solution into the fluidizing bathe, allowing the stock solution adhering to the particles of electrode active material and drying the same to remove the solvent from the adhered stock solution. Composite particles thus obtained are used as the constituent material for electrode, and further, the electrode is used as an anode and/or cathode of an electrochemical element; thereby, the internal resistance of electrode can be reduced satisfactorily and the power density of the electrochemical element can be increased satisfactorily.
摘要:
An electrochemical device comprises, at least, a first electrode, a second electrode, and an electrolyte layer having an ionic conductivity. The first and second electrodes oppose each other by way of the electrolyte layer. The first and second electrodes comprise a composite particle containing an electrode active material, a conductive auxiliary agent having an electronic conductivity, and a binder adapted to bind the electrode active material and conductive auxiliary agent to each other. In the composite particle, the electrode active material and conductive auxiliary agent are electrically coupled to each other without being isolated.
摘要:
An electrode comprises a planar collector, and an active material containing layer disposed on the collector. The active material containing layer comprises a plurality of particles containing an active material, and a binder for binding the particles containing the active material to each other and the particles containing the active material to the collector. The collector has a surface depressed in conformity to a form of the particles containing the active material.
摘要:
The coating liquid for forming an electrode in accordance with the present invention includes, as constituents, a granulated particle containing an electrode active material, a conductive auxiliary agent having an electronic conductivity, and a binder capable of binding the electrode active material and conductive auxiliary agent to each other; and a liquid adapted to disperse or dissolve the granulated particle, whereas the granulated particle is formed by way of a granulating step of preparing a material liquid containing the binder, the conductive auxiliary agent, and a solvent, and then attaching the material liquid to a surface of a particle made of the electrode active material and bringing a particle made of the binder and a particle made of the conductive auxiliary agent into close contact with the surface. An electrode is formed by using the coating liquid for forming an electrode, whereas an electrochemical device is equipped with the electrode.
摘要:
An electrochemical device comprises, at least, a first electrode, a second electrode, and an electrolyte layer having an ionic conductivity. The first and second electrodes oppose each other by way of the electrolyte layer. The first and second electrodes comprise a composite particle containing an electrode active material, a conductive auxiliary agent having an electronic conductivity, and a binder adapted to bind the electrode active material and conductive auxiliary agent to each other. In the composite particle, the electrode active material and conductive auxiliary agent are electrically coupled to each other without being isolated.
摘要:
The method of making a composite particle for an electrode in accordance with the present invention comprises a granulating step of integrating a conductive auxiliary agent and a binder adapted to bind the conductive auxiliary agent and an electrode active material together with a particle made of the electrode active material while in close contact with each other in an inert gas atmosphere so as to form a composite particle for an electrode containing the electrode active material, conductive auxiliary agent, and binder. When the composite particle obtained by this method is used as a constituent of an electrode, an electrode having an excellent electrode characteristic and an electrochemical device having excellent electrochemical characteristics can be formed easily and reliably.
摘要:
The electrode composite particles of this invention comprise an electrode active substance, an conductive auxiliary agent having electron conductivity, and a binder which binds the electrode active substance with the conductive auxiliary agent. The particles of electrode active substance contain large diameter particles and small diameter particles which simultaneously satisfy conditions expressed by the relations: 1 μm≦R≦100 μm (1) 0.01 μm≦r≦5 μm (2) ( 1/10000)≦(r/R)≦(⅕) (3) R is the average particle diameter of the large diameter particles, and r is the average particle diameter of the small diameter particles.
摘要:
The method of making a composite particle for an electrode in accordance with the present invention comprises a granulating step of integrating a conductive auxiliary agent and a binder adapted to bind the conductive auxiliary agent and an electrode active material together with a particle made of the electrode active material while in close contact with each other in an inert gas atmosphere so as to form a composite particle for an electrode containing the electrode active material, conductive auxiliary agent, and binder. When the composite particle obtained by this method is used as a constituent of an electrode, an electrode having an excellent electrode characteristic and an electrochemical device having excellent electrochemical characteristics can be formed easily and reliably.