It is the only glossmeter combining highest accuracy, ease-of-use and multiple functionality – essential for today`s testing requirements. JIS Z Road Markings – Traffic Signs. Gloss. Laboratory. Road Markings. Traffic Signs. The following devices are in accordance with JIS Z The very first glossmeter featuring a ” touchscreen display for measurement of all gloss ranges from matt to high gloss up to 2′ GU.
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These polymers may be used alone or in combination.
The porosity of the non-woven fabric can be arbitrarily adjusted with the type of fibers to be used or conditions for the heat-pressing jsi. When the non-woven fabric contains various other fibers, the weight ratio of the fibers of a thermoplastic material and the various other fibers is preferably from No particular limitation is imposed on the shape of the lithium-ion secondary battery thus produced, which may be of a flattened or zz shape such as a cylindrical or square shape.
The measurement was carried out randomly at 5 sites in each of the TD direction and MD direction of the non-woven jsi. The pressure is from 0.
JIS Z – Zehntner GmbH
This application is a Section of International Application No. The lithium-ion secondary battery separator according to claim 5wherein the core component and sheath component of the core-in-sheath type composite fibers are polypropylene and polyethylene, respectively. Injection of the nonaqueous electrolyte is suitably carried out using a vacuum injection method but is not limited thereto. Measuring Geometries dual angle: For example, a mixture of fibers of PP and fibers of PE used in a non-woven form can obtain an effect that is close to that obtained with the core PP and sheath PE type composite fiber.
Examples of the method include heat press, heat lamination and the like. The lithium-ion secondary battery separator according to claim 1wherein the thermoplastic material is at least one type of thermoplastic material selected from the group consisting of polyolefins, polyesters, polyamides, polyimides, polyacrylonitriles and polyvinyl alcohols. Examples include various thermoplastic materials that are polyolefins such as polyethylene, polypropylene and polystyrene, polyesters such as polyethylene terephthalate, polytrimethylene terephthalate, polybutylene terephthalate, polyethylene naphthalate and polybutylene naphthalate, polyamides, polyimides, polyacrylonitriles and polyvinyl alcohols.
Among these materials, those containing polypropylene as the main component are preferably used. The binder polymer may be polyvinylidene fluoride PVdFa PVdF-based copolymer resin such as copolymers of vinylidene fluoride, hexafluoropropylene HFP or perfluoromethyl vinyl ether PFMV and tetrafluoroethylene, polytetrafluoroethylene, fluororesins such as fluoro-rubber, a hydrocarbon-based polymer such as styrene-butadiene copolymers and styrene-acrylonitrile copolymers, carboxylmethyl cellulose, or a polyimide resin but are not limited thereto.
Bonding of the separator and the electrode is mainly carried out with a thermal compression bond method, which may be carried out in a dry state where the nonaqueous electrolyte solution is not contained or a wet state where the nonaqueous electrolyte solution is contained.
The concentration of the lithium salt dissolved in the solvent is preferably within the range of 0. The blend ratio of the active material, the binder polymer and the conductive agent is preferably 3 to 30 parts by mass of the binder polymer on the basis of parts by mass of the active material and 10 parts by mass or less of the conductive agent if contained.
TECHNICAL FIELD The present invention relates to separators that are excellent in electrolyte retainability, rate characteristics, and safety and can lower the internal resistance of an electrochemical device and extend the working life thereof for lithium-ion secondary batteries.
If too many ultra-microfibers are used, they affect the basis weight or thickness of the composite non-woven fabric.
Examples of the active material include those 87411 composed of a lithium-containing transition metal oxide. The lithium-ion secondary battery separator according to claim 14wherein the core component and sheath component of the core-in-sheath type composite fibers are polypropylene uis polyethylene, respectively. In the present invention, the non-woven fabric is preferably formed from core-in-sheath type composite fibers containing a thermoplastic material as the sheath component or the core-in-sheath type composite jiis and other fibers of thermoplastic materials.
Specifically, a method is generally used, wherein an assembly of a cathode and an anode joined together via the separator of the present invention is put in an exterior package and an nonaqueous electrolyte is injected therein, followed by sealing the injection port.
The number of the film portion and the glossiness are in a proportional relation. Therefore, in the case where the ultra-microfibers and the non-woven fabric are combined, the range of the most appropriate glossiness is not affected by ratio of short-circuit and defined with the first charge and discharge capacity.
Zehntner ZOL Glossmeter
Recently, the use of a non-woven fabric having excellent liquid retainability and the like as a separator has been, therefore, proposed.
No particular limitation is imposed on the type of such various fibers, which may be, for example, cellulose or various fluorinated resins. The lithium-ion secondary battery separator according to claim 2wherein the non-woven fabric is formed from core-in-sheath type composite fibers containing a thermoplastic material as the sheath component or the core-in-sheath type composite fibers and other fibers of thermoplastic materials.
A non-woven fabric that is thick and large in volume would have a problem that it produces film portions when being heat-pressed and thus deteriorates the battery characteristics. Although a non-woven fabric having a glossiness of 30 can be used, most preferred glossiness range is a range between 20 or lower which does not reduce the first charge and discharge capacity and 3 or higher in terms of strength.
Separator for electrochemical device, electrochemical device and method for manufacturing the same.
In particular, the cathode collector is preferably aluminum js and the anode collector is preferably copper foil. Measuring Accuracy 0 – GU: Reporting software Data logging software. Thereupon, the difference in melting point between the non-woven fabric and the ultra-microfibers should be considered so that the ultra-microfibers are not melted.