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.
|Published (Last):||14 January 2011|
|PDF File Size:||12.85 Mb|
|ePub File Size:||16.89 Mb|
|Price:||Free* [*Free Regsitration Required]|
No particular limitation is imposed on the method for producing a lithium-ion battery comprising the separator of jie present invention. The lithium-ion secondary battery comprises an anode, a cathode, a separator, a solvent and a nonaqueous electrolyte.
JIS Z – Specular glossiness — Method of measurement (FOREIGN STANDARD)
However, since as shown in FIG. These materials may be copolymers. The cathode and the anode each comprise an active material, a binder polymer binding the active material and a collector, and a conductive agent may be added for the purpose of enhancing the conductivity of the electrodes. When the non-woven fabric and the ultra-microfibers are combined, 871 ultra-microfibers may have been included in the non-woven fabric at the time of production thereof beforehand and then may be subjected to a heat pressing to make a single 87441 of non-woven fabric.
Recently, the use of a non-woven fabric having excellent liquid retainability and the like as a separator has been, therefore, proposed. If the amount of the ultra-microfibers to the non-woven fabric mass is too less, the ratio of short-circuit would not be improved.
Jia film portion does not permeate ions and thus lowers the first discharge capacity. The nonaqueous electrolyte used in the lithium-ion secondary battery may be an electrolyte jix by dissolving a lithium salt in a solvent.
The present invention has an object to provide a separator for a lithium-ion secondary battery that solves the problems of the conventional art, i.
However, if the conventional non-woven fabric is made too thin, it may cause a cathode and an anode to short-circuit. These may be copolymers. The glossiness can be arbitrarily adjusted by the temperature and pressure at which the heat pressing is carried out. The lithium-ion secondary battery separator according to claim 12wherein the composite is a laminated and integrated composite.
A separator with a higher porosity provides a battery with better characteristics.
Zehntner ZOL 1150 Online-Glossmeter
The invention claimed is: For example, when the thermoplastic material is low in melting point, the heat pressing temperature is lowered to obtain a predetermined glossiness.
Separator for electrochemical device and method for producing the same, and electrochemical device and method for producing the same.
PE of polyolefins are particularly preferably used. Separator for a nonaqueous secondary battery and a nonaqueous secondary battery. These components may be those that can be usually used in a lithium-ion secondary battery except for using the separator of the present invention as a separator. With regard to the lower limit glossiness, the glossiness which is low even after being heat-pressed indicates that the fibers do not fuse by heat-pressing and thus the non-woven fabric has a problem in strength.
However, this type of separator has an extremely small pore size jid is on the order of submicron or smaller and thus when the viscosity of an electrolyte is high, has had a problem that the s is unlikely to permeate into the separator and the efficiency of the battery assembly becomes poor. Int’ l Search Report issued on Jul. 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 and polyethylene, respectively.
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. A mixture of 15 g of artificial graphite, 0.
The separator is thin and does not short-circuit and has excellent electrolyte retainability and rate characteristics.
When a composite fiber is used, preferred is such a temperature range that only a component which should 841 heat-fused melts and the other components does not melt. The kis used in the present invention may be produced by various methods such as Melt-Blown method, electrospinning and melt-electrospinning methods.
Core-in-sheath type fibers core: The core-in-sheath type composite fibers of polyolefins are preferably used in combination with various fibers formed from the above-exemplified thermoplastic materials other than polyolefins.
Accessories Popular Accessories Popular Accessories. Photos of the surface of a fiber assembly thus produced was taken with an electron scanning microscope SU manufactured by Hitachi, Ltd.
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. Furthermore, since the separator has the fine pores formed linearly in the thickness direction and thus is rather poor in electrolyte retainability, the expansion and contraction of the iis progresses 7841 with repeated charge and discharge causing a problem that the separator is compressed to push out the electrolyte retained therein and thus gradually reduced in capacity.
In a core-in-sheath type composite fiber, the fibers are easily fused to each other by a heat pressing treatment such as heat press or heat lamination so as to enhance the strength of the non-woven fabric. Examples of the lithium salt dissolved in the solvent include lithium perchlorate, lithium hexafluorophosphate, lithium tetrafluoroborate, lithium hexafluoroarsenate, lithium trifluoro sulphate, lithium perfluoromethylsulfonylimide and lithium perfluoroethylsulfonylimide.
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. Any conventional method for producing a lithium-ion secondary battery may be employed.
PC Software Data logging software. Measuring Accuracy 0 – GU: No particular limitation is imposed on the type of method for heat-pressing the composite product if the method is for applying pressure to the product to be jid while heat is applied to the product to soften the fibers and melt a part thereof.
Nonaqueous electrolyte secondary battery js and nonaqueous electrolyte secondary battery. The present invention will be described in more detail with the following examples but is not limited thereto. These may be used alone or in combination. Popular Accessories Data logging software. Among these materials, those containing polypropylene as the main component are preferably used.
Applications Measuring instrument for several industries such as paint, plastics, paper, foil and metal industry For all gloss measurements Gloss measurement for manufacturing of sheet metal, floor coverings kis other flat or reel products Finishing processes such as application of coating of all types, e. The non-woven fabric may contain various other fibers in addition to the fibers of the above-exemplified thermoplastic materials.
The average of the measurement results at a total of the 10 sites was defined as the glossiness of the non-woven fabric. Randomly, 10 photos from the photos taken were selected to measure the diameters of all the fibers in the 10 photos and calculate the average of the diameters thereby obtaining the average diameter of the fibers.
The collector may be of a foil- or mesh-like shape. Solution to Problem The present invention has been accomplished as the results of extensive studies to achieve the above object. Advantageous Effect of Invention The lithium-ion secondary battery separator of the present invention is thin and safe because it is composed of ultra-microfibers and it does not short-circuit in spite of being high in porosity and also excellent in electrolyte retainability and rate characteristics.
8471 include various thermoplastic materials that are polyolefins such as polyethylene, polypropylene and polystyrene, polyesters such as polyethylene terephthalate, polytrimethylene terephthalate, polybutylene terephthalate, polyethylene naphthalate jiz polybutylene naphthalate, polyamides, polyimides, polyacrylonitriles and polyvinyl alcohols.