The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 21, 2017
Filed:
May. 21, 2013
Jx Nippon Oil & Energy Corporation, Tokyo, JP;
Abstract
A lithium-ion secondary battery separator resolves defects of a non-woven fabric separator which is not suitable for use in such a battery. The separator is thin and does not short-circuit and has excellent electrolyte retainability and rate characteristics. The separator includes a composite of a non-woven fabric having a basis weight of 2 to 20 g/mformed from fibers of a thermoplastic material having an average fiber diameter of 5 to 40 μm and ultra-microfibers having an average fiber diameter of 1 μm or less in an amount of ⅓ to 3 times the mass of the non-woven fabric. The composite has a thickness of 10 to 40 μm after heat-pressing treatment under conditions that the non-woven fabric has a glossiness (JIS Z 8741) measured at 60° in the range of 3 to 30 and a thickness of 10 to 40.