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manufacturing method of a separator for a lithium secondary battery, and secondary battery with organic electrolyte lithium, used such a separator

机译：锂二次电池用隔膜的制造方法以及具有有机电解质锂的二次电池，使用了这种隔膜

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摘要

This invention relates to an organic electrolyte lithium secondary battery wherein lithium works as an active material, and comprises a negative electrode made of metallic lithium or lithium alloy, and relates more particular to a separator of the same battery. A conventional battery uses a separator made of poly ethylene and/or poly propylene, however, this invention uses microporous polyolefin membrane as a separator matrix whose pores are filled and closed with ionic conductive gel electrolyte. The separator uses a sheet whose at least one face contacting the negative electrode has a gel electrolyte layer on it. The gel electrolyte is formed by irradiating ultraviolet ray to a mixed solution wherein a mixture of which major components are oligomer and monomer polymertized by ultra violet ray is added to organic electrolyte. By using the separator according to this invention in an organic electrolyte lithium secondary battery, internal shortcircuits due to dendrited lithium growing on a negative electrode during a charge can be prevented, and a longer cycle life is expected. Further, burning accidents can be reduced. A highly reliable lithium secondary battery can be thus achieved. Note: The expression "dendrited lithium" means that metal lithium deposited on a negative electrode grows in a form of (or in a shape of ) dendrite.

机译：有机电解质锂二次电池技术领域本发明涉及一种有机电解质锂二次电池，其中锂用作活性材料，并且包括由金属锂或锂合金制成的负极，并且更具体地涉及该电池的隔膜。常规电池使用由聚乙烯和/或聚丙烯制成的隔板，但是，本发明使用微孔聚烯烃膜作为隔板基质，其孔被离子导电凝胶电解质填充和封闭。隔膜使用片材，该片材的至少一个与负极接触的面在其上具有凝胶电解质层。凝胶电解质是通过向混合溶液中照射紫外线而形成的，该混合溶液中将主要成分为低聚物和通过紫外线聚合的单体的混合物添加至有机电解质。通过在有机电解质锂二次电池中使用根据本发明的隔膜，可以防止由于在充电期间在负极上生长的树枝状锂引起的内部短路，并且期望更长的循环寿命。此外，可以减少燃烧事故。因此可以实现高度可靠的锂二次电池。注意：表述“树枝状锂”是指沉积在负极上的金属锂以树枝状（或呈树枝状）生长。

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公开/公告号DE69404602D1

专利类型
公开/公告日1997-09-04

原文格式PDF
申请/专利权人 MATSUSHITA ELECTRIC INDUSTRIAL CO. LTD. KADOMA OSAKA JP;
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申请/专利号DE19946004602T
发明设计人 MORIGAKI KENICHI NISHINOMIYA-SHI HYOGO 663 JP;KABUTO NORIKO MORIGUCHI-SHI OSAKA 570 JP;HARAGUCHI KAZUNORI OSAKA-SHI OSAKA 536 JP;
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申请日1994-10-06
分类号H01M10/40;H01M2/16;
国家 DE
入库时间 2022-08-22 03:12:37

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