公开(公告)号：KR100485352B1

公开(公告)日：2005-04-28

申请号：KR1020030010677

申请日：2003-02-20

Applicant: 한국전자통신연구원

Inventor： 김광만 ,  고장면 ,  류광선 ,  장순호

IPC: H01M2/16

Abstract: 본 발명은 표면개질된 다공성 고분자막의 제조방법에 관한 것으로, 특히, 글리시딜 메타크릴레이트(glycidyl methacrylate) 등의 극성기를 가진 단량체를 광 중합법에 의해 다공성 고분자막의 표면에 그라프트 반응(grafting reaction)시켜 다공성 고분자막의 표면에너지를 증가시키고, 이와같이 표면에너지가 증가된 다공성 고분자막을 리튬 2차전지의 분리막으로 사용하여 리튬 2차전지의 수명과 용량을 향상시킨 발명이다.

公开(公告)号：KR1020040075199A

公开(公告)日：2004-08-27

申请号：KR1020030010677

申请日：2003-02-20

Applicant: 한국전자통신연구원

Inventor： 김광만 ,  고장면 ,  류광선 ,  장순호

IPC: H01M2/16

Abstract: PURPOSE: Provided is a lithium secondary battery having excellent service life and high capacity, which includes a surface-modified porous polymeric separator capable of preventing electrolyte leakage. A method for producing the porous polymeric separator is also provided. CONSTITUTION: The lithium secondary battery comprises a porous separator based on a polyolefin grafted with a monomer having a polar group so as to increase the surface energy. The monomer is selected from the group consisting of acrylic acid, vinyl acetate, methyl methacrylate, glycidyl methacrylate and sodium styrene sulfate. Additionally, the method for producing the porous polymeric separator comprises the steps of: irradiating a polyolefin-based porous separator material with electron beams to generate radicals; mixing a monomer having a polar group with the porous separator in an organic solvent and carrying out a substitution reaction under nitrogen gas; carrying out a copolymerization reaction; and washing the reactants to remove unreacted monomers and homopolymers.

Abstract translation: 目的：提供具有优异的使用寿命和高容量的锂二次电池，其包括能够防止电解液泄漏的表面改性多孔聚合物隔膜。 还提供了一种生产多孔聚合物分离器的方法。 构成：锂二次电池包括基于接枝有具有极性基团的单体的聚烯烃的多孔隔板，以增加表面能。 单体选自丙烯酸，乙酸乙烯酯，甲基丙烯酸甲酯，甲基丙烯酸缩水甘油酯和苯乙烯硫酸钠。 另外，制造多孔聚合物分离器的方法包括以下步骤：用电子束照射聚烯烃基多孔隔板材料以产生自由基; 将具有极性基团的单体与多孔隔膜混合在有机溶剂中，并在氮气下进行取代反应; 进行共聚反应; 并洗涤反应物以除去未反应的单体和均聚物。