CAJ | 학술논문

首先合成了甲基丙烯酸甲酯（MMA）与甲基丙烯酸-N,N-二甲胺乙酯的共聚物P（MMA-co-DMAE-MA）,与聚偏氟乙烯（PVDF）共混经溶液相转化法制备了PVDF/P（MMA-co-DMAEMA）隔膜。研究发现,相对于纯PVDF隔膜,共混隔膜的孔隙率增加,结晶度降低,电解液吸收稳定性显著提高。共混隔膜具有＂活性＂隔膜的性质,隔膜-电解液组成的电解质体系表现出凝胶电解质特征,隔膜中PVDF/P（MMA-co-DMAE-MA）质量比为10/1时,隔膜吸液率在420%以上,活化后凝胶电解质膜离子电导率可达到1.8×10-3S/cm。研究结果表明,采用溶液相转化法制备PVDF/P（MMA-co-DMAEMA）共混隔膜,是一种制备凝胶锂离子电池用高性能活性隔膜的有效方法。
수선합성료갑기병희산갑지（MMA）여갑기병희산-N,N-이갑알을지적공취물P（MMA-co-DMAE-MA）,여취편불을희（PVDF）공혼경용액상전화법제비료PVDF/P（MMA-co-DMAEMA）격막。연구발현,상대우순PVDF격막,공혼격막적공극솔증가,결정도강저,전해액흡수은정성현저제고。공혼격막구유＂활성＂격막적성질,격막-전해액조성적전해질체계표현출응효전해질특정,격막중PVDF/P（MMA-co-DMAE-MA）질량비위10/1시,격막흡액솔재420%이상,활화후응효전해질막리자전도솔가체도1.8×10-3S/cm。연구결과표명,채용용액상전화법제비PVDF/P（MMA-co-DMAEMA）공혼격막,시일충제비응효리리자전지용고성능활성격막적유효방법。
Lithium ion conducting membranes based on porous separators are the key materials for high performance lithium ion batteries.The amphiphilic copolymers of poly（methyl methacrylate-co-dimethylaminoethyl methacrylate）（P（MMA-co-DMAEMA）） were synthesized through a conventional radical polymerization.Using these copolymers as additives in casting solutions,the PVDF/P（MMA-co-DMAEMA） porous blend membranes were prepared following a typical non-solvent induced phase separation（NIPS） process.Compared with pure PVDF separator with comparable porous structure,the adoption of P（MMA-co-DMAEMA） could not only decrease the crystallinity,but also enhance the stability of entrapped liquid electrolyte.Such modified PVDF membrane should be named as ＂active separator＂,which can exhibit the characteristic of gel electrolyte by absorbing lithium salt liquid electrolyte.For separators with PVDF/P（MMA-co-DMAEMA） mass ratio in 10∶1,the liquid electrolyte uptake reached above 420wt% and ion conductivity of the membrane was 1.8× 10-3S/cm,which was acceptable for high voltage lithium ion batteries.These results primarily indicate the potential of the prepared blend separator in real application in safe and high performance lithium ion batteries.