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Study on the modification of glutaric dialdehyde cross-linked cellulose/nylon6?lithium?battery?separator

Authors： SUN Wei1, LIU Xin, NING Ruxia, LIANG Jie, LI Xiang, WANG Aiai,SUN Zhonghua,

Units： College of Engineering, Qufu Normal University, Rizhao 276826, Shandong

KeyWords： Separator; Glutaric dialdehyde; Cellulose; PA6; Crosslinking

ClassificationCode：TQ352.7

year,volume(issue):pagination： 2021,41(3):52-58

Abstract：

Glutaric dialdehyde was used as crosslinking agent to modify the cellulose/nylon 6 lithium battery separator. The effects of glutaric dialdehyde concentration on the mechanical properties of the separators were investigated. The characteristics of modified separator were studied through the methods of SEM, FT-IR, thermogravimetric analysis, contact angle measurements and electrochemical characterization. The test results show that the excellent crosslinking conditions were: the crosslinking temperature was 75℃, the time was 60min respectively, and the concentration of glutaraldehyde was 6%. Under these conditions, the tensile strength of the separator was 75.42MPa, and the elongation at break was 28.96%. The electrolyte uptake was 235.5%, retention rate was 68.9% and porosity was 53.6%, respectively. The maximum thermal shrinkage stress was 1.42N and the thermal shrinkage rate was 1.8%. The electrochemical window rose to 4.9V. Meanwhile, the ion conductivity was 0.65×10-3 S/cm.

Funds：

山东省重点研发计划项目(项目编号：2019GSF109110)

AuthorIntro：

孙威（1998-），女，山东淄博人，曲阜师范大学硕士生，研究方向：新膜材料的开发与应用

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