SBA-15/纤维素复合隔膜的制备及对锂离子电池性能的影响  

Preparation of SBA-15/Cellulose Composite Separator and Its Effect on Performance of Lithium Ion Battery

作　　者：张佳锦 吴桐 林铭 罗晓刚 ZHANG Jiajin;WU Tong;LIN Ming;LUO Xiaogang(Key Laboratory for Green Chemical Process of Ministry of Education,Hubei Key Laboratory of Novel Reactor and Green Chemical Technology,School of Chemical Engineering and Pharmacy,Wuhan Institute of Technology,Wuhan 430205,China;Hubei Three Gorges Laboratory,Yichang 443008,China)

机构地区：[1]武汉工程大学化工与制药学院,绿色化工过程教育部重点实验室,新型反应器与绿色化学工艺湖北省重点实验室,湖北武汉430205 [2]湖北三峡实验室,湖北宜昌443008

出　　处：《化学与生物工程》2024年第1期28-32,共5页Chemistry & Bioengineering

基　　金：国家自然科学基金项目(51773159);湖北省高等学校优秀中青年科技创新团队计划项目(T201908);中央指导湖北省地方科技发展专项(2020ZYYD040);第二批湖北省重点研发计划项目(2020BAB073)。

摘　　要：以高纯度的纤维素为原料,利用纤维素膜对电解质良好的润湿性,共混引入SBA-15纳米粒子,制备了SBA-15/纤维素复合隔膜,通过场发射扫描电子显微镜对其形貌进行了表征,并研究了其热收缩性能、润湿性能及电化学性能。结果表明,SBA-15纳米粒子的加入不仅有助于提高隔膜的热稳定性,而且可以促进液体电解质的吸收,从而允许均匀分配锂离子通量;与聚丙烯(PP)隔膜电池相比,SBA-15/纤维素复合隔膜电池在0.5 C下循环100次后仍能保持143.6 mAh·g^(-1)的放电比容量。该研究为制备高安全的锂离子电池提供了借鉴。We prepared SBA-15/cellulose composite separator by blending SBA-15 nanoparticles with high purity cellulose,which has good wettability to the electrolyte.Meanwhile,we characterized the morphology of SBA-15/cellulose composite separator by field emission scanning electron microscopy,and investigated the thermal shrinkage,wettability,and electrochemical performances.The results show that the addition of SBA-15 nanoparticles can not only improve the thermal stability of the separator,but also promote the absorption of liquid electrolyte,thus allowing uniform distribution of Li+flux.Compared with battery with polypropylene(PP)separator,battery with SBA-15/cellulose composite separator can still maintain a discharge specific capacity of 143.6 mAh·g^(-1)at 0.5 C after 100 cycles.This study provides a reference for the preparation of high safety lithium ion batteries.

关 键 词：锂离子电池 隔膜 纤维素 SBA-15 

分 类 号：TQ352.4[化学工程] O646[理学—物理化学]