Heat-resistant Al_(2)O_(3) nanowire-polyetherimide separator for safer and faster lithium-ion batteries

作     者：Wenqiang Hu Wenbin Fu Samik Jhulki Liang Chen Aashray Narla Zhijian Sun Fujia Wang Alexandre Magasinski Gleb Yushin Wenqiang Hu;Wenbin Fu;Samik Jhulki;Liang Chen;Aashray Narla;Zhijian Sun;Fujia Wang;Alexandre Magasinski;Gleb Yushin

作者机构：School of Materials Science and EngineeringGeorgia Institute of TechnologyAtlantaGA 30332USA Institute of Materials Science and EngineeringSchool of Mechanical and Electronic Control EngineeringBeijing Jiaotong UniversityBeijing 100044China Sila Nanotechnologies IncAlamedaCA 94501USA School of Chemistry and Chemical EngineeringHunan Institute of Science and TechnologyYueyangHunan 414006China 

出 版 物：《Journal of Materials Science & Technology》 (材料科学技术（英文版）)

年 卷 期：2023年第142卷第11期

页      面：112-120页

核心收录：

学科分类：08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 0703[理学-化学] 

基　　金：financially supported by Sila Nanotechnologies,Inc.(Sila) additional fellowship support of China Scholarship Council supported by the National Science Foundation(No.ECCS-2025462) 

主　　题：Lithium-ion batteries Separators Al_(2)O_(3)NWs Polyetherimide Thermal resistance 

摘      要：Poor heat/flame-resistance of polyolefin(e.g.,polyethylene and polypropylene)separators and high flammability of organic electrolytes used in today’s lithium-ion batteries(LIBs)may trigger rare yet potentially catastrophic safety ***,we mitigate this challenge by developing a heat-resistant and flame-retardant porous composite membrane composed of polyetherimide(PEI)and Al_(2)O_(3) nanowires(NWs).The membranes are fabricated based on an industrially scalable non-solvent-induced phase separation process,which results in an intimately interconnected porous network of Al_(2)O_(3) NWs and *** produced composite membranes exhibit excellent flexibility,thermal stability,and ***,the composite membranes exhibit minimal thermal shrinkage and superior tensile strength(16 MPa)at temperatures as high as 200℃,significantly exceeding the performance of conventional polyolefin *** with commercial separators,their superior wettability and higher ionic conductivity(by up to 2.4 times)when filled with the same electrolyte,larger electrolyte uptake(-190 wt.%),as well as improved cycle and rate performance demonstrated in LiNiMnCoO_(2)(NCM)-based LIBs make them attractive choices for a variety of electrochemical energy storage devices.