Preparation and properties of UHMWPE microporous membrane for lithium ion battery diaphragm

[摘要] Based on the principle of heat - induced phase separation (TIPS).The ultrahigh molecular weight polyethylene (UHMWPE) microporous membrane was prepared. The effects of material formula and preparation process on the structure and properties of UHMWPE microporous membrane and the internal relationship between the process parameters and the performance of microporous membrane were studied. The forming process of microporous membrane was optimized and the UHMWPE microporous membranes with different properties were prepared and assembled into the half-battery and the full battery. The key electrochemical properties of lithium ion batteries, such as ion conductivity and cycle performance, were tested. The properties of lithium ion battery was explored. Results shown that the UHMWPE microporous membrane met the requirements of power lithium ion battery.

[发布机构] Beijing University of Chemical Technology, Beijing; 100029, China^1

[效力级别] 材料科学

[关键词] Effects of materials;Internal relationships;Ion conductivities;Micro porous membranes;Power lithium ion batteries;Preparation process;Process parameters;Structure and properties