Method for preparing UIO-66-NH2 cross-linked bacterial cellulose lithium ion battery diaphragm

The invention relates to a method for preparing a UIO-66-NH2 cross-linked bacterial cellulose lithium ion battery diaphragm. The method comprises the following steps: stirring a bacterial cellulose solution and epoxy chloropropane at 60-80 DEG C for 3-5 hours, then adding a UIO-66-NH2 solution, continuously stirring for 3-5 hours, and then carrying out vacuum drying at 80 DEG C for 12-18 hours, thereby obtaining the BC/UIO-66-NH2 composite diaphragm. According to the obtained uniform and porous BC/UIO-66-NH2 composite diaphragm, the diaphragm has thermal stability and good wettability to electrolyte through combination of the two materials, and the electrochemical performance of a battery is improved when the composite porous diaphragm is used as a lithium ion battery diaphragm. 本发明为一种UIO-66-NH2交联细菌纤维素锂离子电池隔膜的方法。该方法包括如下步骤：将细菌纤维素溶液与环氧氯丙烷在60-80℃下搅拌3-5h，然后加入UIO-66-NH2溶液，继续搅拌3-5h，再在80℃真空干燥12-18h，即可得到BC/UIO-66-NH2复合隔膜。本发明得到的均匀多孔的BC/UIO-66-NH2复合隔膜，两种材料的结合使隔膜兼具热稳定性和对电解液的良好浸润性，将此复合多孔膜用作锂离子电池隔膜，提高了电池的电化学性能。