Process method for preparing lithium battery diaphragm by using 3D printing technology

[0041] Step 1, mix the PP diaphragm base material, ultrafine alumina powder, and PVDF in the mixer according to the ratio of 7:2:1, transfer the evenly mixed material to the drum dry grinder, and grind to Mixed material powder with a particle size of 30 μm.

[0042] Step 2, transfer the mixed material powder obtained in step 1 to a heater with stirring, heat to 180°C to melt the material, then add NMP to adjust the viscosity of the material to 80000mPa.s, so that the material has a certain fluidity, and fully stir for 3 hours . Get the materials to be printed.

[0043] Step 3, transfer the melted material to be printed to the material injector of the 3D printer, and the nozzle arrangement width of the 3D printer is 1.5m.

[0044] The thickness of the diaphragm, the shape and diameter of the channel, the diameter of the membrane line, and the printing speed are set through the computer of the printer. After starting the printing, push the plunger of the syringe so that the mate

[0046] Step 1, mix the PE diaphragm base material, ultrafine alumina powder, and PVDF in the mixer according to the ratio of 7:2:1, transfer the evenly mixed material to the drum dry grinder, and grind to Mixed material powder with a particle size of 30 μm.

[0047] Step 2, transfer the mixed material powder obtained in step 1 to a heater with stirring, heat to 175°C to melt the material, then add NMP to adjust the viscosity of the material to 80000mPa.s, so that the material has a certain fluidity, and fully stir for 3 hours . Get the materials to be printed.

[0048] Step 3, transfer the melted material to be printed to the material injector of the 3D printer, and the nozzle arrangement width of the 3D printer is 1.5m.

[0049] The thickness of the diaphragm, the shape and diameter of the channel, the diameter of the membrane line, and the printing speed are set through the computer of the printer. After starting the printing, push the plunger of the syringe so that the mate

[0051] Step 1. Mix polypropylene non-woven diaphragm base material, ultrafine alumina powder, and PVDF in a mixer in a ratio of 7:2:1, and transfer the evenly mixed material to a drum-type dry grinder , grind to a mixed material powder with a particle size of 30 μm.

[0052] Step 2, transfer the mixed material powder obtained in step 1 to a heater with stirring, heat to 175°C to melt the material, then add NMP to adjust the viscosity of the material to 80000mPa.s, so that the material has a certain fluidity, and fully stir for 3 hours . Get the materials to be printed.

[0053] Step 3, transfer the melted material to be printed to the material injector of the 3D printer, and the nozzle arrangement width of the 3D printer is 1.5m.

[0054] The thickness of the diaphragm, the shape and diameter of the channel, the diameter of the membrane line, and the printing speed are set through the computer of the printer. After starting the printing, push the plunger of the syringe so that