A kind of environment-friendly lithium-ion battery diaphragm and preparation method thereof
A lithium-ion battery, environmentally friendly technology, applied in battery pack components, chemical instruments and methods, circuits, etc., can solve problems such as environmental pollution, and achieve the effects of solving environmental pollution problems, facilitating product process control, and reducing production costs.
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Embodiment 1
[0032] 1) Electrospinning solution preparation: PVA was dissolved in deionized water, the PVA mass volume ratio concentration was 5wt%, and the viscosity of the PVA solution was measured to be 100mPa.S.
[0033] 2) Electrospinning: The prepared PVA solution electrospinning solution is passed through a nanofiber spinning machine to carry out single-sided continuous electrospinning on a PET non-woven fabric substrate to obtain a PVA / PET nanofiber composite film. The spinning conditions are: temperature 10°C, positive voltage 20kV, negative voltage 20kV, spinning speed 1g per minute per meter width;
[0034] The composite membrane obtained after the spinning was finished was subjected to post-processing: it was formed by hot pressing with a roller at 80° C., and then dried in an oven at 120° C. for 1 minute.
[0035] Electron micrographs of the surface of unmodified non-woven fabric samples are as follows: figure 1 As shown, the electron micrographs of the surface of the sample ...
Embodiment 2
[0039] 1) Electrospinning solution preparation: PEO was dissolved in deionized water, the mass volume ratio concentration of PVA was 30wt%, and the viscosity of the PVA solution was measured to be 3000mPa.S.
[0040] 2) Electrospinning: The prepared PEO solution electrospinning solution is carried out double-sided continuous electrospinning on the PET non-woven fabric substrate through a nanofiber spinning machine to obtain a PI / PET nanofiber composite film. The spinning conditions are: temperature 40°C, positive voltage 20, negative voltage 30kV, spinning speed 10g per minute per meter width;
[0041]The composite membrane obtained after the spinning is completed is subjected to post-treatment: first, it is formed by hot pressing with a roller at 200° C., and then dried in an oven at 120° C. for 5 minutes.
[0042] 3) Preparation of polymer porous coating by phase transfer method: PVDF-HFP (Arkema, France, LBG) was mixed with acetone as a solvent and n-butanol as a non-solven...
Embodiment 3
[0044] 1) Preparation of electrospinning solution: PEG was dissolved in distilled water, the mass volume concentration of PVA was 10 wt%, and the viscosity of the PVG solution was measured to be 1000 mPa.S.
[0045] 2) Electrospinning: the prepared PEG solution electrospinning solution is passed through a nanofiber spinning machine to carry out single-sided continuous electrospinning on a PP non-woven fabric substrate to obtain a PEG / PP nanofiber composite film. The spinning conditions are: temperature 30°C, positive voltage 50kV, negative voltage 5kV, spinning speed 5g per minute per meter width;
[0046] The composite membrane obtained after the spinning is completed is subjected to post-processing: first, it is formed by hot pressing with a roller at 100° C., and then dried in an oven at 120° C. for 4 minutes.
[0047] 3) Preparation of polymer porous coating by phase transfer method: PVDF-HFP (Arkema, LBG, France) is mixed with solvent acetone, non-solvent n-butanol, and n...
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