Asymmetric gel polymer electrolyte as well as preparation method and application thereof
A gel polymer, asymmetric technology, applied in circuits, electrical components, secondary batteries, etc., can solve the problems of negative lithium dendrite growth, positive electrode instability, etc., achieve high ion conductivity and ion migration number, reduce The effect of dissolution and mechanical properties improvement
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Embodiment 1
[0022] (1) preparing a Tris buffer solution with a pH of 7.5;
[0023] (2) Disperse 0.45g BTO into 100ml Tris buffer solution, add 0.02g DA·HCl after the dispersion is uniform, react for 3h, centrifuge and wash 3 times with deionized water, disperse the precipitate in ethanol, and vacuum filter to obtain The product was dried at room temperature and then ground to obtain a PDA@BTO with a coating thickness of about 4 nm;
[0024] (3) Ultrasonic disperse BTO and PDA@BTO accounting for 1.36wt% of the solvent into DMF / acetone (v:v, 1:1) mixed solvent respectively, and add PVDF- For HFP, stir magnetically in a water bath at 45°C for 12 hours to completely dissolve PVDF-HFP to obtain two spinning solutions;
[0025] (4) Asymmetric porous nanofibrous membranes are prepared by continuous electrospinning. One layer of the fiber membranes contains BTO, and the other layer contains PDA@BTO. The fiber membranes are vacuum-dried to remove excess solvent;
[0026] (5) The dried asymmetric...
Embodiment 2
[0029] (1) preparation of pH is the Tris buffer solution of 8.5;
[0030] (2) Disperse 0.55g BTO into 100ml Tris buffer solution, add 0.05g DA·HCl after dispersing evenly, react for 2.5h, centrifuge and wash 3 times with deionized water, disperse the precipitate in ethanol, and vacuum filter to obtain The product was dried at room temperature and then ground to obtain a PDA@BTO with a coating thickness of about 5 nm;
[0031] (3) Ultrasonic disperse BTO and PDA@BTO accounting for 2.4wt% of the solvent into DMF / acetone (v:v, 1:1) mixed solvent respectively, and add PVDF- For HFP, stir magnetically in a water bath at 45°C for 12 hours to completely dissolve PVDF-HFP to obtain two spinning solutions;
[0032](4) Asymmetric porous nanofibrous membranes are prepared by continuous electrospinning. One layer of the fiber membranes contains BTO, and the other layer contains PDA@BTO. The fiber membranes are vacuum-dried to remove excess solvent;
[0033] (5) The dried asymmetric fibe...
Embodiment 3
[0036] (1) Tris buffer that the preparation pH is 9;
[0037] (2) Disperse 0.5g BTO into 100ml Tris buffer, add 0.03g DA·HCl after dispersing evenly, react for 2h, centrifuge and wash 3 times with deionized water, disperse the precipitate in ethanol, and vacuum filter to obtain The product was dried at room temperature and then ground to obtain a PDA@BTO with a coating thickness of about 4 nm;
[0038] (3) Ultrasonic disperse BTO and PDA@BTO accounting for 1.8wt% of the solvent into DMF / acetone (v:v, 1:1) mixed solvent respectively, and add PVDF- For HFP, stir magnetically in a water bath at 45°C for 12 hours to completely dissolve PVDF-HFP to obtain two spinning solutions;
[0039] (4) Asymmetric porous nanofibrous membranes are prepared by continuous electrospinning. One layer of the fiber membranes contains BTO, and the other layer contains PDA@BTO. The fiber membranes are vacuum-dried to remove excess solvent;
[0040] (5) The dried asymmetric fiber membrane was cut into...
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