Gel polymer electrolyte and preparation method thereof
A gel polymer and electrolyte technology, applied in the direction of electrolyte immobilization/gelation, circuits, electrical components, etc., can solve problems such as potential safety hazards of liquid electrolytes, and achieve simple and fast preparation methods, solve potential safety hazards, and low cost sexual effect
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[0020] The preparation process of the gel polymer electrolyte of the present invention is roughly divided into the following steps.
[0021] (a) Preparation of SiO 2 / PVC composite polymer microporous membrane: Dissolve polyvinyl chloride (English abbreviation PVC, molecular weight 60,000) in an organic solvent and stir evenly, then add tetraethyl orthosilicate and ammonia water, heat up to 40-60°C and hydrolyze to obtain SiO 2 The obtained slurry was evenly coated on a clean glass plate, placed at room temperature for 10-120 min, and then placed in a water tank to remove the organic solvent to obtain a wet film with a thickness of 80-120 μm. Vacuum drying at 60 °C and 0.01 MPa to obtain SiO with a thickness of 50-80 μm 2 / PVC composite polymer microporous membrane.
[0022] (b) Preparation of composite SiO 2 PVC-based gel polymer electrolyte: SiO 2 / PVC composite polymer microporous membrane in an inert gas atmosphere glove box, and immerse it in the electrolyte (LiPF ...
Embodiment 1
[0028] Example 1: (a) Preparation of SiO 2 / PVC composite polymer microporous membrane:
[0029] Dissolve 10 g of PVC (molecular weight: 60,000) in 80 g of NMP (N-methylpyrrolidone) and stir evenly, then add 5 g of tetraethyl orthosilicate and 6 g of ammonia water, and heat up to 50 °C for hydrolysis to obtain SiO 2 uniform slurry, the obtained slurry was evenly coated on a clean glass plate, placed at room temperature for 10 minutes, and then placed in a water tank to remove the organic solvent to obtain a wet film with a thickness of 100 μm. dried under vacuum to obtain a composite SiO with a thickness of 70 μm 2 PVC microporous membrane.
[0030] (b) Preparation of PVC-based gel polymer electrolyte composited with SiO2: put the dried PVC microporous membrane into an argon-filled glove box, and immerse it in 1 mol / L LiPF6 / EC+DMC (representing EC Mixed solvent with DMC, the volume ratio is 1:1) in the electrolyte solution for 5 minutes, and the PVC-based gel polymer ele...
Embodiment 2
[0031] Example 2: (a) Preparation of SiO 2 / PVC composite polymer microporous membrane: Dissolve 10 g PVC (molecular weight 60,000) in 85 g DMF (N,N-dimethylformamide) and stir evenly, then add 6 g tetraethyl orthosilicate and 6 g Ammonia, and heated to 40 ℃ for hydrolysis, obtained containing SiO 2 uniform slurry, the obtained slurry was evenly coated on a clean glass plate, placed at room temperature for 30min, and then placed in a water tank to remove the organic solvent to obtain a wet film with a thickness of 80 μm, and then heated at 60 °C, 0.01 MPa dried under vacuum to obtain a composite SiO with a thickness of 50 μm 2 PVC microporous membrane.
[0032] (b) Preparation of PVC-based gel polymer electrolyte composited with SiO2: put the dried PVC microporous membrane into a neon-filled glove box, and immerse it in 0.5mol / L LiPF6 / EC+DMC (representing EC Mixed solvent with DMC (volume ratio 1:2) in the electrolyte for 30 minutes, and after taking it out, a PVC-based...
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