Intrinsic flame-retardant polyurethane solid electrolyte membrane
A solid electrolyte membrane and intrinsic flame retardant technology, which is applied in the field of lithium-ion batteries, can solve the problems of fast heat release and large smoke generation
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Embodiment 1
[0045] 1. Add 4.0g of ethylene glycol methyl propionate and 3.58g of hexamethylene diisocyanate after vacuum dehydration and drying into a three-necked flask, and stir and react at 85°C for 3h Add 6.0 g of dried PEG1000, 3 drops of dibutyltin dilaurate and 3 drops of stannous octoate, and continue to stir and react at 85°C for 1.5 h. During the reaction, use N, N-dimethylformamide to control the viscosity of the system, and then Pour the obtained viscous liquid into a polytetrafluoroethylene mold, place the mold in a vacuum oven at 100°C for 8 hours, and then remove the mold to obtain intrinsic flame-retardant polyurethane. The above operations are all carried out in a nitrogen atmosphere;
[0046] The intrinsic flame retardant polyurethane prepared in this embodiment is carried out infrared spectrum analysis, and the infrared spectrum figure of gained is as follows figure 1 As shown, figure 1 Middle, peak 1 (3341cm -1 ) is the stretching vibration peak of N-H in the intrins...
Embodiment 2
[0049]1. Add 4.0g of ethylene glycol methyl propionate and 3.58g of hexamethylene diisocyanate after vacuum dehydration and drying into a three-necked flask, and stir and react at 85°C for 3h Add 6.0 g of dried PEG1000, 3 drops of dibutyltin dilaurate and 3 drops of stannous octoate, and continue to stir and react at 85°C for 1.5 h. During the reaction, use N, N-dimethylformamide to control the viscosity of the system, and then Pour the obtained viscous liquid into a polytetrafluoroethylene mold, place the mold in a vacuum oven at 100°C for 8 hours, and demould to obtain intrinsic flame-retardant polyurethane. The above operations are all carried out in a nitrogen atmosphere;
[0050] 2. Weigh 1.0g of the above synthesized intrinsic flame retardant polyurethane and 0.3g of lithium bistrifluoromethanesulfonimide and dissolve it in 25g of N,N-dimethylformamide to form a casting solution, pour the casting solution into In the polytetrafluoroethylene mold, place the polytetrafluor...
Embodiment 3
[0052] 1. Add 4.0g of ethylene glycol methyl propionate and 3.06g of hexamethylene diisocyanate after vacuum dehydration and drying into a three-necked flask, stir and react at 85°C for 3h, then add 6.0g of dried PEG2000, 3 drops of dibutyltin dilaurate and 3 drops of stannous octoate were stirred and reacted at 85°C for 1.5h. During the reaction, N, N-dimethylformamide was used to control the viscosity of the system, and then the The obtained viscous liquid was poured into a polytetrafluoroethylene mold, and the mold was placed in a vacuum oven at 100°C for 8 hours to cure, and demolded to obtain intrinsic flame-retardant polyurethane. The above operations were all carried out in a nitrogen atmosphere;
[0053] 2. Weigh 1.0g of the above synthesized intrinsic flame retardant polyurethane and 0.25g of lithium perchlorate and dissolve in 25g of N,N-dimethylformamide to form a casting solution, and pour the casting solution into a polytetrafluoroethylene mold , put the polytetra...
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