Sulfonated aromatic polyamide binder, preparation method thereof and lithium-sulfur battery positive plate
A technology of sulfonated aromatic polyamide and aromatic polyamide, which is applied in the field of lithium-sulfur battery positive electrode sheet, sulfonated aromatic polyamide binder and preparation thereof, and can solve the problem of poor improvement effect, polar sheet components and current collectors. The problem of low bonding performance, to avoid the shuttle effect, good bonding performance, and improve solubility
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Embodiment 1
[0031] A preparation method of sulfonated aromatic polyamide binder, comprising the steps of:
[0032] In a nitrogen atmosphere, mix 0.4g calcium chloride, 0.2g lithium chloride, 2ml pyridine, and 20ml N-methylpyrrolidone, heat and stir until dissolved, cool to room temperature, then add 4mmol isophthalic acid, 4mmol4,4 Mix '-diaminodiphenyl ether-2,2'-disulfonic acid, 2.2ml triphenyl phosphite, and 1.75ml triethylamine, then stir at 70°C for 3h, then stir at 90°C for 13.5h , then stirred and reacted at 115°C for 10h, then cooled to room temperature, slowly poured into methanol, soaked for 12h, filtered, soaked in deionized water for 12h, filtered, and vacuum-dried to obtain a sulfonated aromatic polyamide binder.
[0033] The structural formula of embodiment 1 gained binder is as follows:
[0034]
Embodiment 2
[0036] A preparation method of sulfonated aromatic polyamide binder, comprising the steps of:
[0037] In a nitrogen atmosphere, mix 0.4g calcium chloride, 0.1g lithium chloride, 1.9ml pyridine, and 20ml N-methylpyrrolidone, heat and stir until dissolved, cool to room temperature, then add 4mmol isophthalic acid, 4.4mmol Mix 4,4'-diamino-2,2'-biphenyldisulfonic acid, 2.0ml triphenyl phosphite, and 1.6ml triethylamine, then stir and keep warm at 75°C for 2.5h, then stir at 95°C React for 12.5 hours, then stir and react at 120°C for 9 hours, then cool to room temperature, slowly pour into methanol, soak for 12 hours, filter, soak in deionized water for 12 hours, filter, and vacuum dry to obtain a sulfonated aromatic polyamide binder.
[0038] The structural formula of embodiment 2 gained binding agent is as follows:
[0039]
Embodiment 3
[0041] A preparation method of sulfonated aromatic polyamide binder, comprising the steps of:
[0042] In a nitrogen atmosphere, mix 0.45g calcium chloride, 0.15g lithium chloride, 2.1ml pyridine, and 20ml N-methylpyrrolidone, heat and stir until dissolved, cool to room temperature, and then add 4mmol 1,3-bis(4 -carboxyphenoxy)benzene, 4.2mmol 4,4'-diaminodiphenyl ether-2,2'-disulfonic acid, 2.4ml triphenyl phosphite, 1.9ml triethylamine, mix well, then stir at 72°C Insulated for 2.8 hours, then stirred at 92°C for 13 hours, then stirred at 117°C for 9.5 hours, then cooled to room temperature, slowly poured into methanol, soaked for 12 hours, filtered, soaked in deionized water for 12 hours, filtered, and vacuum dried A sulfonated aromatic polyamide binder is obtained.
[0043] The structural formula of embodiment 3 gained binder is as follows:
[0044]
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Abstract
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