Sulfonated polyamide binder for lithium-sulfur battery and positive plate
A technology for sulfonated polyamide and lithium-sulfur batteries, which is applied in the directions of battery electrodes, lithium batteries, and non-aqueous electrolyte battery electrodes, etc., and can solve the problem of poor bonding performance between pole piece components and current collectors, and poor volume change improvement effect Good and other problems, to achieve the effect of avoiding the shuttle effect, suitable flexibility, and inhibiting volume expansion
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Embodiment 1
[0026] A kind of sulfonated polyamide binder for lithium-sulfur battery, its preparation method comprises the steps:
[0027] In a nitrogen atmosphere, mix 0.25g calcium chloride, 0.1g lithium chloride, 1ml pyridine, and 10ml N-methylpyrrolidone, heat and stir until dissolved, cool to room temperature, and then add 0.8mmol 2,6-naphthalene dicarboxylate Acid, 1.2mmol adipic acid, 2.06mmol 4,4'-diaminodiphenyl ether-2,2'-disulfonic acid, 1.1ml triphenyl phosphite, 0.9ml triethylamine and mix well, then at 80℃ Stir and hold for 2 hours, then stir and react at 100°C for 12 hours, then stir and react at 110°C for 12 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 Sulfonated polyamide binders for lithium-sulfur batteries.
[0028] The structural formula of embodiment 1 gained binder is as follows:
[0029]
Embodiment 2
[0031] A kind of sulfonated polyamide binder for lithium-sulfur battery, its preparation method comprises the steps:
[0032] In a nitrogen atmosphere, mix 0.25g calcium chloride, 0.1g lithium chloride, 1ml pyridine, and 10ml N-methylpyrrolidone, heat and stir until dissolved, cool to room temperature, and then add 0.75mmol 2,6-naphthalene dicarboxylate Acid, 1.25mmol glutaric acid, 2mmol 4,4'-diaminodiphenyl ether-2,2'-disulfonic acid, 1.1ml triphenyl phosphite, 0.9ml triethylamine, mix well, then stir at 80°C Insulated reaction for 2 hours, then stirred at 100°C for 12 hours, then stirred at 110°C for 12 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 to obtain lithium Sulfonated polyamide binder for sulfur batteries.
[0033] The structural formula of embodiment 2 gained binding agent is as follows:
[0034]
Embodiment 3
[0036] A kind of sulfonated polyamide binder for lithium-sulfur battery, its preparation method comprises the steps:
[0037] In a nitrogen atmosphere, mix 0.25g calcium chloride, 0.1g lithium chloride, 1ml pyridine, and 10ml N-methylpyrrolidone, heat and stir until dissolved, cool to room temperature, and then add 0.85mmol 2,6-naphthalene dicarboxylate Acid, 1.15mmol sebacic acid, 2mmol 4,4'-diaminodiphenyl ether-2,2'-disulfonic acid, 1.1ml triphenyl phosphite, 0.9ml triethylamine, mix well, then stir at 80°C Insulated reaction for 2 hours, then stirred at 100°C for 12 hours, then stirred at 110°C for 12 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 to obtain lithium Sulfonated polyamide binder for sulfur batteries.
[0038] The structural formula of embodiment 3 gained binder is as follows:
[0039]
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