All-solid-state polymer electrolyte, preparation method thereof, and all-solid-state lithium ion battery
An all-solid polymer and electrolyte technology, used in secondary batteries, circuits, electrical components, etc., can solve the problems of poor high voltage stability, low electrical conductivity, poor mechanical properties, etc., to prevent lithium metal powder and high electrical conductivity. , good compatibility
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[0048] Specifically, the preparation method includes the following steps:
[0049] Step S01. Dissolve at least one of aromatic diol and aromatic diamine, aromatic diacid chloride and polyethylene glycol in anhydrous organic solvent, add acid binding agent to it, and heat under inert atmosphere to polymerize Reaction to obtain a polymer; step S02. The polymer obtained in step S01 is dissolved in an organic solvent, and lithium salt is added thereto to obtain a mixed solution;
[0050] Step S03. Casting the mixed solution to form a membrane to obtain an all-solid polymer electrolyte.
[0051] Specifically, in the above step S01, the polymerization reaction needs to occur under anhydrous conditions, so the inorganic solvent can be subjected to water removal treatment, such as adding a desiccant to the inorganic solvent, such as adding calcium chloride or molecular sieve, to absorb the inorganic solvent Moisture, and then mix the raw materials.
[0052] Preferably, the anhydrous organic ...
Example Embodiment
[0069] Example 1
[0070] This embodiment 1 provides a method for preparing an all-solid polymer electrolyte.
[0071] The preparation method of the all-solid polymer electrolyte includes the following steps:
[0072] (1). Dissolve 0.02mol 2-phenylterephthaloyl chloride, 0.0164mol 2-phenylhydroquinone and 0.0036mol polyethylene glycol (PEG, molecular weight 2kg / mol) in 100mL anhydrous tetrahydrofuran, Add 0.04mol triethylamine (Et 3 N or TEA or NEt 3 ), react at 60℃ for 6h under nitrogen protection;
[0073] (2) The mixed solution after the reaction in step (1) was cooled to room temperature, filtered to remove triethylamine hydrochloride, 500 mL of ethanol was added to precipitate the product, filtered under reduced pressure, and the product was washed with ethanol for 3 times and then heated to 60 The fully aromatic polyester / PEG multi-block polymer was obtained by vacuum drying at ℃ for 24 hours. The molecular structure of the obtained multi-block polymer was characterized by infr...
Example Embodiment
[0075] Example 2
[0076] Embodiment 2 provides a method for preparing an all-solid polymer electrolyte.
[0077] The preparation method of the all-solid polymer electrolyte includes the following steps:
[0078] (1) Dissolve 0.02mol 2-phenylterephthaloyl chloride, 0.0187mol 2-phenylhydroquinone and 0.0013mol polyethylene glycol (PEG, molecular weight 6kg / mol) in 110mL dry tetrahydrofuran, add 0.04mol triethylamine (Et 3 N or TEA or NEt 3 ), react at 60℃ for 6h under nitrogen protection;
[0079] (2) Cool the reaction mixture solution in step (1) to room temperature, filter out the triethylamine hydrochloride, add 500 mL of ethanol to precipitate the product, filter under reduced pressure, wash the product with ethanol three times and vacuum at 60°C Dry for 24 hours to obtain a fully aromatic polyester / PEG multi-block polymer, and use infrared test to characterize the molecular structure of the obtained multi-block polymer. figure 1 As shown; at the same time it is characterized by N...
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