A kind of surface treatment method of garnet type solid electrolyte
A solid electrolyte, garnet-type technology, applied in electrolytes, non-aqueous electrolyte batteries, circuits, etc., can solve the problems of impurity layer formation, achieve good dispersion, enhance interface compatibility, and small powder particles
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Embodiment 1
[0039] A surface treatment method of LLZO, comprising the steps:
[0040] (1) Preparation of ion-conducting polymer solution: dissolving polyoxyethylene-based polymer PEO and lithium bistrifluoromethylimide in acetonitrile, and preparing an ion-conducting polymer solution with a concentration of 1%;
[0041] (2) Pretreatment: The LLZO powder material with a particle size of 0.1 μm is treated at a high temperature of 500 °C for 2 hours in an argon atmosphere to obtain a pure LLZO powder with no impurities on the surface;
[0042] (3) Slurry preparation: Calculate and weigh the amount of pretreated LLZO powder material and ion-conducting polymer solution according to the coating thickness of 1nm, and add the pre-treated LLZO powder to the ion-conducting polymer solution In the process of ultrasonic dispersion, a uniform slurry is obtained;
[0043] (4) Finished product preparation: use a closed centrifugal spray dryer to dry the slurry, and form an ion-conducting polymer coatin...
Embodiment 2
[0046] A surface treatment method of LLZTO, comprising the steps:
[0047] (1) Preparation of ion-conducting polymer solution: dissolving polyoxyethylene-based polymer PEO and lithium bisfluorosulfonimide in acetone, and preparing an ion-conducting polymer solution with a concentration of 2%;
[0048] (2) Pretreatment: ① Treat the LLZTO powder material with a particle size of 10 μm at a high temperature of 1500 °C for 2 hours in an argon atmosphere to obtain a pure LLZTO powder with no impurities on the surface;
[0049] (3) Slurry preparation: Calculate and weigh the amount of pretreated LLZTO powder material and ion-conducting polymer solution according to the coating thickness of 50nm, and add the pre-treated LLZTO powder to the ion-conducting polymer solution In, the slurry is stirred uniformly;
[0050] (4) Finished product preparation: use a closed centrifugal spray dryer to dry the slurry, and form an ion-conductive polymer coating layer with a thickness of 50nm on the...
Embodiment 3
[0053] A surface treatment method of LLGNZO, comprising the steps:
[0054] (1) Preparation of ion-conducting polymer solution: dissolving polysiloxane-based polymer PDMS and lithium perchlorate in ethanol, and preparing an ion-conducting polymer solution with a concentration of 1.5%;
[0055] (2) Pretreatment: The LLGNZO powder material with a particle size of 1 μm is subjected to a high temperature treatment at 1000°C for 2 hours in an argon atmosphere to obtain a pure LLGNZO powder with no impurities on the surface;
[0056] (3) Slurry preparation: Calculate and weigh the amount of pretreated LLGNZO powder material and ion-conducting polymer solution according to the thickness of the coating layer of 20nm, and add the pre-treated LLGNZO powder to the ion-conducting polymer solution In the process of ball milling, a uniform slurry is obtained;
[0057] (4) Finished product preparation: Dry the slurry with a closed centrifugal spray dryer, and form an ion-conducting polymer ...
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