Preparation method and application of boron nitride/polyoxyethylene composite solid electrolyte
A solid electrolyte, polyethylene oxide technology, applied in circuits, electrical components, secondary batteries, etc., can solve the problem of not using lithium metal batteries, and achieve the effect of uniform solid electrolyte membrane, mild conditions, and good encapsulation.
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Example Embodiment
[0028] Example 1
[0029] The preparation method of the present embodiment comprises the following steps:
[0030] (1) put the nano-boron nitride of 0.6g into a 500mL round-bottomed flask, add 200mL of acetonitrile to it, put it into an ultrasonic cleaner, the power is 40W, and ultrasonically, the time is 6 hours, to obtain a boron nitride-acetonitrile dispersion liquid , add 10g polyethylene oxide (abbreviation: PEO) into the dispersion liquid, stir magnetically for 1 hour to become a well-mixed emulsion; nano-boron nitride is a nano-sheet with a diameter of 50-1000nm and a thickness of 10-100nm;
[0031] (2) to the mixed emulsion of step 1, add 1g lithium bis-trifluoromethanesulfonimide (abbreviation: LiTFSI), and stir with a magnetic stirrer for 1 hour to obtain a mixed solution;
[0032] (3) Slowly pour the mixture obtained in step 2 into a polytetrafluoroethylene mold, place it in a fume hood, and wait for the acetonitrile to evaporate to form a polymer solid electrolyte...
Example Embodiment
[0038] Embodiment 2
[0039] The preparation method of the present embodiment comprises the following steps:
[0040] (1) put the nano-boron nitride of 0.3g into a 500mL round-bottomed flask, add 300mL of acetonitrile to it, put it into an ultrasonic cleaner, the power is 40W, and ultrasonically, the time is 1 hour, to obtain a boron nitride-acetonitrile dispersion liquid , add 10g polyethylene oxide (abbreviation: PEO) into the dispersion liquid, stir magnetically for 1 hour to become a well-mixed emulsion; nano-boron nitride is a nano-sheet with a diameter of 50-1000nm and a thickness of 10-100nm;
[0041] (2) adding 0.7g lithium bis-trifluoromethanesulfonimide (abbreviation: LiTFSI) to the mixed emulsion of step 1, and stirring with a magnetic stirrer for 1 hour to obtain a mixed solution;
[0042] (3) Slowly pour the mixture obtained in step 2 into a polytetrafluoroethylene mold, place it in a fume hood, and wait for the acetonitrile to evaporate to form a polymer solid e...
Example Embodiment
[0045] Embodiment 3
[0046] The preparation method of the present embodiment comprises the following steps:
[0047] (1) put the nano-boron nitride of 0.9g into a 500mL round-bottomed flask, add 250mL of methanol to it, put into an ultrasonic cleaner, the power is 40W, carry out ultrasonic, and the time is 3 hours to obtain a boron nitride-acetonitrile dispersion , adding 10g of polyethylene oxide (PEO) into the dispersion, magnetic stirring for 1 hour to form a uniformly mixed emulsion; nano-boron nitride is an array of boron nitride with a diameter range of 10-30 μm and a thickness of 0.1-1 μm;
[0048] (2) adding 1.5g lithium bis-trifluoromethanesulfonimide (abbreviation: LiTFSI) to the mixed emulsion of step 1, and stirring with a magnetic stirrer for 1 hour to obtain a mixed solution;
[0049] (3) Slowly pour the mixture obtained in step 2 into a polytetrafluoroethylene mold, place it in a fume hood, and wait for methanol to evaporate to form a polymer solid electrolyte...
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