Composite gel polymer electrolyte for lithium metal battery and its preparation and application
A lithium metal battery, composite gel technology, applied in lithium batteries, solid electrolytes, non-aqueous electrolytes, etc., can solve the problems of high solvent mobility and volatility, poor thermal stability, poor chemical and electrochemical stability, etc. The effect of excellent application performance
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Embodiment 1
[0043]Take 6.3g polyacrylonitrile (PAN) and dissolve it uniformly in 100mL propylene carbonate (PC) solvent, disperse by ultrasonic vibration for 0.5h, add 28.7g lithium bis(trifluoromethanesulfonyl)imide (LiTFSI, 1M), 3.15 g of azobisisobutyronitrile and 1.52 g of titanium nitride nanocrystals (with a particle size of 100 nm), were magnetically stirred at 25° C. for 6 h to obtain a homogeneous sol stable system as an electrospinning solution. The spinning voltage is 24kV, the distance between positive and negative electrodes is 10cm, the advancing speed of the syringe pump is 20μL / min, the inner diameter of the injection needle is 1mm, and the humidity is controlled to be less than 80%. Finally, the composite fiber formed by spinning was dried in a vacuum drying oven at 80° C. for 6 hours, and the obtained electrospun membrane was the composite gel polymer electrolyte.
Embodiment 2
[0045] Take 7.2g of polyethylene oxide and dissolve it uniformly in 100mL of propylene carbonate (PC) solvent, disperse it by ultrasonic vibration for 0.5h, add 28.7g of lithium bis(trifluoromethanesulfonyl)imide (LiTFSI), 3.6g of azo Diisobutyronitrile and 1.52 g of titanium nitride nanocrystals (with a particle size of 100 nm) were magnetically stirred at 25° C. for 6 h to obtain a homogeneous sol stable system as an electrospinning solution. The spinning voltage is 24kV, the distance between positive and negative electrodes is 10cm, the advancing speed of the syringe pump is 20μL / min, the inner diameter of the injection needle is 1mm, and the humidity is controlled to be less than 80%. Finally, the composite fiber formed by spinning was dried in a vacuum drying oven at 80° C. for 6 hours, and the obtained electrospun membrane was the composite gel polymer electrolyte.
Embodiment 3
[0047] Take 6.4g polyvinylidene fluoride (PVDF) and dissolve it uniformly in 100mL propylene carbonate (PC) solvent, disperse it by ultrasonic vibration for 0.5h, add 28.7g lithium bis(trifluoromethanesulfonyl)imide (LiTFSI), 3.2 g of azobisisobutyronitrile and 1.52 g of titanium nitride nanocrystals (with a particle size of 100 nm), were magnetically stirred at 25° C. for 6 h to obtain a homogeneous sol stable system as an electrospinning solution. The spinning voltage is 24kV, the distance between positive and negative electrodes is 10cm, the advancing speed of the syringe pump is 20μL / min, the inner diameter of the injection needle is 1mm, and the humidity is controlled to be less than 80%. Finally, the composite fiber formed by spinning was dried in a vacuum drying oven at 80° C. for 6 hours, and the obtained electrospun membrane was the composite gel polymer electrolyte.
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Abstract
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