A kind of gelatinable system containing cyclic ether compound and its preparation method and application
An ether compound and gelation technology, which is applied in the direction of electrolyte immobilization/gelation, fuel cell half-cells and secondary battery-type half-cells, electrochemical generators, etc., can solve the problem of limiting the use of gels and popularization, cumbersome and lengthy experimental methods, time-consuming and labor-intensive preparation, etc., to achieve the effect of solving solution leakage, high charge and discharge efficiency, and preventing battery short circuit
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Embodiment 1
[0099] (1) Preparation of gelatable system and solid electrolyte
[0100] Weigh 0.5g of solid lithium tetrafluoroborate in a reagent bottle, add 1.6mL of tetrahydropyran, and make all the lithium salts dissolve under magnetic stirring to prepare lithium tetrafluoroborate / tetrahydrogen with a lithium salt content of 23wt% A pyran solution is obtained to obtain a gelatable system; after standing for a period of time, a solid electrolyte is obtained.
[0101] After testing, the formation time of the solid electrolyte is 6h, the formation temperature of the solid electrolyte is room temperature, and the transition temperature of the solid electrolyte is 90°C; the conductivity of the solid electrolyte is 1.06×10 -6 S / cm.
[0102] When the prepared solid electrolyte is heated above 90°C, the solid electrolyte begins to become viscous, and the solid electrolyte is observed to flow downward when the reagent bottle is inverted, indicating that the transition temperature of the solid e...
Embodiment 2
[0106] (1) Preparation of gelatable system and gel (which can be used as a gel electrolyte for batteries)
[0107] Weigh 0.7g of solid lithium hexafluoroarsenate into a reagent bottle, add 5.0mL of 1,4-dioxane, and under magnetic stirring, prepare lithium hexafluoroarsenate with a lithium salt content of 12wt% / 1 , 4-dioxane solution to obtain a gelatable system; continue to stir and stand for a period of time to obtain a gel.
[0108] After testing, the formation time of the gel is 24h; the formation temperature of the gel is room temperature, the transition temperature of the gel is 65°C, and the conductivity of the gel is 5.27×10 -4 S / cm.
[0109] figure 1 It is an optical photograph of the gel of Example 2. It can be seen from the figure that a colorless and transparent gel can be prepared by using the ratio of the above-mentioned lithium salt and cyclic ether cyclic compound; in addition, below the transition temperature, The gel did not flow when the vial was inverted....
Embodiment 3
[0114] (1) Preparation of gelatable system and solid electrolyte
[0115] Weigh 0.45 g of lithium fluorosulfonimide and 0.45 g of lithium perchlorate (LiClO 4) solid in a reagent bottle, add 3.6 mL of 2-methyltetrahydropyran, and prepare under magnetic stirring to prepare lithium fluorosulfonimide+LiClO with a lithium salt content of 20 wt% 4 / 2-methyltetrahydropyran solution to obtain a gelatinable system; continue stirring and stand for a period of time to obtain a solid electrolyte.
[0116] After testing, the formation time of the solid electrolyte is 12h; the formation temperature of the solid electrolyte is room temperature, the transition temperature of the solid electrolyte is 80°C, and the conductivity of the solid electrolyte is 3.26×10 -6 S / cm.
[0117] figure 2 It is an optical photo of the solid electrolyte of Example 3. It can be seen from the figure that the solid electrolyte can be prepared by using the ratio of the above-mentioned lithium salt and cyclic e...
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