A kind of solid lithium ion electrolyte and preparation method thereof
A lithium ion and electrolyte technology, applied in the field of solid lithium ion electrolyte and its preparation, can solve the problems of low lithium ion conductivity and limited contact area
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[0050] The present invention also provides a kind of preparation method of solid lithium ion electrolyte, comprises the following steps:
[0051] A) mixing solid lithium ion electrolyte precursor powder, dispersant, binder and solvent to obtain a mixed slurry;
[0052] B) coating the mixed slurry on the substrate, and then placing it in a flocculant for curing to obtain a cured film;
[0053] C) after separating the cured film from the substrate, drying and sintering to obtain a solid lithium ion electrolyte.
[0054] In the present invention, firstly, solid lithium ion electrolyte precursor powder, dispersant, binder and solvent are mixed to obtain mixed slurry.
[0055] In the present invention, there is no special limitation on the type of the solid lithium ion electrolyte precursor powder, preferably Li 7 La 3 Zr2 o 12 Precursor powder, the present invention for the Li 7 La 3 Zr 2 o 12 The source of the precursor powder is not particularly limited, and can be prepa...
Embodiment 1
[0107] Add 0.182mol of lithium hydroxide, 0.06mol of lanthanum trioxide, and 0.04mol of zirconium dioxide into the ball milling tank, add isopropanol, ball mill for 12 hours, and dry the solvent at 120°C after ball milling.
[0108] The dried powder was properly ground in a mortar, and then calcined at 1100 °C for 12 h to obtain the precursor. 7 La 3 Zr 2 o 12 X-ray diffraction was performed on the precursor body, the results are shown in figure 1 , figure 1 Li prepared for Examples 1 to 3 of the present invention 7 La 3 Zr 2 o 12 XRD pattern of the precursor body, figure 1 Among them, 1 is the Li prepared in Example 1 of the present invention 7 La 3 Zr 2 o 12 XRD patterns of the precursors.
[0109] Grind the precursor prepared above in a mortar for 10 min, take 9 g of precursor powder, add 4.01 g of N-methylpyrrolidone, 0.167 g of polyvinylpyrrolidone, and 0.668 g of polyethersulfone, and stir mechanically for 2 h to obtain a slurry.
[0110] Spread the slurry ...
Embodiment 2
[0113] Add 0.077mol of lithium carbonate, 0.06mol of lanthanum trioxide, and 0.04mol of zirconium dioxide into a ball mill jar, add isopropanol, and mill for 12 hours. After ball milling, dry the solvent at 120°C. The dried powder is placed in a mortar Properly grind, then calcined at 800°C for 10h, and then calcined at 900°C for 10h to obtain the precursor. to Li 7 La 3 Zr 2 o 12 X-ray diffraction was performed on the precursor body, the results are shown in figure 1 , figure 1 Li prepared for Examples 1 to 3 of the present invention 7 La 3 Zr 2 o 12 XRD pattern of the precursor body, figure 1 Among them, 2 is the Li prepared by Example 2 of the present invention 7 La 3 Zr 2 o 12 XRD patterns of the precursors.
[0114] Grind the above precursor in a mortar for 10 min, take 6 g of precursor powder, add 2.673 g of N-methylpyrrolidone, 0.113 g of polyvinyl pyrrolidone, and 0.445 g of polyethersulfone, and stir mechanically for 2 h to obtain a slurry.
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