Preparation method of Rb-doped ternary composite solid electrolyte
A technology of solid electrolyte and ternary compound, which is applied in the direction of solid electrolyte, electrolyte battery manufacturing, electrolyte, etc., and can solve the problems of insufficient lithium ion conductivity and other problems
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Embodiment 1
[0031] A preparation method of a sandwich-like ternary composite solid state electrolyte doped with Rb, comprising the following steps:
[0032] (a) Preparation of rubidium-doped LLZTO solid electrolyte powder: LiOH, La(OH) 3 , ZrO 2 、Ta(OH) 5 , RbCl 3Add a dispersant at a molar ratio of 7:3:2:0.5:0.2 and mix thoroughly in a ball mill at 600r / min for 15 hours, then roast at a high temperature of 800°C for 12 hours, ball mill for 6 hours to form a powder, and add a dispersant to form rubidium-doped LLZTO slurry;
[0033] (b) Pour the LLZTRO ceramic slurry on both sides of the 80μm polymer PEO substrate, soak the ceramic slurry to both sides of the polymer substrate, and then put it in a vacuum furnace at 120°C for drying, and use a uniaxial pressure method under 100MPa Press the tablet machine into a sheet-shaped ceramic electrolyte with a thickness of 100 microns;
[0034] (c) Soak the flake electrolyte in ionic liquid (EMI 0.8 Li 0.2 ][TFSI]) for 12h, vacuum-dried at 1...
Embodiment 2
[0036] A preparation method of a sandwich-like ternary composite solid state electrolyte doped with Rb, comprising the following steps:
[0037] (a) Preparation of rubidium-doped LLZTO solid electrolyte powder: LiOH, La(OH) 3 , ZrO 2 、Ta(OH) 5 , RbCl 3 Add dispersant at a molar ratio of 7:3:2:0.5:0.5, mix thoroughly in a ball mill at 600r / min for 15 hours, roast at 1000°C for 12 hours, ball mill for 6 hours to form a powder, and add dispersant to form rubidium-doped LLZTO slurry;
[0038] (b) Pour the LLZTO ceramic slurry on both sides of the 80μm polymer PEO substrate, soak the ceramic slurry to both sides of the polymer substrate, and then put it in a vacuum furnace at 120°C for drying, and use a uniaxial pressure method under 200MPa Press the tablet machine into a sheet-shaped ceramic electrolyte with a thickness of 100 microns;
[0039] (c) Soak the flake electrolyte in ionic liquid (EMI 0.8 Li 0.2 ][TFSI]) for 12h, vacuum-dry the solid electrolyte at 100°C to form ...
Embodiment 3
[0041] A preparation method of a sandwich-like ternary composite solid state electrolyte doped with Rb, comprising the following steps:
[0042] (a) Preparation of rubidium-doped LLZTO solid electrolyte powder: LiOH, La(OH) 3 , ZrO 2 、Ta(OH) 5 , RbCl 3 Add dispersant at a molar ratio of 7:3:2:1:1, mix thoroughly in a ball mill at 600r / min for 15 hours, roast at a high temperature of 1100°C for 15 hours, ball mill for 6 hours to form a powder, and add a dispersant to form rubidium-doped LLZTO slurry;
[0043] (b) Pour the LLZTO ceramic slurry on both sides of the polymer substrate, soak the ceramic slurry on both sides of the polymer PAN substrate, then put it in a vacuum oven at 120°C for drying, and use a uniaxial press at 300MPa to press the tablet machine Pressed into a sheet-shaped ceramic electrolyte with a thickness of 75 microns;
[0044] (c) Soak the flake electrolyte in ionic liquid (EMI 0.8 Li 0.2 ][TFSI]) for 18h, vacuum-dry the thin-sheet solid electrolyte a...
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