Oxide ceramic composite solid electrolyte and preparation method and application thereof
A technology of oxide ceramics and solid electrolytes, which is applied in the field of electrochemistry, can solve problems such as deterioration, difficulty in compensating the volume change of electrode material deintercalation lithium, and safety issues, so as to inhibit the formation of lithium dendrites and improve the interface between electrolyte and electrode Good contact and thermal stability
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[0028] Example one
[0029] Preparation of garnet-type ceramic electrolyte Li by traditional solid-phase sintering method 6.4 La 3 Zr 1.4 Ta 0.6 O 12 . Weigh Li according to the stoichiometric ratio 2 CO 3 , La 2 O 3 , ZrO 2 And Ta 2 O 5 , Add 30ml isopropanol to the ball mill tank, and ball mill at 250rpm for 20h. To compensate for the loss of lithium volatilization during high-temperature calcination, set Li 2 CO 3 10% excess. After the ball milling, the resulting mixed solution was dried in a blast oven at 80°C for 12 hours to obtain precursor powder. The obtained powder was transferred to a porcelain boat and calcined in a tube furnace at 900°C for 8 hours in an air atmosphere. The pre-sintered powder is ground again and then calcined in air at 1100°C for 24 hours to obtain cubic Li 6.4 La 3 Zr 1.4 Ta 0.6 O 12 .
[0030] Weigh 0.8 g of polyethylene oxide and 0.8 g of polypropylene carbonate, add them to 50 ml of anhydrous acetonitrile, and stir thoroughly at 50°C. After the...
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[0034] Example two
[0035] Preparation of garnet-type ceramic electrolyte Li by traditional solid-phase sintering method 6.2 Al 0.2 La 3 Zr 1.8 Ta 0.2 O 12 . Weigh LiOH and Al according to the stoichiometric ratio 2 O 3 , La 2 O 3 , ZrO 2 And Ta 2 O 5 , Add 50ml isopropanol to the ball mill tank, and ball mill at 300rpm for 24h. To compensate for the loss of lithium volatilization during high-temperature calcination, an excess of 15% of LiOH is set. After the ball milling, the resulting mixed solution was dried in a blast oven at 60°C for 8 hours to obtain a precursor powder. The obtained powder is transferred to a porcelain boat and calcined in a tube furnace at 800°C for 6 hours in an air atmosphere. The pre-sintered powder is ground again and then calcined in air at 1050℃ for 20h to obtain cubic Li 6.2 Al 0.2 La 3 Zr 1.8 Ta 0.2 O 12 .
[0036] Weigh 1.4 g of polyethylene oxide and 0.2 g of polypropylene carbonate, add them to 50 ml of N-methylpyrrolidone, and stir thoroughly...
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[0040] Example three
[0041] Preparation of garnet-type ceramic electrolyte Li by traditional solid-phase sintering method 6.35 La 2.95 Rb 0.05 Zr 1.2 Ta 0.8 O 12 . Weigh LiOH·H according to the stoichiometric ratio 2 O, La 2 O 3 , Rb 2 CO 3 , ZrO 2 And Ta 2 O 5 , Add 50ml isopropanol to the ball mill tank, and ball mill at 200rpm for 16h. In order to compensate for the loss of lithium volatilization during high-temperature calcination, the lithium source is set to exceed 10%. After the ball milling, the resulting mixture was dried in a blast oven at 60° C. for 24 hours to obtain precursor powder. The obtained powder was transferred to a porcelain boat and calcined in a tube furnace at 900°C for 12 hours in an air atmosphere. The pre-sintered powder is ground again, and then calcined in air at 1200°C for 24 hours to obtain cubic Li 6.35 La 2.95 Rb 0.05 Zr 1.2 Ta 0.8 O 12 .
[0042] Weigh 1.12 grams of polyethylene oxide and 0.48 grams of polypropylene carbonate, add them to 50 ...
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