Method for preparing electrolyte ceramic membrane of lithium ion battery
A lithium-ion battery and electrolyte technology, which is applied in the preparation of lithium-ion battery electrolyte ceramic membranes, and in the field of preparation of lithium-ion battery electrolyte ceramic membranes by tape casting, can solve the problems of not being able to meet large-scale production applications, complex equipment, and high production costs
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Embodiment 1
[0017] Method is the same as Comparative Example 1, according to Li 1.4 Al 0.4 Ge 0.8 Ti 0.8 (PO 4 ) 3 (LAG-TP) stoichiometric Li 2 CO 3 ,TiO 2 , Al(OH) 3 , GeO 2 with NH 4 h 2 PO 4 Mix evenly by ball milling, then heat treatment at 700°C for 2 hours for decomposition and synthesis, and grind after cooling to obtain powder.
[0018] Add the above-mentioned powder into an ethanol solvent, then add 2wt.% triethanolamine, 6wt.% PVB and 10wt.% plasticizer by weight of the powder, and continue ball milling for 4 hours to obtain a slurry for casting; flow The film obtained after delay has better strength and toughness. The dense electrolyte ceramics were obtained after sintering at 900℃ for 12h.
Embodiment 2
[0020] Method is the same as Comparative Example 1, according to Li 1.4 Al 0.4 Ti 1.6 (PO 4 ) 3 (LAG-TP) stoichiometric Li 2 CO 3 ,TiO 2 , Al(OH) 3 , GeO 2 with NH 4 h 2 PO 4 Mix evenly by ball milling, then heat treatment at 700°C for 2 hours for decomposition and synthesis, and grind after cooling to obtain powder.
[0021] Add the above powder into the azeotropic solution of propanol and trichlorethylene, then add 1wt% triethanolamine, 9wt% PVB and 10.5wt% plasticizer by weight of the powder, and continue ball milling for 4 hours to obtain cast The slurry used; the film obtained after casting has good strength and toughness. The dense electrolyte ceramics were obtained after sintering at 1000℃ for 12h.
Embodiment 3
[0023] Analytical pure Li 2 CO 3 ,, Al(OH) 3 ,,TiO 2 with NH 4 h 2 PO 4 as raw material, according to Li 1.4 Al 0.4 Ge 0.96 Ti 0.64 (PO 4 ) 3 Stoichiometric ratio, fully divided and mixed, heat treated at 700°C for 4 hours to fully decompose easily decomposed products, then cooled and ground for later use. In a glove box with an argon atmosphere, a certain amount of precursor material is placed in a stainless steel tank, and a ball-milling medium stainless steel ball is added. The selected ball-to-material ratio is 15:1, the ball milling speed is 500 rpm, and ball milling is performed at room temperature to obtain an amorphous Powder. Powder TEM such as figure 2 shown.
[0024] Add the above-mentioned amorphous powder into the azeotropic solution of butanone and ethanol, then add 0.5wt.% phosphate ester, 4wt.% PVB and 8wt.% plasticizer by weight of the powder, and continue ball milling for 4 hours. A slurry for casting is obtained; the film obtained after casti...
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