All-solid-state thick-film lithium battery and preparation method thereof
An all-solid-state lithium battery technology, which is applied in the manufacture of electrolyte batteries, secondary batteries, non-aqueous electrolyte batteries, etc., can solve the problems of low battery capacity, achieve small volume changes, high production efficiency, and improve ion diffusion capabilities.
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Embodiment 1
[0042] A method for preparing an all-solid-state thick-film lithium battery, comprising the following steps:
[0043] (1) The positive electrode active material LiCoO 2 , conductive carbon black, binder polyvinylidene fluoride and solid electrolyte Li 3 PO 4 Mix evenly in N-methylpyrrolidone liquid medium to make positive electrode slurry; wherein, the mass ratio of positive electrode active material, solid electrolyte, conductive agent and binder is: 8:0.5:0.5:1;
[0044] (2) The positive electrode slurry was printed on the positive electrode current collector aluminum foil by casting method printing equipment, then dried in a blast oven at 60°C for 6h, and then transferred to a vacuum oven at -0.1MPa and 110°C for 10h, Finally, it was flattened with a roller press to obtain a thick film positive electrode with a thickness of 95 μm;
[0045] (3) The electrolyte material LiPON is prepared on the thick film positive electrode with a thickness of 9 μm LiPON thin film electrol...
Embodiment 2
[0048] A method for preparing an all-solid-state thick-film lithium battery, comprising the following steps:
[0049] (1) The positive electrode active material LiMn 2 o 4 , conductive agent conductive carbon black, binder polyvinylidene fluoride and solid electrolyte LLTO are uniformly mixed in N-methylpyrrolidone liquid medium to prepare positive electrode slurry; among them, positive electrode active material, solid electrolyte, conductive agent and binder The mass ratio of the agent is: 4:3.5:1.5:1;
[0050] (2) The positive electrode slurry was printed on the positive electrode current collector aluminum foil by casting method printing equipment, then dried in a blast oven at 60°C for 6h, and then transferred to a vacuum oven at -0.1MPa and 110°C for 10h, Finally, it was flattened with a roller press to obtain a thick film positive electrode with a thickness of 120 μm;
[0051] (3) The electrolyte material LiPON is prepared on the thick film positive electrode by magne...
Embodiment 3
[0054] A method for preparing an all-solid-state thick-film lithium battery, comprising the following steps:
[0055] (1) The positive electrode active material LiFePO 4 , Conductive agent Conductive carbon black, binder polyvinylidene fluoride and solid electrolyte are uniformly mixed in N-methylpyrrolidone liquid medium to prepare positive electrode slurry; wherein, positive active material, solid electrolyte, conductive agent and binder The mass ratio is: 6:1.5:1.5:1, the solid electrolyte is a mixture of PAN and LiTFSI (AN and Li + The molar ratio is 4:1);
[0056] (2) Print the positive electrode slurry on the positive electrode current collector aluminum foil by screen printing equipment, then dry it in a blast oven at 60°C for 6h, then transfer it to a vacuum oven at -0.1MPa and 110°C for 10h, and finally Flatten with a roller press to obtain a thick film positive electrode with a thickness of 500 μm;
[0057] (3) The electrolyte material LLTO is prepared on the thic...
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