A composite solid electrolyte and solid lithium battery
A solid-state electrolyte and solid-state lithium technology, applied in the manufacture of electrolyte batteries, non-aqueous electrolyte batteries, electrolytes, etc., can solve problems such as lithium dendrite growth, positive and negative contact short circuit, battery safety issues, etc., to achieve long-term growth and inhibit growth , Guarantee the effect of normal charging and discharging
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preparation example Construction
[0035] The preparation of the above-mentioned solid-state lithium battery can be prepared by the following method:
[0036] (1) Coating the positive electrode active material slurry on the positive electrode current collector to obtain the positive electrode sheet C;
[0037] (2) The first solid electrolyte slurry E is sequentially coated on the positive electrode active material slurry of the positive electrode sheet C in step (1) 1 , barrier layer slurry P, second solid electrolyte slurry E 2 , to obtain the positive electrode sheet CE with composite solid electrolyte 1 PE 2 ;
[0038] (3) Coating the negative electrode active material slurry on the negative electrode current collector to obtain the negative electrode sheet A;
[0039] (4) The positive electrode sheet CE with composite solid electrolyte obtained in step (2) 1 PE 2 Press together with the negative electrode sheet A obtained in step (3) to obtain a solid lithium battery.
[0040] Among them, the first s...
Embodiment 1
[0046] (1) Production of positive electrode sheet C
[0047] First prepare the surface with LiNbO 3 Coated positive electrode active material, 1000gLiCoO 2 , 51mL of niobium ethoxide, 12g of lithium ethoxide, 1000mL of deionized water and 1000mL of ethanol were thoroughly mixed, and then added dropwise ammonia water until the pH reached 10 while stirring continuously, and the solution was evaporated to dryness, and the obtained powder was heated at 400°C for 8h. Get LiNbO 3 Coated LiCoO 2 .
[0048] Then, 930 g of coated LiCoO 2 Positive electrode active material, 150 gLi 10 GeP 2 S 12 Solid electrolyte material, 30 g binder butadiene rubber, 20 g acetylene black, and 20 g conductive agent carbon fiber were added to 1500 g solvent toluene, and then stirred in a vacuum mixer to form a stable and uniform cathode active material slurry. The positive electrode active material slurry was uniformly and intermittently coated on both sides of the positive electrode current col...
Embodiment 2
[0054] The same steps as in Example 1 were used to prepare a solid-state lithium battery, the difference being that:
[0055] In step (2), 20 g of Na 2 S 2 o 3 Place in 200 mL of toluene solution to prepare barrier layer slurry, and the rest of the steps and operations remain unchanged, wherein the thickness of the barrier layer is about 5 μm.
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