Preparation method and application of solid-state electrolyte-coated modified lithium ion battery positive electrode material
A solid-state electrolyte, lithium-ion battery technology, applied in battery electrodes, positive electrodes, secondary batteries, etc., can solve the problems of difficult ultra-thin coating control, rate performance limitations, rough coating effect, etc., to promote lithium ion transport. , The effect of reducing dissolution loss and inhibiting side reactions
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[0032] Example 1
[0033] (1) Put C 9 H 21 O 3 Al and CH 2 Disperse OLi in ethanol, then add an appropriate amount of appropriate stabilizer (volume ratio of stabilizer: ethanol: 3:2000), stir for 1 hour to obtain aluminum metalithium sol;
[0034] (2) Take 0.3 g of LiNi as cathode material 0.6 Co 0.2 Mn 0.2 O 2 Add the above sol, transfer to the lining of the polytetrafluoroethylene reactor, stir for 1~2h, and directly use the solvothermal method to keep at 120~180℃ for 15h to obtain the solid electrolyte coated modified cathode material precursor;
[0035] (3) Filter the product in step (2), then wash it with absolute ethanol 3 times, and then keep the filter cake in a blast drying oven at 80°C for 3 hours to obtain LiAlO 2 Precursor for coating cathode material;
[0036] (4) Calcining the prepared solid electrolyte-coated modified cathode material precursor at 500°C for 4 hours to obtain the solid electrolyte-coated modified lithium ion battery cathode material;
[0037] (5) Weigh 0....
Example Embodiment
[0043] Example 2
[0044] (1) Put C 12 H 27 O 3 Al and CH 2 Disperse OLi in ethanol, then add an appropriate amount of appropriate stabilizer (volume ratio of stabilizer: ethanol: 3:2000), stir for 1 hour to obtain aluminum metalithium sol;
[0045] (2) Take 0.3 g of LiNi as cathode material 0.5 Co 0.2 Mn 0.3 O 2 Add the above sol, transfer to the lining of the polytetrafluoroethylene reactor, stir for 1~2h, and directly use the solvothermal method to keep at 120~180℃ for 15h to obtain the solid electrolyte coated modified cathode material precursor;
[0046] (3) Filter the product in step (2), then wash it with absolute ethanol 3 times, and then keep the filter cake in a blast drying oven at 80°C for 4 hours to obtain LiAlO 2 Precursor for coating cathode material;
[0047] (4) Calcining the prepared solid electrolyte-coated modified cathode material precursor at 500°C for 4 hours to obtain the solid electrolyte-coated modified lithium ion battery cathode material;
[0048] (5) Weigh 0...
Example Embodiment
[0050] Example 3
[0051] (1) Put C 9 H 21 O 3 Al and LiNO 3 Disperse in ethanol, then add an appropriate amount of appropriate stabilizer (volume ratio of stabilizer: ethanol: 3:2000), stir for 1 hour to obtain aluminum metalithium sol;
[0052] (2) Take 0.3 g of LiNi as cathode material 0.6 Co 0.2 Mn 0.3 O 2 Add the above sol, transfer to the lining of the polytetrafluoroethylene reactor, stir for 1~2h, and directly use the solvothermal method to keep at 120~180℃ for 15h to obtain the solid electrolyte coated modified cathode material precursor;
[0053] (3) Filter the product in step (2), then wash it with absolute ethanol 3 times, and then keep the filter cake in a blast drying oven at 80°C for 2~4 hours to obtain LiAlO 2 Precursor for coating cathode material;
[0054] (4) Calcining the prepared solid electrolyte-coated modified cathode material precursor at 500°C for 4 hours to obtain the solid electrolyte-coated modified lithium ion battery cathode material;
[0055] (5) Weigh 0....
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