High-sulfur supported lithium-sulfur battery positive electrode, preparation method of lithium-sulfur battery positive electrode, and lithium-sulfur battery
A lithium-sulfur battery and positive electrode technology, which is applied in the high-sulfur-loaded lithium-sulfur battery positive electrode and its preparation, and in the field of lithium-sulfur batteries, can solve the problems of difficult sulfur infiltration technology, uneven distribution of sulfur, and failure to meet the application requirements. Achieve the effect of improving electrochemical performance, improving coating quality and reducing preparation cost
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[0034] Example 1:
[0035] A method for preparing a high-sulfur-loaded lithium-sulfur battery positive electrode of the present invention, and its process flow diagram is as follows: figure 1 As shown, including the following steps:
[0036] (1) Add 100g of Ketjen Black and 500g of sulfur to 2.4kg of purified water, mix evenly to obtain a carbon-sulfur mixed slurry, and then add the carbon-sulfur mixed slurry into the barrel of the sand mill for nano ball milling, the ball milling speed is 1000 rpm, and the milling time Is 30min;
[0037] (2) The carbon-sulfur mixed slurry after step (1) is dried in a blast drying oven at 80°C for 20 hours, pulverized, and then transferred to a vacuum oven, heated at 155°C for 12 hours to obtain Piano black / sulfur composite cathode material;
[0038] (3) Add the Ketjen black / sulfur composite cathode material, carbon nanotubes, and La133 type binder after step (2) into water at a mass ratio of 7:2:1, and mix them to obtain a lithium-sulfur battery cat...
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[0041] Example 2:
[0042] A method for preparing a high-sulfur-loaded lithium-sulfur battery anode of the present invention includes the following steps:
[0043] (1) Add 100g of carbon nanotubes and 500g of sulfur to 1.8kg of purified water, mix evenly to obtain a carbon-sulfur mixed slurry, and then add the carbon-sulfur mixed slurry into the barrel of the sand mill for nano-ball milling. The ball milling speed is 1100rpm and the milling time 20min;
[0044] (2) The carbon-sulfur mixed slurry after step (1) is dried in a blast drying oven at 90°C for 15 hours, pulverized, and then transferred to a vacuum oven, heated and melted at 165°C for 10 hours to obtain carbon Nanotube / sulfur composite cathode material;
[0045] (3) Add the carbon nanotube / sulfur composite positive electrode material, SuperP, and La133 type binder after step (2) into water at a mass ratio of 7:2:1, and mix well to prepare a lithium-sulfur battery positive electrode slurry precursor Then, the positive electr...
Example Embodiment
[0048] Example 3:
[0049] A method for preparing a high-sulfur-loaded lithium-sulfur battery anode of the present invention includes the following steps:
[0050] (1) Add 80g Ketjen black, 20g carbon nanotubes and 500g sulfur into 2kg purified water, mix evenly to obtain a carbon-sulfur mixed slurry, and then add the carbon-sulfur mixed slurry into the barrel of the sand mill for nano-ball milling. The speed of the ball mill is 1200rpm, ball milling time is 40min;
[0051] (2) The carbon-sulfur mixed slurry after step (1) is dried in a blast drying oven at 60°C for 20 hours, pulverized, and then transferred to a vacuum oven and heated at 160°C for 10 hours to obtain Piano black-carbon nanotube / sulfur composite cathode material;
[0052] (3) Add the Ketjen black-carbon nanotube / sulfur composite cathode material, carbon nanotubes, and La132 type binder after step (2) into water at a mass ratio of 6:3:1, and mix well to obtain lithium Sulfur battery cathode slurry precursor, and then ...
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