High-performance lithium-sulfur battery composite positive electrode material and preparation method thereof
A technology of lithium-sulfur batteries and composite materials, which is applied in the direction of electrode manufacturing, lithium batteries, battery electrodes, etc., can solve problems such as single structure and function, inability to completely suppress polysulfides, single function of simple graphene diaphragm coating, etc., to achieve expansion Spatial structure, improving cycle stability and unit capacity, improving the effect of conductivity and capacity
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[0041] Step 1. Put 300mg of graphene oxide in a 60°C oven and bake for 24 hours to remove moisture for later use.
[0042] Step 2. After ultrasonically cleaning 45g of dewatering molecular sieves with alcohol for 5 times, bake them in an oven at 100°C for 24 hours to completely remove the moisture in the molecular sieves;
[0043] Step 3. Put the molecular sieve after dehydration in step 2 into 1000mL of NMP solution, and let it rest for 48 hours to completely remove the moisture in NMP. After 48 hours, use a pipette to absorb the upper liquid, and the NMP solution in the subsequent steps is dehydrated. NMP;
[0044] Step: 4. Slowly add 300mg graphene oxide (GO) in 100mL NMP solution, after stirring for 30 minutes, use ultrasonic dispersion for 60min to completely disperse the graphene to obtain a uniform dispersion;
[0045] Step 5. Add 650 μL of HDI into 100 mL of NMP solution, stir for 5 minutes to mix the two solutions evenly, condense the obtained mixture in an oil bath ...
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