A kind of lithium-sulfur battery cathode material and preparation method thereof
A cathode material, lithium-sulfur battery technology, applied in battery electrodes, positive electrodes, secondary batteries, etc., can solve problems such as self-discharge, low product conductivity, electrode structure collapse, etc., to improve electrical conductivity, improve catalytic activity, The effect of improving structural stability
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Embodiment 1
[0071] (1) 0.6g of Ketjen Black and 1.4g of sulfur were added to 5ml of ethanol solution, then added to the ball milling tank of the ball mill, and milled for 2h at a rotational speed of 1000rpm to obtain a mixed slurry of sulfur / Ketjen black; then The sulfur / ketjen black mixed slurry was dried in a blast drying oven at 60°C for 24 hours, and ground and pulverized with an agate mortar to obtain a sulfur / ketjen black composite material;
[0072] (2) adding 250 mg of carbon nanotubes to 500 ml of saturated sulfur ethanol solution, and pulverizing with a cell crusher for 20 hours to obtain a carbon nanotube dispersion with a concentration of 0.5 mg / ml;
[0073] (3) Mix the above-mentioned sulfur / Ketjen black composite material and carbon nanotube dispersion liquid in a ratio of the mass ratio of sulfur / Ketjen black composite material and carbon nanotubes to 85:15, ultrasonically disperse at room temperature for 30min and then vacuumize Suction filtration, and drying in a blast dr...
Embodiment 2
[0076] (1) 0.6g of Ketjen Black and 1.4g of sulfur were added to 5ml of ethanol solution, then added to the ball milling tank of the ball mill, and milled for 2h at a rotational speed of 1000rpm to obtain a mixed slurry of sulfur / Ketjen black; then The sulfur / ketjen black mixed slurry was dried in a blast drying oven at 60°C for 24 hours, and ground and pulverized with an agate mortar to obtain a sulfur / ketjen black composite material;
[0077] (2) adding 250 mg of carbon nanotubes to 500 ml of saturated sulfur ethanol solution, and pulverizing with a cell crusher for 20 hours to obtain a carbon nanotube dispersion with a concentration of 0.5 mg / ml;
[0078] (3) Combine the above sulfur / ketjen black composite material with powdered Ti 3 C 2 T x After mixing at a mass ratio of 95:1, add it to 5ml of ethanol solution, then add it to the ball milling tank of the ball mill, and repeat the steps of ball milling at 1000rpm for 10min and standing for 10min to obtain sulfur / ketjen ...
Embodiment 3
[0082] (1) 0.6g of Ketjen Black and 1.4g of sulfur were added to 5ml of ethanol solution, then added to the ball milling tank of the ball mill, and milled for 2h at a rotational speed of 1000rpm to obtain a mixed slurry of sulfur / Ketjen black; then The sulfur / ketjen black mixed slurry was dried in a blast drying oven at 60°C for 24 hours, and ground and pulverized with an agate mortar to obtain a sulfur / ketjen black composite material;
[0083] (2) adding 250 mg of carbon nanotubes to 500 ml of saturated sulfur ethanol solution, and pulverizing with a cell crusher for 20 hours to obtain a carbon nanotube dispersion with a concentration of 0.5 mg / ml;
[0084] (3) Take Ti with a concentration of 0.2 mg / ml 3 C 2 T x Solution 20ml, KMnO with a concentration of 0.2mg / ml in an ice bath 4 The solution was dropwise added to Ti at a rate of 5-50 μL / s 3 C 2 T x In the solution, the stirring speed was 200rpm, and Ti was obtained after 0.5h reaction time. 3 C 2 T x / MnO x mixed ...
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