Magnesium-sulfur battery, transition metal sulfide/sulfur composite positive electrode material and composite method
A composite cathode material, transition metal technology, applied in battery electrodes, non-aqueous electrolyte batteries, circuits, etc., can solve the problem that the cycle performance of magnesium-sulfur batteries is difficult to obtain a large improvement, reduce the energy density of magnesium-sulfur batteries, and cannot suppress the shuttle effect, etc. problem, to achieve the effect of inhibiting the shuttle effect, increasing the cycle stability, high electronic conductivity and electrochemical activity
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Embodiment 1
[0053] This embodiment provides a Mo 6 S 8 / S composite cathode material preparation and performance testing.
[0054] (1)Mo 6 S 8 Synthesis: Take molybdenum disulfide, copper sulfide, and molybdenum powder with a molar ratio of 3:2:3, ball mill for 0.5h, and then in 10 6 Press down into granules and put them into a sealed stainless steel tube; raise the temperature to 900 degrees Celsius at a rate of 2 degrees Celsius per minute in argon, keep it for 24 hours and then cool down naturally to obtain Cu 2 Mo 6 S 8 . Then it was placed in 6 molar HCl for 12 hours with oxygen to remove Cu. The product was washed with water and dried in a vacuum oven at 100 degrees Celsius for 12 hours to obtain Mo 6 S 8 .
[0055] (2)Mo 6 S 8 / S composite material preparation: weigh 1g Mo 6 S 8 , 0.1g of precipitated sulfur, 1g of graphene, 1g of Ketjen black, placed in a ball mill jar, sealed and ball milled for 1 hour to obtain Mo 6 S 8 / S Composite.
[0056] (3) Weigh Mo respec...
Embodiment 2
[0060] This embodiment provides a Mo 6 S 8 / S composite cathode material preparation and performance testing.
[0061] (1)Mo 6 S 8 Synthesis: Take molybdenum disulfide, copper sulfide, and molybdenum powder with a molar ratio of 3:2:3, ball mill for 0.5h, and then in 10 6 Press down into granules and put them into a sealed stainless steel tube; raise the temperature to 900 degrees Celsius at a rate of 2 degrees Celsius per minute in argon, keep it for 24 hours and then cool down naturally to obtain Cu 2 Mo 6 S 8 . Then it was placed in 6 molar HCl for 12 hours with oxygen to remove Cu. The product was washed with water and dried in a vacuum oven at 100°C for 12 hours to obtain Mo 6 S 8 .
[0062] (2)Mo 6 S 8 / S composite material preparation: weigh 1gMo 6 S 8 , 0.1g carbon nanotubes, 0.1g acetylene black, put in a ball mill jar, add 20mL water and 20mL ethanol, seal the ball mill for 1 hour; then dissolve 0.5g sodium thiosulfate in it, then slowly add 0.5 mole H ...
Embodiment 3
[0066] This embodiment provides a TiS 2 / S composite cathode material preparation and performance testing.
[0067] (1)TiS 2 / S composite material preparation: weigh 1g TiS 2 , 1g of precipitated sulfur, 0.7g of graphene, and 0.7g of Ketjen black were placed in a ball mill jar, sealed and ball milled for 24 hours to obtain TiS 2 / S Composite.
[0068] (2) Weigh TiS with a mass ratio of 7:1:1:1 2 / S composite material, Super-P carbon black, carbon nanotubes, polyacrylic acid, ground evenly, rolled into a film, and dried to obtain the positive electrode sheet. The content of the active substance is 2mg / cm 2 .
[0069] (3) In a glove box filled with argon, the positive electrode sheet, magnesium foil, and 0.03 mole of MgCl 2 -AlCl 3 -Mg(TFSI) 2 Dissolved in tetrahydrofuran electrolyte to assemble a soft pack battery. And the battery at 0.2-2.5Vvs.Mg / Mg 2+ Electrochemical tests were carried out in the range. The capacity test results are shown in Table 1.
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