Preparation method and application of graphene-carbon nanotube/cobalt manganese alloy oxide nanosheet compound
A technology of carbon nanotubes and graphene, which is applied in the field of preparation of graphene-carbon nanotubes/cobalt-manganese alloy oxide nanosheet composites, can solve problems such as insufficient cycle stability, achieve superior electrochemical performance, and improve electrical conductivity The effect of overcoming poor cycle performance and rate performance
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
Embodiment 1
[0024] Weigh 200 mg of commercial graphene-carbon nanotubes with a mass ratio of 1:0.05 into a 250 ml beaker, add 60 ml of deionized water, and ultrasonically disperse for 1 h. Add 10ml potassium citrate solution (0.1g / ml) in the beaker, after mixing uniformly, add 10ml mass fraction 10% cobalt manganese salt mixture solution (CoSO 4 with Mn(NO 3 ) 2 Mix according to the mass ratio of 1:1), 10ml of urea solution (0.1g / ml), and finally add ammonia water to the mixed solution to adjust the pH of the solution to 8-10, and sonicate for 2h. After the reaction, the mixed solution was transferred to a 100ml reactor to react at 150°C for 100min, and then dried by suction filtration (60°C, 1h). The dried product was calcined at 500 °C for 20 min in a tube furnace. The obtained product is the graphene-carbon nanotube / cobalt-manganese alloy oxide nanosheet composite.
Embodiment 2
[0026] Weigh 200 mg of commercial graphene-carbon nanotubes with a mass ratio of 1:0.45 into a 250 ml beaker, add 60 ml of deionized water, and ultrasonically disperse for 2 h. Add 20ml potassium citrate solution (1g / ml) in the beaker, after mixing uniformly, add 25ml mass fraction 15% cobalt manganese salt mixture solution (CoCl 2 with MnSO 4 Mix according to the mass ratio of 1:1), 15ml of urea solution (1g / ml), and finally add ammonia water to the mixed solution to adjust the pH of the solution to 8-10, and sonicate for 2h. After the reaction, the mixed solution was transferred to a 100ml reactor to react at 200°C for 200min, and then dried by suction filtration. The dried product was calcined at 400 °C for 40 min in a tube furnace. The obtained product is the graphene-carbon nanotube / cobalt-manganese alloy oxide nanosheet composite.
Embodiment 3
[0028] Weigh 200 mg of commercial graphene-carbon nanotubes with a mass ratio of 1:1 into a 250 ml beaker, add 60 ml of deionized water, and ultrasonically disperse for 3 h. Add 30ml potassium citrate solution (5g / ml) in the beaker, after mixing uniformly, add 15ml mass fraction 25% cobalt manganese salt mixture solution (CoC 2 o 4 with MnCl 2 Mix according to the mass ratio of 1:1), 20ml of urea solution (5g / ml), and finally add ammonia water dropwise to the mixed solution to adjust the pH of the solution to 8-10, and sonicate for 2h. After the reaction, the mixed solution was transferred to a 100ml reactor to react at 180°C for 300min, and then dried by suction filtration. The dried product was calcined in a tube furnace at 400 °C for 60 min. The obtained product is the graphene-carbon nanotube / cobalt-manganese alloy oxide nanosheet composite.
PUM
Login to View More Abstract
Description
Claims
Application Information
Login to View More