A kind of porous carbon/sulfur composite material and its preparation method and application
A technology of porous carbon materials and composite materials, which is applied in the field of porous carbon/sulfur composite materials and their preparation and application, and can solve the problems of high rate performance and poor cycle performance of sulfur-carbon composite materials, poor experimental repeatability, and cumbersome operations. , to achieve the effect of being suitable for large-scale production, easy to obtain raw materials, and high degree of practicality
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
Embodiment 1
[0029] Embodiment 1, preparation porous carbon / sulfur composite material
[0030] Weigh the mixture of alginic acid and sodium hydroxide, the mass ratio of sodium hydroxide is 50%, add water, stir and mix evenly. The moisture was evaporated, and the mixture was heated at 700°C for 8h under a nitrogen atmosphere. After the reaction is complete, add 50% sulfuric acid aqueous solution, stir at room temperature for 24 hours, centrifuge and wash with water several times until neutral. Vacuum drying at 80°C yielded porous carbon. The mixture of porous carbon and sulfur powder was weighed, and the mass content of sulfur was 50%. After mixing evenly, it was heated at 120°C for 48h under an air atmosphere to obtain a porous carbon / sulfur composite material.
[0031] The scanning electron micrograph of the porous carbon / sulfur composite material prepared in this embodiment is as follows figure 1 shown.
[0032] Electrochemical performance characterization of porous carbon / sulfur com...
Embodiment 2
[0036] Embodiment 2, preparation porous carbon / sulfur composite material
[0037] Weigh the mixture of alginic acid and sodium hydroxide, the mass ratio of sodium hydroxide is 30%, add water, stir and mix evenly. The moisture was evaporated, and the mixture was heated at 850°C for 6h under a nitrogen atmosphere. After the reaction is complete, add 30% sulfuric acid aqueous solution, stir at room temperature for 36 hours, centrifuge and wash with water several times until neutral. Vacuum drying at 100°C yielded porous carbon. Weigh the mixture of porous carbon and sulfur powder, the mass content of sulfur is 45%, after mixing evenly, heat at 250°C for 10h under air atmosphere to obtain porous carbon / sulfur composite material.
[0038] The electrochemical performance of the obtained porous carbon / sulfur composite material was tested according to the method in Example 1, and the key experimental conditions and simulated battery test results for preparing the porous carbon / sulfu...
Embodiment 3
[0039] Embodiment 3, preparation porous carbon / sulfur composite material
[0040]Weigh the mixture of alginic acid and potassium hydroxide, the mass ratio of potassium hydroxide is 25%, add water, stir and mix evenly. The moisture was evaporated, and the mixture was heated at 900°C for 5h in an argon atmosphere. After the reaction is complete, add 20% aqueous nitric acid solution, stir at room temperature for 24 hours, centrifuge and wash with water several times until neutral. Drying at 150°C in an argon atmosphere yielded porous carbon. The mixture of porous carbon and sulfur powder was weighed, and the mass content of sulfur was 40%. After mixing evenly, it was heated at 160° C. for 36 h under an air atmosphere to obtain a porous carbon / sulfur composite material.
[0041] The electrochemical performance of the obtained porous carbon / sulfur composite material was tested according to the method in Example 1, and the key experimental conditions and simulated battery test res...
PUM
| Property | Measurement | Unit |
|---|---|---|
| pore size | aaaaa | aaaaa |
| pore size | aaaaa | aaaaa |
Abstract
Description
Claims
Application Information
Login to View More