A kind of lithium-sulfur battery cathode material and preparation method thereof
A cathode material, lithium-sulfur battery technology, applied in lithium batteries, battery electrodes, sulfur preparation/purification, etc., can solve the problems of poor cycle stability, obvious shuttle effect, poor electrical conductivity, etc., to prevent agglomeration and simplify the preparation process. , Improve the effect of poor electrical conductivity
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
Embodiment 1
[0031] The positive electrode material of the lithium-sulfur battery is a cobalt tetroxide double-layer hollow sphere-carbon nanotube-sulfur composite material.
[0032] The cobalt tetroxide double-layer hollow sphere is composed of two inner and outer hollow spheres, the diameter of the inner hollow sphere is 400-500 nm, and the diameter of the outer hollow sphere is 1.2-1.6 μm. The obtained cobalt tetroxide double-layer hollow microspheres have good size uniformity, rough shell surface, and consist of uniform nanoparticles with abundant pores, providing abundant ion transfer channels, which are beneficial to the entry of electrolyte as electrode materials. The larger inner cavity between shells favors larger sulfur loadings.
[0033] The preparation method of the lithium-sulfur battery cathode material includes the following steps:
[0034] (1) Preparation of cobalt tetroxide double-layer hollow spheres: after dissolving 15g of glucose and 8g of cobalt nitrate in 150mL of d...
Embodiment 2
[0037] The preparation method of the lithium-sulfur battery cathode material includes the following steps:
[0038] (1) Preparation of cobalt tetroxide double-layer hollow spheres: after dissolving 10 g of glucose and 5 g of cobalt nitrate in 100 mL of deionized water, place them in a reactor and carry out a hydrothermal reaction at 150° C. for 12 hours. After the reaction is completed, the suspension is obtained by cooling at room temperature. The obtained suspension was centrifuged, the product was collected, washed three times with deionized water, and dried at 60°C to obtain powder; then the obtained powder was placed in a muffle furnace, and the temperature was increased at a rate of 1°C / min under air conditions. The temperature was raised to 400°C, kept for 1 hour, and then cooled at room temperature to obtain powder of cobalt tetroxide double-layer hollow spheres;
[0039] (2) Cobalt tetroxide double-layer hollow sphere-carbon nanotube-sulfur composite material: the cob...
Embodiment 3
[0041] The preparation method of the lithium-sulfur battery cathode material includes the following steps:
[0042] (1) Preparation of cobalt tetroxide double-layer hollow spheres: after dissolving 20g of glucose and 10g of cobalt nitrate in 200mL of deionized water, place in a reaction kettle to carry out hydrothermal reaction at 200 ° C for 24 hours, and after the reaction is completed, the suspension is obtained by cooling at room temperature The obtained suspension was centrifuged, the product was collected, washed three times with deionized water, and dried at 60°C to obtain powder; then the obtained powder was placed in a muffle furnace, and the temperature was increased at a rate of 5°C / min under air conditions. The temperature is raised to 600°C, kept for 2 hours, and then cooled at room temperature to obtain powder of cobalt tetroxide double-layer hollow spheres;
[0043] (2) Cobalt tetroxide double-layer hollow sphere-carbon nanotube-sulfur composite material: the co...
PUM
| Property | Measurement | Unit |
|---|---|---|
| diameter | aaaaa | aaaaa |
| diameter | aaaaa | aaaaa |
| diameter | aaaaa | aaaaa |
Abstract
Description
Claims
Application Information
Login to View More