Lithium-sulfur battery based on functional carbon fiber cloth as positive electrode barrier layer
A carbon fiber cloth and lithium-sulfur battery technology, applied in the field of electrochemical batteries, can solve problems such as inconvenience in large-scale production, defects in preparation and operation, and complex preparation, and achieve significant value, good application prospects, and the effect of improving specific capacity.
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
Embodiment 1
[0028] Preparation method of sulfur-containing positive electrode:
[0029] Sulfur powder is a sulfur-containing active material, conductive carbon black (Super-P) is a conductive agent, and PVDF (5%) NMP solution is a binder, and are mixed at a mass ratio of 4:5:1. After the materials were mixed, they were placed on a magnetic stirrer and stirred at a medium speed for 12 h. After the stirring is completed, the obtained viscous slurry is coated on the aluminum foil of the current collector, and then dried in a vacuum oven at 60° C. for 12 hours, and weighed for later use.
[0030] Pretreatment of carbon fiber cloth:
[0031] The carbon fiber cloth was ultrasonically soaked and washed with 10% dilute nitric acid, deionized water and ethanol for 20 min, respectively. It was then dried in a vacuum oven at 50°C for 12 hours. Finally, the carbon fiber cloth was cleaned with a plasma cleaning machine. During the cleaning process, the working voltage was set to 700V, and the oxyge...
Embodiment 2
[0039] The pretreatment of the carbon fiber cloth barrier layer and the preparation method of the sulfur-containing positive electrode are the same as in Example 1.
[0040] Preparation of functional carbon fiber cloth barrier layer:
[0041] According to titanium hydroxide (Ti(OH) 4 ) and carbon fiber cloth at a mass ratio of 1:8 to weigh titanium hydroxide, mix titanium hydroxide and PVDF (5%) NMP solution at a mass ratio of 4:1, and stir for 5 hours at a medium speed. After the slurry reaches an appropriate viscosity, it is coated on carbon fiber cloth and dried in a vacuum oven at 40°C for 24 hours to obtain a functional carbon fiber cloth. Then the functional carbon fiber cloth was cut into 12mm discs, weighed and vacuum dried again.
[0042] When the battery is assembled, the battery without the functional carbon fiber cloth barrier layer without the sulfur-containing positive electrode and the battery without the functional carbon fiber cloth barrier layer with the su...
Embodiment 3
[0045] The pretreatment of the carbon fiber cloth barrier layer is consistent with Example 1.
[0046] Preparation method of sulfur-containing positive electrode:
[0047] Sulfur powder is a sulfur-containing active material, acetylene black is a conductive agent, and PVDF (5%) NMP solution is a binder, mixed at a mass ratio of 7:2:1. After the materials were mixed, they were placed on a magnetic stirrer and stirred at a medium speed for 12 h. After the stirring is completed, the obtained viscous slurry is coated on the aluminum foil of the current collector, and then dried in a vacuum oven at 60° C. for 12 hours, and weighed for later use.
[0048] Preparation of functional carbon fiber cloth barrier layer:
[0049] Cobalt tetroxide (Co 3 o 4 ) was ultrasonically dispersed in ethanol to obtain a suspension. And under vacuum filtration, compound tricobalt tetroxide and carbon fiber cloth at a mass ratio of 1:5, and dry in a vacuum oven at 60°C for 16 hours to obtain funct...
PUM
| Property | Measurement | Unit |
|---|---|---|
| thickness | aaaaa | aaaaa |
| diameter | aaaaa | aaaaa |
| current efficiency | aaaaa | aaaaa |
Abstract
Description
Claims
Application Information
Login to View More