Composite cathode material used for lithium-sulfur battery and having high-rate performance and preparation method
A composite cathode material, lithium-sulfur battery technology, applied in battery electrodes, non-aqueous electrolyte battery electrodes, circuits, etc., can solve problems such as not being well solved, and achieve reduced loss of active materials, excellent rate performance, and improved rate performance. The effect of cycle performance
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
Example Embodiment
[0039] Example 1
[0040] The preparation method of the mesoporous carbon material / sulfur composite cathode material is as follows:
[0041] 1) Use porous multi-walled carbon nanotubes (h-CNT) as conductive carbon material (C), weigh 0.2g; electrochemically active substance sulfur (S), weigh 0.2g;
[0042] 2) Preparation by melting method. Pour the sulfur weighed in step 1) into the weighed porous multi-walled carbon nanotubes (h-CNT). The setting conditions of the melting method are: N 2 Under the atmosphere of protective gas, the air flow rate is set to 50mL / min. Under aeration conditions, let it stand for 30 minutes to discharge the air in the tube furnace. After that, it is raised to 155°C at 100°C, kept for 10h, and then cooled naturally to obtain porous Wall carbon nanotube / sulfur composite cathode material (h-CNT / S).
[0043] The methods for preparing the positive electrode sheet, assembling the battery, and testing the battery are the same as in the comparative example. by f...
Example Embodiment
[0044] Example 2
[0045] A composite cathode material for lithium-sulfur batteries with high rate performance. It consists of conductive agent, electrochemically active material sulfur and modifier ZrO 2 The conductive agent is porous multi-walled carbon nanotubes (h-CNT), the electrochemically active substance sulfur is dispersed in the pores of the porous multi-walled carbon nanotubes, and the modifier is connected to the mesoporous carbon material through chemical bonding . Among them, the amount of each composition is calculated by mass percentage as: conductive agent 50wt%, electrochemically active material 49.95wt%, modifier 0.05wt%.
[0046] The method for preparing the composite cathode material of the high-rate performance lithium-sulfur battery, the specific steps are as follows:
[0047] 1) Use porous multi-walled carbon nanotubes (h-CNT) as conductive carbon material, weigh 0.2g; electrochemically active substance sulfur, weigh 0.198g;
[0048] 2) Preparation by melting ...
Example Embodiment
[0053] Example 3
[0054] A composite cathode material for lithium-sulfur batteries with high rate performance. It consists of conductive agent, electrochemically active material sulfur and modifier ZrO 2 The conductive agent is porous multi-walled carbon nanotubes (h-CNT), the electrochemically active substance sulfur is dispersed in the pores of the porous multi-walled carbon nanotubes, and the modifier is connected to the mesoporous carbon material through chemical bonding . Among them, the amount of each composition in terms of mass percentage is: conductive agent 51wt%, electrochemically active material 48.88wt%, modifier 0.12wt%.
[0055] The preparation of the composite positive electrode material, the preparation of the positive electrode sheet, the battery assembly and the battery test methods in this example are the same as in Example 2. The battery charge and discharge test results show that the battery prepared in this example is charged for the first time at a rate of ...
PUM
Property | Measurement | Unit |
---|---|---|
Thickness | aaaaa | aaaaa |
Abstract
Description
Claims
Application Information
- R&D Engineer
- R&D Manager
- IP Professional
- Industry Leading Data Capabilities
- Powerful AI technology
- Patent DNA Extraction
Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.
© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap