Preparation methods of microcrystal graphite cathode electrode plate and button lithium battery
A microcrystalline graphite and negative electrode technology, which is applied in the manufacture of electrolyte batteries, non-aqueous electrolyte batteries, battery electrodes, etc., can solve the problems of poor electrical properties of natural microcrystalline graphite, achieve good stability, reduce usage, increase The effect of specific surface area
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
Example Embodiment
[0054] Example 1
[0055] This embodiment provides a method for preparing microcrystalline graphite for lithium battery anode materials, which includes the following steps:
[0056] S1. Raw ore treatment: crush the Lutang cryptocrystalline graphite, and then deep-grind the microcrystalline graphite raw ore, and obtain a material with a fineness of -0.074mm through grinding, and a material content of -0.074mm for grinding fineness 90% of the original ore samples are subjected to flotation, specifically as figure 1 As shown, one rough selection, four selections and one sweep selection process are adopted, followed by drying and magnetic separation to obtain microcrystalline graphite with a fixed carbon content of 90%;
[0057] Among them, the properties of Lutang cryptocrystalline graphite described in step S1 are as follows: moisture 2.4%, volatile matter 2.99%, ash 18.37%, carbon content 78.64%, and specific surface area 12.8 square meters / g.
[0058] S2. Acid leaching and purificatio...
Example Embodiment
[0061] Example 2
[0062] This implementation is basically the same as Embodiment 1, except that the process conditions in step S2 are different, which are specifically as follows:
[0063] S2. Acid leaching and purification: mixing the microcrystalline graphite obtained in step S1 with a mixed acid, the mixed acid is a mixed acid of HF and HCL, the liquid-to-solid ratio of the mixed acid to graphite is 2ml / g, the volume content of HF is 30%, and the The volume content is 10%, and then the normal pressure acid leaching is carried out at a temperature of 60°C and a reaction time of 1h. The leaching residue is washed with distilled water or deionized water until the graphite is precipitated when the washing solution is neutral, and then filtered at a temperature of 80 Drying at ~150℃ for 2~3h to obtain purified microcrystalline graphite with fixed carbon content of 99.12%.
Example Embodiment
[0064] Example 3
[0065] This implementation is basically the same as Embodiment 1, except that the process conditions in step S2 are different, which are specifically as follows:
[0066] S2. Acid leaching and purification: mixing the microcrystalline graphite obtained in step S1 with a mixed acid, the mixed acid is a mixed acid of HF and HCL, the liquid-solid ratio of the mixed acid to graphite is 3.5 ml / g, the volume content of HF is 60%, and the HCL The volume content is 20%, and then the normal pressure acid leaching is carried out at a temperature of 80°C and a reaction time of 4h. The leaching residue is washed with distilled water or deionized water until the graphite is precipitated when the washing solution is neutral, and then filtered and the temperature is Drying at 80-150°C for 2 to 3 hours obtains purified microcrystalline graphite with a fixed carbon content of 99.56%.
PUM
Property | Measurement | Unit |
---|---|---|
Reversible specific capacity | aaaaa | aaaaa |
Specific surface area | aaaaa | aaaaa |
Specific surface area | 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