Lithium ion battery porous LiMn2O4 cathode material and the preparation method thereof
A technology of lithium ion battery and positive electrode material, applied in the field of lithium ion battery LiMn2O4 positive electrode material and its preparation, can solve the problems of high cost and difficulty in mass production, and achieve the effects of high specific capacity, stable cycle performance and good rate performance.
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
Example Embodiment
[0025] Example 1
[0026] First, dissolve the stoichiometric ratio of manganese nitrate and lithium nitrate (ie, the molar ratio of manganese nitrate: lithium nitrate is 2:1) in ethanol, add polystyrene particles with a particle size of 100 nm to them, stir and remove the solvent to obtain a powder Slowly increase the temperature to 700°C and calcinate for 3 hours. After cooling to room temperature, remove and grind, sieving to obtain porous LiMn 2 O 4 . See the attached X-ray diagram Figure 4 (b) Relative to the X-ray image of Comparative Example 1, the X-ray image of Example 1 shows that LiMn 2 O 4 Good spinel structure with a small amount of Mn 2 O 3 Impure, SEM and TEM are shown in the attached figure 1 with 2 , Indicating a porous structure.
Example Embodiment
[0027] Example 2
[0028] First, dissolve the stoichiometric ratio of manganese nitrate and lithium nitrate (ie, the molar ratio of manganese nitrate to lithium nitrate is 2:1) in a mixture of ethanol and water, add polystyrene particles with a particle size of 10 nm to the mixture, stir to remove After solvent, the obtained powder is slowly heated to 500°C and calcined for 3 hours. After cooling to room temperature, it is taken out and ground, sieved to obtain porous LiMn 2 O 4 . See the X-ray chart Figure 4 (a) Relative to the X-ray diagram of Comparative Example 1, the X-ray diagram of Example 2 also shows the hole-like LiMn 2 O 4 Good spinel structure, but its strength is weaker than that of Example 1, and contains a small amount of Mn 2 O 3 Impure.
Example Embodiment
[0029] Example 3
[0030] First, dissolve the stoichiometric ratio of manganese acetate and lithium acetate in water, and make the concentration of the two acetates reach 0.3M, then add polymethyl methacrylate with a particle size of 500nm to the solution, stir, and then remove the solvent , After grinding, calcining at 500℃ for 3 hours, after cooling to room temperature, remove and grind, sieving, you can get LiMn 2 O 4 . The scanning electron microscope image shows the same hole-like structure.
PUM
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.
© 2023 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap