Positive active material and preparation method thereof
A positive electrode active material and a technology of positive electrode materials, applied in the field of positive electrode active materials and their preparation, can solve the problems of poor cycle performance and low initial discharge efficiency, and achieve improved cycle performance, simple and easy preparation method, and improved charge and discharge efficiency Effect
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
Example Embodiment
[0024] A method for preparing the above-mentioned positive electrode material includes the following steps:
[0025] (1) Go to step S: Add solution A and solution C co-currently to the bottom solution for precipitation, until the nickel ion in the bottom solution is less than 2000ppm; then add solution B and solution C co-currently into the bottom solution for precipitation, and wait until the bottom solution Nickel ion is less than 2000ppm;
[0026] Repeat step S, and the number of repetitions is not less than 5 times; during the precipitation process, control the pH in the bottom solution to 10.5 to 12.0;
[0027] Solution A is a solution containing nickel ions, cobalt ions, and manganese ions, and solution B is a solution of nickel ions, cobalt ions, and doped ions; the concentration ratio of nickel ions to cobalt ions in the solution A and solution B is the same;
[0028] Solution C is an alkaline solution, and the bottom solution is a complexing agent solution;
[0029] (2) After ...
Example Embodiment
[0059] Example 1 Best Example
[0060] Solution A: Dissolve nickel sulfate, cobalt sulfate and manganese sulfate in water to make a solution, where Ni 2+ , Co 2+ , Mn 2+ The concentration is 2 / 3mol / L
[0061] Solution B: Dissolve nickel sulfate, cobalt sulfate and magnesium sulfate in water to make a solution, where Ni 2+ , Co 2+ , Mg 2+ The concentration is 2 / 15mol / L
[0062] Solution C: 5.6mol / L NaOH, 4.8mol / L NH 3 ·H 2 O mixed solution
[0063] Base solution: 2.0mol / L NH 3 ·H 2 O
[0064] Pour 20L of bottom liquid into a 100L reactor, and pour nitrogen into the reactor to expel oxygen in the bottom liquid. And continue to introduce nitrogen to ensure the inert atmosphere in the reactor.
[0065] Add 2.8L solution A and solution C co-currently into the reactor to detect Ni in the bottom liquid 2+ , Until less than 2000ppm. Then add 1.1L of solution B and solution C co-currently into the reactor to detect Ni in the bottom liquid 2 Less than 2000ppm. Repeat the above steps 13 times.
...
Example Embodiment
[0070] Example 2
[0071] The difference from Example 1 is that solution B is made by dissolving nickel sulfate, cobalt sulfate and aluminum manganate in water, where Ni 2+ , Co 2+ , Al 3+ The concentration is 2 / 15mol / L.
[0072] The other parts are the same as in Example 1.
[0073] A positive electrode material was prepared, denoted as S2.
PUM
Property | Measurement | Unit |
---|---|---|
The average particle size | 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