Composite material, preparation method of composite material, and lithium ion battery comprising composite material
A composite material, lithium source technology, applied in battery electrodes, secondary batteries, circuits, etc., can solve the problems of organic consumption, increased cost, and insufficient connection, achieving obvious cost-effective advantages, improved pressure resistance, and good consistency Effects of Sex and Uniformity
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
Example Embodiment
[0043] Example 1
[0044] The embodiment of the present invention provides a composite material. The composite material has a multilayer core-shell structure. The shell layer of the composite material includes an intermediate layer and an outer layer covering the intermediate layer. The core of the composite material is Li(Ni x Co y Al z )O 2 , The middle layer is Li(Ni 1 / 3 Co 1 / 3 Mn 1 / 3 )O 2 , The outer layer is LiNi 0.5 Mn 1.5 O 4 , The molar ratio of the inner core, middle layer, and outer layer of the composite material is a:b:c, where a+b+c=1, 0
[0045] The composite material provided by the embodiment of the present invention has a multi-layer core-shell structure, the core is selected from NCA material, the middle shell layer is selected from NCM material, and the outer shell layer is selected from spinel lithium nickelate material. Because the shell material itself has a certain capacity, coating on the high-capacity core m...
Example Embodiment
[0047] Example 2
[0048] The embodiment of the present invention provides a preparation method of a composite material, the preparation method includes:
[0049] Step 1: A composite material precursor with a core-shell structure is obtained sequentially by co-precipitation reaction. The shell layer of the composite material precursor includes an intermediate layer and an outer layer covering the intermediate layer. The core of the composite material precursor is (Ni x Co y Al z )(OH) 2 , The middle layer is (Ni 1 / 3 Co 1 / 3 Mn 1 / 3 )(OH) 2 , The outer layer is Ni 0.25 Mn 0.75 (OH) 2 ;
[0050] Step 2: The composite material precursor and the lithium source are uniformly mixed in a molar ratio of 1:1 to 1.1, then roasted, and then cooled, crushed, and sieved to obtain an inner core of Li(Ni x Co y Al z )O 2 , The middle layer is Li(Ni 1 / 3 Co 1 / 3 Mn 1 / 3 )O 2 , The outer layer is LiNi 0.5 Mn 1.5 O 4 The composite material, the molar ratio of the inner core, middle layer and outer layer of...
Example Embodiment
[0068] Example 3
[0069] Prepare 9L Ni, Co, Al nitrate solution A with a concentration of 1mol / L, wherein the molar ratio of Ni, Co, Al is 0.8:0.15:0.05; prepare 0.05L Ni, Co, Mn nitric acid with a concentration of 1mol / L Salt solution B, in which the molar ratio of Ni, Co, and Mn is 1:1:1; prepare 1 L of Ni, Mn nitrate solution C with a concentration of 1 mol / L, where the molar ratio of Ni to Mn is 0.25:0.75; Prepare a sufficient amount of 6mol / L NaOH alkali solution.
[0070] Inject solution A at a rate of 1L / h into a reactor with a rotation speed of 200rps, and at the same time inject 6mol / L NaOH alkali solution, keep the pH value in the reactor between 10-11, after the solution A is added dropwise, Immediately add solution B gradually to the reactor at a rate of 0.5L / h. After 0.1h, solution B is completely injected into the reactor, and then immediately add solution C to the reactor at a rate of 0.5L / h, and solution C is dripped After the addition is complete, the reaction i...
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.
© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap