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A kind of single crystal material precursor and compound oxide powder and its preparation method and application

A technology of single crystal materials and precursors, applied in the field of materials, can solve the problems of environmental burden and high DCR of lithium-ion batteries, and achieve an environmentally friendly effect

Active Publication Date: 2022-05-24
XTC NEW ENERGY MATERIALS(XIAMEN) LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the defect that the DCR of the lithium-ion battery corresponding to the precursor obtained by the existing co-precipitation crystallization method is high and will cause a huge burden on the environment, and to provide a method that can reduce the DCR of the lithium-ion battery and will not affect the environment. Single crystal material precursor and composite oxide powder with environmental burden, preparation method and application thereof

Method used

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  • A kind of single crystal material precursor and compound oxide powder and its preparation method and application
  • A kind of single crystal material precursor and compound oxide powder and its preparation method and application

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Effect test

Embodiment 1

[0034] S1, the metal mixture (Ni, Co, Mn, Al four kinds of metals are mixed in molar ratio of 1:1:1:0.01), nitric acid, high-purity water according to the molar ratio of 10:1:1 and simultaneously add the pre-added concentration of 50g 2g / L of ammonium sulfate was added to the reactor of sodium chloride aqueous solution of / L at the same time. Under normal pressure conditions, the ORP value of redox potential was controlled at -1000mv, the conductivity was controlled at 20000uS / cm, and the concentration of complexing agent was controlled at -1000mv. Controlled at 15g / L, stirring input power controlled at 3.5kw / m 3 h, the metal ion concentration is controlled at 30g / L, the pH value is controlled at 8.5, and the reaction temperature is controlled at 60°C for chemical corrosion and crystallization reaction for 40h, the particle size d50 grows to 1μm, and then passes through at a rate of 10L / h. Enter the oxidant air, control the redox potential at -800mv, use a spectrometer to moni...

Embodiment 2

[0038] S1, the metal mixture (the five metals of Ni, Co, Mn, Al, Zr are mixed in a molar ratio of 7:1:3:0.006:0.003), nitric acid, and high-purity water are added in parallel according to the molar ratio of 10:1:2. In the reactor of the sodium chloride aqueous solution with a good concentration of 40g / L, 30g / L of ammonium sulfate was added at the same time. The concentration of complexing agent is controlled at 50g / L, and the stirring input power is controlled at 3.0kw / m 3 h, the metal ion concentration is controlled at 35g / L, the pH value is controlled at 9.0, and the reaction temperature is controlled at 60°C for 24h chemical corrosion crystallization reaction, the particle size d50 grows to 1.5μm, and then at a rate of 30L / h The oxidant air was introduced, the ORP value of the redox potential was controlled at -400mv, and the color of the material was monitored by a color spectrometer. The material continued to stay in the reactor for 80h, and the crystallization process co...

Embodiment 3

[0042]S1, the metal mixture (Ni, Co, Mn, Mg five kinds of metals are mixed in molar ratio 6:2:2:0.002), nitric acid, high-purity water according to the molar ratio of 10:1:1.5 and simultaneously add the pre-added concentration of 90g 10g / L of ammonium sulfate was added to the reactor of sodium sulfate aqueous solution at the same time. Under normal pressure conditions, the ORP value of the redox potential was controlled at -500mv, the conductivity was controlled at 1000uS / cm, and the concentration of the complexing agent was controlled at At 30g / L, the stirring input power is controlled at 3.0kw / m 3 h, the metal ion concentration is controlled at 35g / L, the pH value is controlled at 9.0, and the reaction temperature is controlled at 60°C for chemical corrosion and crystallization reaction for 48h, the particle size d50 grows to 2μm, and then passes through at a rate of 30L / h. Enter the oxidant air, control the ORP value of the redox potential at 0mv, use a spectrometer to moni...

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Abstract

The invention belongs to the field of materials, and relates to a single crystal material precursor and composite oxide powder, a preparation method and application thereof. The single crystal material precursor includes an inner core and an outer shell covering the surface of the inner core, the inner core is composed of a divalent metal hydroxide, and the outer shell is composed of a divalent metal hydroxide and a trivalent metal hydrogen A mixture of oxides, the proportion of trivalent metal hydroxide in the single crystal material precursor is less than 10%. The single crystal material precursor obtained by the method provided by the invention can reduce the DCR of the lithium-ion battery. Compared with the co-precipitation method, the present invention adopts the chemical corrosion crystallization method to prepare the single crystal material precursor. Water is used as a raw material to participate in the reaction, and water is continuously consumed without The generation of excess waste water can achieve the purpose of being friendly to the environment.

Description

technical field [0001] The invention belongs to the field of materials, and relates to a single crystal material precursor and a composite oxide powder and a preparation method and application thereof. Background technique [0002] With the application of composite multi-component lithium-ion batteries in electric vehicles, the research direction of composite multi-component lithium-ion battery cathode materials has diversified: high capacity, high voltage, single crystal, polycrystalline, etc. Composite multi-component materials have become a research hotspot, especially in 2017. Since then, the technology of multi-element single crystal materials has become increasingly mature and has been widely promoted in the automotive field. Single crystal materials have now become the mainstream direction of the domestic market. Both medium and high nickel materials have opened the single crystal route, and the market demand is increasing day by day. [0003] With the rapid developme...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/525C01G53/00H01M4/485H01M4/505H01M10/0525
CPCC01G53/006H01M4/505H01M4/525H01M4/485H01M10/0525C01P2006/40C01P2004/61C01P2004/03Y02E60/10
Inventor 马跃飞李权余康杰
Owner XTC NEW ENERGY MATERIALS(XIAMEN) LTD
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