Strontium-doped battery quaternary positive electrode material precursor and preparation method thereof

A positive electrode material, strontium doping technology, applied in battery electrodes, electrical components, secondary batteries, etc., can solve the problems of large precursor particle size and complex process, and achieve simple preparation methods, less environmental pollution, and low production costs Effect

Inactive Publication Date: 2021-08-13
ZHUJI PAWA NEW ENERGY
View PDF8 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The method is complex and the particle size of the obtained precursor is relatively large

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Strontium-doped battery quaternary positive electrode material precursor and preparation method thereof
  • Strontium-doped battery quaternary positive electrode material precursor and preparation method thereof
  • Strontium-doped battery quaternary positive electrode material precursor and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] The chemical formula of the precursor of the battery quaternary positive electrode material doped with strontium in this example is Ni 0.9 co 0.04 mn 0.04 Al 0.020 Sr 0.001 (OH) 2 .

[0031] The strontium-doped battery quaternary cathode material precursor Ni in this embodiment 0.9 co 0.04 mn 0.04 Al 0.020 Sr 0.001 (OH) 2 The preparation method comprises the following steps:

[0032] (1) 9mol NiSO 4 ·6H 2 O, 0.4mol CoSO 4 ·7H 2 O, 0.4mol MnSO 4 ·H 2 O and 0.2molAlSO 4 Add it into the first reaction kettle, mix well, and then use a metering pump to mix 4.5L 4.5mol / L NaOH solution and 5L7mol / L NH 3 ·H 2 Add the O solution into the first reaction kettle, stir evenly, adjust the temperature of the solution to 55° C., and the pH value to 11.00 to obtain a mixed solution;

[0033] (2) 3L 0.3mol / L ammonia water and 0.005L 2mol / L Sr(OH) preheated to 50°C 2 Add the solution into the second reaction kettle, stir evenly, then import the mixed solution obtained...

Embodiment 2

[0037] The chemical formula of the precursor of the battery quaternary positive electrode material doped with strontium in this example is Ni 0.92 co 0.03 mn 0.03 Al 0.020 Sr 0.002 (OH) 2 .

[0038] The strontium-doped battery quaternary cathode material precursor Ni in this embodiment 0.92 co 0.03 mn 0.03 Al 0.020 Sr 0.002 (OH) 2 The preparation method comprises the following steps:

[0039] (1) 9.2mol NiSO 4 ·6H 2 O, 0.3mol CoSO 4 ·7H 2 O, 0.3mol MnSO 4 ·H 2 O and 0.2molAlSO 4 Add it into the first reaction kettle, mix well, and then use a metering pump to mix 3.4L 6mol / L NaOH solution and 5.5L 6mol / L NH 3 ·H 2 Add the O solution into the first reaction kettle, stir evenly, adjust the temperature of the solution to 50° C. and the pH value to 11.50 to obtain a mixed solution;

[0040] (2) Mix 3L 0.28mol / L ammonia water and 0.01L 2mol / L Sr(OH) preheated at 50°C 2 Add the solution into the second reaction kettle, stir evenly, then add the mixed solution obt...

Embodiment 3

[0044] The chemical formula of the precursor of the battery quaternary positive electrode material doped with strontium in this example is Ni 0.9 co 0.04 mn 0.04 Al 0.020 Sr 0.003 (OH) 2 .

[0045] The strontium-doped battery quaternary cathode material precursor Ni in this embodiment 0.9 co 0.04 mn 0.04 Al 0.020 Sr 0.003 (OH) 2 The preparation method comprises the following steps:

[0046] (1) 9mol NiSO 4 ·6H 2 O, 0.4mol CoSO 4 ·7H 2 O, 0.4mol MnSO 4 ·H 2 O and 0.2molAlSO 4 Add it into the first reaction kettle, mix well, and then use a metering pump to mix 3.7L 5.5mol / L NaOH solution and 6L 5.5mol / L NH 3 ·H 2 Add the O solution into the first reaction kettle, stir evenly, adjust the temperature of the solution to 55° C. and the pH value to 11.30 to obtain a mixed solution;

[0047] (2) Mix 4L 0.19mol / L ammonia water and 0.01L 3mol / L Sr(OH) preheated at 50°C 2 Add the solution into the second reaction kettle, stir evenly, then add the mixed solution obtai...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
Concentrationaaaaaaaaaa
Concentrationaaaaaaaaaa
Concentrationaaaaaaaaaa
Login to view more

Abstract

Provided are a strontium-doped battery quaternary positive electrode material precursor and a preparation method thereof. The chemical formula of the strontium-doped battery quaternary positive electrode material precursor is NixCoyMnzAlpSrq (OH) 2, wherein x is larger than or equal to 0.6 and smaller than 1, y is larger than 0 and smaller than or equal to 0.2, z is larger than 0 and smaller than or equal to 0.2, p is larger than 0 and smaller than or equal to 0.1, q is larger than 0 and smaller than or equal to 0.05, and x + y + z + p = 1. The preparation method comprises the following steps of: (1) adding NiSO4. 6H2O, CoSO4. 7H2O, MnSO4.H2O and AlSO4 into a first reaction kettle, and then adding a NaOH solution and a NH3.H2O solution into the first reaction kettle to obtain a mixed solution; (2) adding preheated ammonia water and a Sr (OH) 2 solution into a second reaction kettle, then adding the mixed solution into the second reaction kettle, and carrying out a co-precipitation reaction to obtain a solid-liquid mixture; and (3) carrying out solid-liquid separation on the solid-liquid mixture, and washing, drying, sieving and demagnetizing the obtained solid to obtain the precursor. The surface of the strontium-doped battery quaternary positive electrode material precursor is free of cracks, and the particle size is 2.5-6 microns; and the content of the aluminum element does not need to be strictly controlled, and the preparation method is simple to operate and low in production cost.

Description

technical field [0001] The invention relates to a battery positive electrode material precursor and a preparation method thereof, in particular to a strontium-doped battery quaternary positive electrode material precursor and a preparation method thereof. Background technique [0002] The ternary cathode materials NCA and NCM have become strong contenders for the next generation of high specific energy lithium-ion battery cathode materials due to their high capacity characteristics. However, as the price of the scarce resource metal cobalt and its compounds increases, the production cost of the ternary cathode material further increases. The quaternary positive electrode material lithium nickel cobalt manganese aluminate (NCMA) is a new type of positive electrode material, and the NCMA battery refers to a battery that uses the quaternary positive electrode material NCMA as the positive electrode. The nickel content of the quaternary cathode material NCMA is nearly 90%, whic...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): H01M4/485H01M4/505H01M4/525H01M10/0525H01M10/42
CPCH01M4/485H01M4/505H01M4/525H01M10/0525H01M10/4235Y02E60/10
Inventor 张宝邓鹏林可博周亚楠丁瑶
Owner ZHUJI PAWA NEW ENERGY
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

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