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Nickel-cobalt-manganese composite hydroxide added with hexavalent elements and preparation method of nickel-cobalt-manganese composite hydroxide

A technology of composite hydroxide and hexavalent elements, which is applied in the field of nickel-cobalt-manganese composite hydroxide and its preparation, can solve the problems of uneven doping of hexavalent elements and easily broken particles, and achieve crystal lattice stability and element distribution Uniform, safety-enhancing effect

Active Publication Date: 2020-04-03
HUAYOU NEW ENERGY TECH (QUZHOU) CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] The second object of the present invention is to overcome the problems of uneven doping of hexavalent elements and easily broken particles in nickel-cobalt-manganese hydroxide, and obtain a precursor with uniform element distribution and good sphericity by liquid phase synthesis

Method used

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  • Nickel-cobalt-manganese composite hydroxide added with hexavalent elements and preparation method of nickel-cobalt-manganese composite hydroxide
  • Nickel-cobalt-manganese composite hydroxide added with hexavalent elements and preparation method of nickel-cobalt-manganese composite hydroxide
  • Nickel-cobalt-manganese composite hydroxide added with hexavalent elements and preparation method of nickel-cobalt-manganese composite hydroxide

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Effect test

Embodiment 1

[0046] The chemical formula is Ni 0.6 co 0.2 mn 0.2 (OH) 1.98 (MoO 4 ) 0.01 , D50=8.9μm Preparation method of nickel-cobalt-manganese composite hydroxide with hexavalent molybdenum added:

[0047] Step 1, according to the molar ratio of nickel, cobalt, manganese and hexavalent molybdenum in the nickel-cobalt-manganese hydroxide that needs to add hexavalent molybdenum, that is, 0.6:0.2:0.2:0.01, select nickel sulfate, cobalt sulfate, sulfuric acid Manganese and molybdenum trioxide are raw materials;

[0048] Step 2, nickel sulfate, cobalt sulfate, manganese sulfate and pure water selected in step 1 are mixed with a mixed salt solution whose total metal ion concentration is 2.0mol / L;

[0049] Step 3, preparation concentration is 5.0 mol / L sodium hydroxide solution;

[0050] Step 4, dissolving the molybdenum trioxide selected in step 1 into the sodium hydroxide solution prepared in step 3 until clarification without precipitation, obtaining a sodium hydroxide solution cont...

Embodiment 2

[0060] The chemical formula is Ni 0.34 co 0.33 mn 0.33 (OH) 1.994 (WO 4 ) 0.003 , D50=2.6μm Preparation method of nickel-cobalt-manganese composite hydroxide with hexavalent tungsten added:

[0061] Step 1, according to the molar ratio of nickel, cobalt, manganese and hexavalent tungsten element in the nickel-cobalt-manganese hydroxide to which hexavalent tungsten element needs to be added, that is, 0.34:0.33:0.33:0.003, nickel sulfate, cobalt sulfate, sulfuric acid Manganese and ammonium tungstate are raw materials;

[0062] Step 2, nickel sulfate, cobalt sulfate, manganese sulfate and pure water selected in step 1 are mixed with a mixed salt solution whose total metal ion concentration is 2.0mol / L;

[0063] Step 3, preparation concentration is 10.0 mol / L sodium hydroxide solution;

[0064] Step 4, dissolving the ammonium tungstate selected in step 1 into the sodium hydroxide solution prepared in step 3 until it is clear and free of precipitation, to obtain a sodium hy...

Embodiment 3

[0074] The chemical formula is Ni 0.6 co 0.2 mn 0.2 (OH) 1.98 (WO 4 ) 0.01 , D50=8.9μm Preparation method of nickel-cobalt-manganese composite hydroxide with hexavalent tungsten added:

[0075] Step 1, according to the molar ratio of nickel, cobalt, manganese and hexavalent tungsten element in the nickel-cobalt-manganese hydroxide to which hexavalent tungsten element needs to be added, that is, 0.6:0.2:0.2:0.01, nickel sulfate, cobalt sulfate, sulfuric acid Manganese and ammonium tungstate are raw materials;

[0076] Step 2, nickel sulfate, cobalt sulfate, manganese sulfate and pure water selected in step 1 are mixed with a mixed salt solution whose total metal ion concentration is 2.0mol / L;

[0077] Step 3, preparation concentration is 5.0 mol / L sodium hydroxide solution;

[0078] Step 4, dissolving the ammonium tungstate selected in step 1 into the sodium hydroxide solution prepared in step 3 until it is clear and free of precipitation, to obtain a sodium hydroxide so...

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Abstract

The invention relates to a nickel-cobalt-manganese composite hydroxide added with hexavalent elements and a preparation method of the nickel-cobalt-manganese composite hydroxide. The nickel-cobalt-manganese composite hydroxide added with the hexavalent elements is represented by a general formula NixCoyMnz (OH) 2-2a (MO4) a, wherein x is greater than or equal to 0.30 and less than or equal to 0.92, y is greater than or equal to 0.08 and less than or equal to 0.40, z is greater than or equal to 0.02 and less than or equal to 0.50, a is greater than or equal to 0.001 and less than or equal to 0.02, x + y + z is equal to 1, and M is an added hexavalent element and represents one or a combination of molybdenum and tungsten; according to the invention, a hexavalent element-containing compound is dissolved into an alkaline solution to form a mixed alkaline solution, so atomic-scale mixing of nickel, cobalt, manganese and hexavalent elements is achieved, the internal structure of the nickel-cobalt-manganese composite hydroxide is stabilized through introduction of the hexavalent elements, and the obtained nickel-cobalt-manganese composite hydroxide added with the hexavalent elements has the advantages of being uniform in element distribution, good in dispersity and sphericity degree and stable in crystal lattice.

Description

technical field [0001] The invention belongs to the technical field of precursors of cathode materials for lithium ion batteries, in particular to a nickel-cobalt-manganese composite hydroxide added with hexavalent elements and a preparation method thereof. Background technique [0002] As a new type of green power source, lithium-ion batteries have been widely used in 3C digital electronic products, power tools, electric vehicles, energy storage and other fields. One of the key factors determining the electrochemical performance of lithium-ion batteries is the cathode material. Several cathode materials commonly used at present include lithium manganese oxide, lithium cobalt oxide, lithium iron phosphate, nickel cobalt lithium manganese oxide, etc. Due to the obvious synergistic effect among Ni, Co, and Mn, NMC has better performance than single-component layered cathode materials, and is considered to be one of the most promising new cathode materials. Due to its good co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/36H01M4/485H01M4/505H01M4/525H01M10/0525C01G45/02C01G51/04C01G53/00C01G53/04
CPCC01G45/02C01G51/04C01G53/006C01G53/04C01P2004/03C01P2004/51H01M4/362H01M4/485H01M4/505H01M4/525H01M10/0525Y02E60/10
Inventor 邱天李肖萌周恒朱玉华高炯信沈震雷周勤俭陈要忠
Owner HUAYOU NEW ENERGY TECH (QUZHOU) CO LTD
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