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Vanadium-doped nickel-manganese composite hydroxide and preparation method thereof

A composite hydroxide and manufacturing method technology, applied in electrochemical generators, electrical components, battery electrodes, etc., can solve the problems of uneven doping of vanadium, easy broken particles, etc., achieve uniform distribution of elements, increase specific capacity, Overcome the effect of uneven doping

Inactive Publication Date: 2020-03-31
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

[0013] The second object of the present invention is to overcome the problems of uneven doping of vanadium and easily broken particles in nickel-manganese hydroxide, and obtain a precursor with uniform vanadium element distribution and good sphericity by liquid phase synthesis

Method used

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  • Vanadium-doped nickel-manganese composite hydroxide and preparation method thereof
  • Vanadium-doped nickel-manganese composite hydroxide and preparation method thereof
  • Vanadium-doped nickel-manganese composite hydroxide and preparation method thereof

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Effect test

Embodiment 1

[0046] The chemical formula is Ni 0.25 mn 0.75 V 0.01 (OH) 2.05 The preparation method of the nickel-manganese composite hydroxide doped with vanadium in the particle size:

[0047] Step 1, select nickel sulfate, manganese sulfate, ammonium metavanadate as raw material, prepare according to nickel, manganese, vanadium molar ratio as 25:75:1;

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

[0049] Step 3, select sodium hydroxide and ammoniacal liquor, be mixed with the ammonia-alkali mixed solution that sodium hydroxide concentration is 10mol / L, ammonia concentration is 1.5mol / L;

[0050] Step 4, dissolving the ammonium metavanadate selected in step 1 into the ammonia-alkali mixed solution prepared in step 3 until the mixed solution is clear without precipitation, and obtaining a vanadium concentration of 0.01mol / L vanadium-containing ammonia-alkali mixed soluti...

Embodiment 2

[0058] The chemical formula is Ni 0.3 mn 0.7 V 0.01 (OH) 2.05 The preparation method of the nickel-manganese composite hydroxide doped with vanadium in the particle size:

[0059] Step 1, select nickel sulfate, manganese sulfate, ammonium metavanadate as raw material, prepare according to nickel, manganese, vanadium molar ratio as 30:70:1;

[0060] Step 2, nickel sulfate, manganese sulfate and pure water selected in step 1 are mixed with a mixed salt solution whose total concentration is 2.0mol / L;

[0061] Step 3, select sodium hydroxide and ammoniacal liquor, be mixed with the ammonia-alkali mixed solution that sodium hydroxide concentration is 10mol / L, ammonia concentration is 1.5mol / L;

[0062] Step 4, dissolving the ammonium metavanadate selected in step 1 into the ammonia-alkali mixed solution prepared in step 3 until the mixed solution is clear without precipitation, and obtaining a vanadium concentration of 0.01mol / L vanadium-containing ammonia-alkali mixed solution...

Embodiment 3

[0070] The chemical formula is Ni 0.2 mn 0.8 V 0.01 (OH) 2.05 The preparation method of the nickel-manganese composite hydroxide doped with vanadium in the particle size:

[0071] Step 1, select nickel sulfate, manganese sulfate, ammonium metavanadate as raw material, prepare according to nickel, manganese, vanadium molar ratio as 20:80:1;

[0072] Step 2, nickel sulfate, manganese sulfate and pure water selected in step 1 are mixed with a mixed salt solution whose total concentration is 2.0mol / L;

[0073] Step 3, select sodium hydroxide and ammoniacal liquor, be mixed with the ammonia-alkali mixed solution that sodium hydroxide concentration is 10mol / L, ammonia concentration is 1.5mol / L;

[0074] Step 4, dissolving the ammonium metavanadate selected in step 1 into the ammonia-alkali mixed solution prepared in step 3 until the mixed solution is clear without precipitation, and obtaining a vanadium concentration of 0.01mol / L vanadium-containing ammonia-alkali mixed solution...

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Abstract

The invention relates to a vanadium-doped nickel-manganese composite hydroxide and a preparation method thereof. The vanadium-doped nickel-manganese composite hydroxide is represented by a general formula Ni < x > Mn < 1-x > Vz (OH) < 2 + a >, wherein x is greater than or equal to 0.1 and less than or equal to 0.9, 0.001 < = z < = 0.01; wherein a is more than or equal to 0.005 and less than or equal to 0.05, the microstructure is determined to be sphere-like by an analytical scanning electron microscope method, the D50 is determined to be 3.0-16.0 mu m by a particle size analysis laser diffraction method, and the specific surface area is determined to be 4.0-13.0 m < 2 > / g by a gas adsorption BET method; the vanadium element is introduced to stabilize the structure of the catalyst; according to the preparation method, atomic-scale mixing of nickel, manganese and vanadium elements is achieved, the obtained vanadium-doped nickel-manganese composite hydroxide has the advantages of being uniform in element distribution, good in sphericity degree and stable in crystal lattice, the problems that in the prior art, vanadium element doping is not uniform, and particles are prone to breakageare solved, and the safety, the cycle performance and the rate performance of the nickel-manganese positive electrode material are further improved.

Description

technical field [0001] The invention belongs to the technical field of lithium-ion battery cathode material precursors, in particular to a nickel-manganese composite hydroxide doped with vanadium and a manufacturing 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. [0003] Due to the lack of cobalt material resources, high price, and non-environmental protection, and the existence of cobalt will also lead to the problem of poor safety of lithium batteries, even the binary and ternary materials developed on the bas...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/485H01M4/505H01M4/525H01M10/0525
CPCH01M4/485H01M4/505H01M4/525H01M10/0525Y02E60/10
Inventor 李军军王孝猛王小敏李航周雨洪祥杜一举王涛周勤俭陈要忠
Owner HUAYOU NEW ENERGY TECH (QUZHOU) CO LTD
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