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Preparation method of nickel manganese oxide

A technology of nickel manganese oxide and titanium hydroxide, applied in nickel compounds, chemical instruments and methods, inorganic chemistry, etc., can solve the problems of difficult to achieve surface coating process, poor doping and fusion effect, affecting doping effect, etc. , to avoid the mixed discharge of nickel and lithium ions, to avoid the mixed discharge of nickel and lithium, and to improve the degree of oxidation.

Inactive Publication Date: 2021-06-08
蒋央芳
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] 1. Since the nickel-manganese precursor has been prepared and has a certain particle size, the metal ions that need to be doped and the nickel-manganese precursor have a solid phase reaction, and the doping and fusion effects between them are poor, so it affects doping effect
[0010] 2. The surface coating process is difficult to achieve, and the coating is achieved by mechanical mixing, and the effect is very poor

Method used

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  • Preparation method of nickel manganese oxide
  • Preparation method of nickel manganese oxide
  • Preparation method of nickel manganese oxide

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preparation example Construction

[0038] The present invention will be described below with reference to the drawings, and the method of preparing a nickel manganese oxide of the present invention is as follows:

[0039] 1) The nickel chloride solution, titanium tetrachloride is added to 8-10 mol / L of ammonia water, and the resulting precipitate obtained after stirring, the chlorinated chloride chloride chloride crystal and titanium oxide mixture;

[0040] 2) Add a mixture of chlorinated chloride chloride chloride and titanium oxide to potassium permanganate, then add pure water, stirred and dissolved, mix well to obtain a slurry, drying drying, to obtain spray drying material;

[0041]3) Put the spray drying material into the high temperature calciner, to obtain a calcined material, a total calcination time of 10-15 h, and the calcination temperature is 700-900 ° C;

[0042] 4) Add the calcination to pure water, and then passed through the ball mill ball milling, the ball milling is 5-8 μm, then discharged, aft...

Embodiment 1

[0054] A method of preparing a nickel manganese oxide, its steps are as follows:

[0055] 1) The nickel chloride solution, titanium tetrachloride is added to 9.5 mol / L of ammonia water, after stirring, the obtained precipitate is filtered after filtration, resulting in a mixture of chloride chloride chloride crystals and titanium oxide. The concentration of the nickel chloride solution is 2 mol / L, titanium tetrachloride is added to the liquid surface before the addition of a layer of protective layer, which is a titanate, and the thickness of the protective layer is 2 cm. .

[0056] When the nickel chloride solution, titanium tetrachloride is added to 9.5 mol / L of ammonia water, and the reaction temperature is 30 ° C, the reaction temperature is 30 ° C, and the reaction temperature is 30 ° C, chlorine in the sealing reaction kettle The molar ratio of nickel chloride and ammonia in the aqueous nickel is 1:30, and the stirring speed is 100R / min, and the addition is 15 min af...

Embodiment 2

[0066] A method of preparing a nickel manganese oxide, its steps are as follows:

[0067] 1) The nickel chloride solution, titanium tetrachloride is added to the ammonia water of 10 mol / L, after stirring, the obtained precipitate was washed after filtration, resulting in a mixture of chloride chloride chloride crystals and titanium oxide;

[0068] 2) Add a mixture of chlorinated chloride chloride chloride and titanium oxide to potassium permanganate, then add pure water, stirred and dissolved, mix well to obtain a slurry, drying drying, to obtain spray drying material;

[0069] 3) Put the spray drying material into the high temperature calciner, to obtain a calcined material, the calcination time is 15 h, the calcination temperature is 900 ° C;

[0070] 4) Add the calcined water to the pure water, and then passed through the ball mill ball mill, the ball milling is 5.6 μm, then discharged, after washing, the potassium ion content in the wash water is less than 100 ppm, then the ...

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Abstract

The invention discloses a preparation method of nickel manganese oxide. The preparation method comprises the following steps: preparing a mixture of nickel hexammine chloride crystals and titanium hydroxide; adding potassium permanganate into the mixture of nickel hexammine chloride crystals and titanium hydroxide, then adding pure water, stirring, dissolving, uniformly mixing to obtain slurry, and carrying out spray drying to obtain a spray-dried material; calcining the spray-dried material in a high-temperature calcining furnace to obtain a calcined material; adding pure water into the calcined material, then performing ball milling through a ball mill, then washing, then adding ammonium meta-vanadate and hot pure water into filter residues, stirring to dissolve ammonium meta-vanadate, then adding paraffin emulsion, performing high-speed dispersion, and then performing spray drying to obtain a second spray-dried material; and calcining the obtained second spray-dried material to obtain the composite nickel manganese oxide. According to the invention, doping and coating of elements are realized, so that the problem of mixed arrangement of nickel ions and lithium ions is effectively avoided, and meanwhile, the cycle life of lithium nickel manganese oxide is prolonged.

Description

Technical field [0001] The present invention relates to a method of preparing a nickel manganese oxide, belonging to the technical field of new energy materials for lithium batteries. Background technique [0002] With the development of new energy vehicles and the development of lithium batteries, most companies in the market have all put them into lithium iron phosphate and three-dimensional lithium batteries, and the positive electrode material is NCM (nickel cobalt manganese) or NCA (nickel-cobalt aluminum) ternary battery. It is indeed significantly to improve the energy density, and it is easily improved. However, some of the hard injuries of the three-dimensional lithium battery are also unable to bypass. [0003] First, the content of cobalt in the crust is low, the abundance is only 0.0025%, and the reserves of global terrestrial cobalt are about 7.1 million tons, and the regional distribution is very concentrated. Congo (gold) is 52% in the global cobalt reserves. The r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G53/00H01M4/505H01M4/525
CPCC01G53/006C01P2004/03C01P2004/30C01P2004/32C01P2004/50C01P2004/61C01P2006/11C01P2006/12C01P2006/80H01M4/505H01M4/525Y02E60/10
Inventor 蒋央芳
Owner 蒋央芳
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