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Basic nickel sulfate/nickel hydroxide composite precursor and preparation method thereof

A nickel hydroxide and precursor technology, which is applied in the field of basic nickel sulfate/nickel hydroxide composite precursor and its preparation, can solve the problems of not continuing to study the application of basic nickel sulfate, and achieves easy industrial application and simple method. , the effect of uniform gap

Pending Publication Date: 2022-04-26
JINCHI ENERGY MATERIALS CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the patent did not continue to study the application of basic nickel sulfate in positive electrode materials

Method used

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  • Basic nickel sulfate/nickel hydroxide composite precursor and preparation method thereof
  • Basic nickel sulfate/nickel hydroxide composite precursor and preparation method thereof
  • Basic nickel sulfate/nickel hydroxide composite precursor and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] ①Weigh an appropriate amount of nickel sulfate and cobalt sulfate, according to the chemical molecular formula

[0033] 0.006[(Ni 0.995 co 0.005 )(OH) 1.4 (SO 4 ) 0.3 0.29H 2 O] / 0.994[(Ni 0.995 co 0.005 )(OH) 2 ] Prepare a mixed metal salt solution comprising Ni ions and Co ions with a total concentration of 2mol / L, wherein the concentration of Ni ions is 1.99mol / L, and the concentration of Co ions is 0.01mol / L.

[0034] ② Use 3mol / L sodium hydroxide solution as the precipitant solution, and 1mol / L ammonia solution as the complexing agent solution.

[0035] ③Put the mixed metal salt solution, precipitant solution and complexing agent solution into the reactor at the same time, co-currently and continuously to carry out coprecipitation reaction. During the reaction, the temperature is 88°C, the pH value is 10.30, and the stirring speed is 480rpm , the complexing agent concentration in the reaction system is 10% of the total concentration of nickel ions and cobal...

Embodiment 2

[0042] ① Weigh an appropriate amount of nickel sulfate and magnesium sulfate, according to the chemical molecular formula

[0043] 0.008[(Ni 0.995 Mg 0.005 )(OH) 1.4 (SO 4 ) 0.3 0.29H 2 O] / 0.992[(Ni 0.995 Mg 0.005 )(OH) 2 ] Prepare a mixed metal salt solution comprising Ni ions and Mg ions with a total concentration of 2mol / L, wherein the concentration of Ni ions is 1.99mol / L, and the concentration of Mg ions is 0.01mol / L.

[0044] ② Use 3mol / L sodium hydroxide solution as the precipitant solution, and 1mol / L ammonia solution as the complexing agent solution.

[0045] ③Put the mixed metal salt solution, precipitant solution and complexing agent solution into the reactor at the same time, co-currently and continuously to carry out coprecipitation reaction. During the reaction, the temperature is 95°C, the pH value is 10.09, and the stirring speed is 400rpm , the complexing agent concentration in the reaction system is 15% of the total concentration of nickel ions and m...

Embodiment 3

[0051] ① Weigh an appropriate amount of nickel sulfate, cobalt sulfate, magnesium sulfate, according to the chemical molecular formula

[0052] 0.005[(Ni 0.995 co 0.003 Mg 0.002 )(OH) 1.4 (SO 4 ) 0.3 0.29H 2 O] / 0.995[(Ni 0.995 co 0.003 Mg 0.002 )(OH) 2 ] Preparation comprises the mixed metal salt solution that the total concentration of Ni ion, Co ion and Mg ion is 2mol / L, wherein the concentration of Ni ion is 1.99mol / L, and the concentration of Co ion is 0.006mol / L, and the concentration of Mg ion is 0.004mol / L.

[0053] ② Use 3mol / L sodium hydroxide solution as the precipitant solution, and 1mol / L ammonia solution as the complexing agent solution.

[0054] ③Put the mixed metal salt solution, precipitant solution and complexing agent solution into the reactor at the same time, co-currently and continuously to carry out coprecipitation reaction. During the reaction, the temperature is 75°C, the pH value is 10.48, and the stirring speed is 450rpm , the complexing a...

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Abstract

The invention belongs to the technical field of lithium ion battery materials, and discloses a basic nickel sulfate / nickel hydroxide composite precursor and a preparation method thereof. The composite precursor is represented by a general formula m [(Ni1-xMx) (OH) 1.4 (SO4) 0.3. 0.29 H2O] / (1-m) [(Ni1-xMx) (OH) 2], in the process of preparing the composite precursor by a coprecipitation method, the pH value, the temperature and the rotating speed in the reaction process are controlled, and the basic nickel sulfate / nickel hydroxide composite precursor is prepared. The basic nickel sulfate / nickel hydroxide composite precursor provided by the invention is a regular spherical particle, the interior of the particle is radial, gaps are uniform, the strongest characteristic peak near 39 degrees of basic nickel sulfate enhances the intensity of a beta-Ni (OH) 2 (101) peak, and I101 / I001 is greater than 1.

Description

technical field [0001] The invention belongs to the technical field of lithium ion battery materials, and in particular relates to a composite precursor and a preparation method thereof, in particular to a basic nickel sulfate / nickel hydroxide composite precursor and a preparation method thereof. Background technique [0002] With the requirements of electric vehicles on cruising range and cost, high-nickel, low-cobalt or even cobalt-free materials have become the mainstream trend of the lithium battery industry. In layered cathode materials, as the nickel content increases, the dependence of the material properties on the precursor becomes greater, and the crystallization co-precipitation method is the mainstream technology for industrial production of precursors, and it has always been an in-depth exploration and research on this technology. The key technical support for the development of the material industry. In the crystal co-precipitation process, the factors affecti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G53/10C01G53/04H01M4/525H01M10/0525
CPCC01G53/10C01G53/04H01M4/525H01M10/0525C01P2004/80C01P2002/72C01P2004/03
Inventor 孟立君苗小欢张海艳胡志兵侯鑫宇刘宙张娉婷
Owner JINCHI ENERGY MATERIALS CO LTD