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Carbonate precursor and preparation method thereof

A carbonate and precursor technology, applied in the field of carbonate precursor and its preparation, can solve the problems of high production cost, high impurity content, and low density, and achieve low cost, low impurity content, and simple process Effect

Active Publication Date: 2021-08-13
JINCHI ENERGY MATERIALS CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] Aiming at the problems of low density, high impurity content and high production cost of the carbonate precursor prepared in the prior art, the present invention provides a carbonate precursor and its preparation method

Method used

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  • Carbonate precursor and preparation method thereof
  • Carbonate precursor and preparation method thereof

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Effect test

Embodiment 1

[0040] ① Preparation of feed solution: Dissolve manganese sulfate, cobalt sulfate, nickel sulfate, and magnesium sulfate in deionized water according to the stoichiometric molar ratio Mn:Co:Ni:A=0.70:0.15:0.15:0.01 to prepare the total metal ion concentration It is a 2mol / L mixed metal ion solution. Sodium carbonate was dissolved in deionized water to prepare a 2mol / L precipitant solution. Sodium fluoride was dissolved in deionized water to prepare a 0.2mol / L complexing agent solution.

[0041] ② Co-precipitation reaction: In the nucleation reaction stage, the sodium carbonate solution and the mixed metal ion solution are adjusted according to the molar ratio of the carbonate ion to the total metal ion = 3:1 to adjust the flow rate of the pumped sodium carbonate solution and the mixed metal ion solution, and complex The concentration of the agent in the total feed solution is controlled at 0.01mol / L, and pumped into a 100L continuous stirring reactor at the same time, which c...

Embodiment 2

[0052] ① Preparation of feed solution: Manganese sulfate, cobalt sulfate, nickel sulfate, and aluminum sulfate are dissolved in deionized water according to the stoichiometric ratio of Mn: Co: Ni: A=0.60:0.20:0.20:0.01 to prepare a total metal ion concentration of 2mol / L mixed metal ion solution. Sodium carbonate was dissolved in deionized water to prepare a 2mol / L precipitant solution. Sodium fluoride was dissolved in deionized water to prepare a 0.2mol / L complexing agent solution.

[0053] ② Co-precipitation reaction: In the nucleation reaction stage, the sodium carbonate solution and the mixed metal ion solution are adjusted according to the molar ratio of carbonate ions and total metal ions to 5:1, and the pumping flow rate of the materials is adjusted. The complexing agent is in the total feed solution The concentration is controlled at 0.012mol / L, and pumped into a 100L continuous stirring reactor at the same time, which contains 50L sodium carbonate solution as the bot...

Embodiment 3

[0066] ① Preparation of feed solution: Manganese sulfate, cobalt sulfate, nickel sulfate, magnesium sulfate are dissolved in deionized water according to the stoichiometric ratio Mn: Co: Ni: A=0.50:0.20:0.30:0.01 to prepare a total metal ion concentration of 2mol / L mixed metal ion solution. Sodium carbonate was dissolved in deionized water to prepare a 2mol / L precipitant solution. Sodium fluoride was dissolved in deionized water to prepare a 0.2mol / L complexing agent solution.

[0067] ② Co-precipitation reaction: In the nucleation reaction stage, the sodium carbonate solution and the mixed metal ion solution are adjusted according to the molar ratio of carbonate ions and total metal ions to 3:1, and the pumping flow rate of the materials is adjusted. The complexing agent is in the total feed solution The concentration of the solution is controlled at 0.01mol / L, and it is pumped into a 100L continuous stirring reactor, which contains 50L sodium carbonate solution as the botto...

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Abstract

The invention belongs to the technical field of lithium ion battery materials, and particularly discloses a carbonate precursor and a preparation method thereof. The carbonate precursor disclosed by the invention is a spindle coralline secondary spherical particle formed by stacking fibrous primary particles, and is represented by a general formula Mn1-x-yCoxNiyAtCO3. According to the method, carbonate is adopted for co-precipitation crystallization, soluble carbonate is taken as a precipitator in the co-precipitation reaction, the growth of particles is prolonged through low-temperature nucleation and high-temperature growth and by using concentration equipment, an intermediate with high compactness and large tap density is generated, and the intermediate is subjected to hydrothermal reaction to obtain a spherical carbonate precursor material with low impurity content. Compared with the prior art, the preparation method disclosed by the invention is simple in process and low in cost, and the prepared lithium-rich manganese-based carbonate precursor is low in impurity content.

Description

technical field [0001] The invention belongs to the technical field of lithium ion battery materials, and in particular relates to a carbonate precursor and a preparation method thereof. Background technique [0002] The development of new energy vehicles is the only way for our country to move from a large automobile country to a powerful automobile country. However, the short mileage and high cost restrict the rapid development of new energy vehicles. With the requirement of the national subsidy policy on the mileage of new energy vehicles, the reshuffle of the industry has intensified, and the development of high-performance power batteries has become the only way for enterprises to survive in the fierce competition. At present, the positive electrode materials of power batteries commonly used in the world have gradually transitioned from the initial lithium manganate and lithium iron phosphate to ternary materials such as nickel-cobalt lithium manganese oxide and nickel...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G53/00H01M4/505H01M10/0525
CPCC01G53/006C01P2002/72C01P2004/03C01P2004/32C01P2004/50C01P2006/11C01P2006/12C01P2006/80H01M4/505H01M10/0525H01M2004/028H01M2220/10H01M2220/20H01M2220/30Y02E60/10
Inventor 孟立君张海艳胡志兵吴泽盈胡海诗刘庭杰周春仙刘玮乔凡苏帅侯鑫宇曾永详黎力张娉婷朱璟何绪锋
Owner JINCHI ENERGY MATERIALS CO LTD
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