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Ferromanganese binary hydroxide precursor as well as preparation method and application thereof

A hydroxide and precursor technology, applied in iron compounds, chemical instruments and methods, inorganic chemistry, etc., can solve problems such as limited global reserves of cobalt, restrictions on the rapid development of lithium batteries, and radiotoxicity of cobalt, and achieve good sphericity , low cost, environmentally friendly effect

Active Publication Date: 2022-02-08
SVOLT ENERGY TECHNOLOGY CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003]At present, nickel-cobalt-manganese ternary materials are the main products in the cathode material market, but there are still many unsolvable problems, such as the serious mixing of nickel and lithium , which directly leads to a large amount of gas production during charging and discharging, which leads to a series of safety problems. When the nickel content in the ternary material increases, this problem will become more serious; moreover, the current proven global reserves of cobalt limited, resulting in higher prices, and the cobalt element is also radioactive and toxic, which will bring a series of environmental protection problems. The above-mentioned problems will seriously restrict the rapid development of the lithium battery industry. The research and development of materials with other metal element combinations is very important. It is important to solve the above problems

Method used

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  • Ferromanganese binary hydroxide precursor as well as preparation method and application thereof
  • Ferromanganese binary hydroxide precursor as well as preparation method and application thereof
  • Ferromanganese binary hydroxide precursor as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0059] Dissolving manganese sulfate in pure water to obtain a manganese source solution;

[0060] 1. Ferric sulfate is dissolved in water to obtain iron source solution, the concentration of iron element in the iron source solution is 2.5mol / L, and complexing agent sodium citrate is added in the iron source solution, and the addition is 100g / L to obtain Iron source solution after complexation;

[0061] Wherein, the molar ratio of the manganese element in the manganese source solution and the iron element in the iron source solution is 0.5:0.5;

[0062] Prepare 4mol / L sodium hydroxide solution;

[0063] ② Add 4L of aqueous solution to the reactor as the bottom liquid, add 5g of glucose to prevent oxidation of the system, add 30g of sodium citrate as a complexing agent, and then mix the separately prepared manganese source solution and complexed iron source solution with the Sodium hydroxide is added to the bottom solution for reaction. In the reaction system solution, the tot...

Embodiment 2

[0068] ① dissolving manganese sulfate in pure water to obtain a manganese source solution;

[0069] Ferric sulfate is dissolved in pure water to obtain iron source solution, the concentration of the iron element in the iron source is 2mol / L, complexing agent sodium citrate is added to the iron source solution, and the addition is 50g / L to obtain Iron source solution after complexation;

[0070] Wherein, the molar ratio of the manganese element in the manganese source solution and the iron element in the iron source solution is 0.55:0.45;

[0071] Prepare 5mol / L sodium hydroxide solution;

[0072] ②Add 4L of aqueous solution to the reactor as the bottom liquid, add 5g of glucose to prevent oxidation of the system, add 35g of sodium citrate as a complexing agent, and then mix the separately prepared manganese source solution and complexed iron source solution with the Sodium hydroxide is added to the bottom solution for reaction. In the reaction system solution, the total mola...

Embodiment 3

[0076] ① dissolving manganese sulfate in pure water to obtain a manganese source solution;

[0077] Ferric sulfate is dissolved in pure water to obtain iron source solution, the concentration of iron element in the iron source solution is 1.2mol / L, complexing agent sodium citrate is added in the iron source solution, the addition is 20g / L, obtain the complexed iron source solution;

[0078] Wherein, the molar ratio of the manganese element in the manganese source solution and the iron element in the iron source solution is 0.60:0.40;

[0079] Prepare 2mol / L sodium hydroxide solution;

[0080] ② Add 4L of aqueous solution to the reaction kettle as the bottom liquid, add 4g of glucose to prevent oxidation of the system, add 30g of sodium citrate as a complexing agent, and then mix the separately prepared manganese source solution and complexed iron source solution with the Sodium hydroxide was added to the bottom solution for reaction. In the reaction system solution, the tota...

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Abstract

The invention discloses a ferromanganese binary hydroxide precursor as well as a preparation method and application thereof. The method comprises the following steps: 1) respectively preparing a manganese source solution, a complexed iron source solution and a base solution, wherein the base solution comprises a reducing agent, a complexing agent and a solvent; and 2) adding an alkali solution, a manganese source solution and a complexed iron source solution into the base solution to carry out coprecipitation reaction, thereby obtaining the ferromanganese binary hydroxide precursor. According to the method, on the basis of manganese and iron which are low in price and environmentally friendly, uniform coprecipitation of manganese and iron is achieved in a wet method system for the first time, generation of impure phases caused by element segregation is overcome, and atomic-level uniform distribution of the elements is achieved.

Description

technical field [0001] The invention relates to the technical field of new energy, and relates to a ferromanganese binary hydroxide precursor, a preparation method and application thereof. Background technique [0002] With the rapid development of the power battery industry, the research and development of cathode materials has become more and more important. The preparation of cathode materials with excellent performance requires the assistance of precursors with corresponding excellent performance. Therefore, how to prepare suitable precursors has become an urgent problem for the entire industry. The problem. [0003] At present, nickel-cobalt-manganese ternary materials are the main products in the cathode material market, but there are still many unsolvable problems, such as the serious mixing of nickel and lithium, which directly leads to a large amount of gas production during charging and discharging, thus Cause a series of safety problems, when the nickel content i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G49/00H01M4/505H01M4/525H01M10/0525
CPCC01G49/0072H01M4/505H01M4/525H01M10/0525H01M2004/028C01P2002/80C01P2006/40Y02E60/10
Inventor 张宁杨红新李子郯万江涛江卫军张勇杰刘满库刘海松
Owner SVOLT ENERGY TECHNOLOGY CO LTD