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A kind of preparation method of sodium ion transition metal oxide cathode material

A transition metal and cathode material technology, which is applied in the field of preparation of sodium ion transition metal oxide cathode materials, can solve the problems of impairing battery cycle life and rate performance, lacking cycle performance and rate performance, and hindering the practical application of sodium ion batteries. , to achieve the effect of improving cycle stability, promoting practical application, excellent cycle performance and rate performance

Active Publication Date: 2022-05-27
徐州浩华能源科技有限公司
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Problems solved by technology

[0003] The performance of the cathode materials currently on the market is affected by many factors when they are used, which seriously hinders the practical application of sodium-ion batteries. The sodium ions with larger radius will cause the structure of the main material to collapse during the repeated intercalation / extraction process, seriously It damages the cycle life and rate performance of the battery, and does not have certain limitations in use due to the excellent cycle performance and rate performance

Method used

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  • A kind of preparation method of sodium ion transition metal oxide cathode material
  • A kind of preparation method of sodium ion transition metal oxide cathode material
  • A kind of preparation method of sodium ion transition metal oxide cathode material

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preparation example Construction

[0024] The present invention provides a technical solution: a preparation method of a sodium ion transition metal oxide positive electrode material, the preparation method comprising the following steps:

[0025] S1, mixing: first take out the stoichiometric amounts of sodium acetate trihydrate, manganese acetate tetrahydrate, nickel acetate tetrahydrate, cobalt acetate tetrahydrate, magnesium acetate, zinc acetate dihydrate and citric acid, and dissolve them in quantitative water uniformly, then After fully stirring and dissolving, transfer to a water bath and continue to stir until gelatinous;

[0026] S2, grinding and firing: take out the gelatinous material and put it in an oven for drying, then put it into an agate mortar and grind it fully, and then put it in a muffle furnace for firing to remove the residual organic matter inside, and wait for After cooling, grind again, and finally continue to burn in muffle furnace for 10 hours;

[0027] S3, molding: After the materi...

example 1

[0036] The present invention provides a technical solution: a chemical fiber composite material and a preparation method thereof. The preparation method includes the following steps:

[0037] S1, mixing: first take out the stoichiometric amounts of sodium acetate trihydrate, manganese acetate tetrahydrate, nickel acetate tetrahydrate, cobalt acetate tetrahydrate, magnesium acetate, zinc acetate dihydrate and citric acid, and dissolve them in quantitative water uniformly, then After fully stirring and dissolving, transfer to a water bath and continue to stir until gelatinous;

[0038] S2, grinding and firing: take out the gelatinous material and put it in an oven for drying, then put it into an agate mortar and grind it fully, and then put it in a muffle furnace for firing to remove the residual organic matter inside, and wait for After cooling, grind again, and finally continue to burn in muffle furnace for 10 hours;

[0039] S3, molding: After the material is cooled to room ...

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Abstract

The invention discloses a method for preparing a sodium ion transition metal oxide positive electrode material. The preparation steps include the following steps: S1, mixing: first, stoichiometrically mix sodium acetate trihydrate, manganese acetate tetrahydrate, nickel acetate tetrahydrate, and acetic acid tetrahydrate Cobalt, magnesium acetate, zinc acetate dihydrate and citric acid were taken out and uniformly dissolved in a certain amount of water, then fully stirred and dissolved, then transferred to a water bath and continued to stir until gelatinous. The sodium ion positive plate prepared by the present invention can effectively weaken the Jahn-Teller effect of Mn3+ ions by doping Zn element inside it, and better improve the structural stability of the positive electrode material in the cycle process, thereby The cycle life and rate performance of the prepared material are effectively improved, and the amount of Zn doping can be further increased to continue to improve the cycle stability of the material. When used, it has excellent cycle performance and rate performance. This kind of positive electrode material can effectively promote sodium ion The practical application of the battery has strong practicability.

Description

technical field [0001] The invention relates to the technical field of battery positive electrode materials, in particular to a preparation method of a sodium ion transition metal oxide positive electrode material. Background technique [0002] Excessive use of fossil fuels has not only caused serious environmental problems, but also brought about an energy crisis. Lithium-ion batteries have been widely used due to their advantages of high voltage, large specific energy, and good safety performance, but the lack of lithium resources makes it difficult to meet the requirements of large-scale energy storage. Na-ion batteries have attracted much attention due to their similar electrochemical performance to Li-ion batteries, low cost, and abundant reserves. [0003] The performance of the current cathode materials on the market is affected by many factors, which seriously hinders the practical application of sodium-ion batteries. The large-radius sodium ions will cause the stru...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/485H01M4/505H01M4/525H01M10/054
CPCH01M4/485H01M4/505H01M4/525H01M10/054Y02E60/10
Inventor 刘浩沈少华霍娟娟高虹乔芸聂新明
Owner 徐州浩华能源科技有限公司
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