Sodium ion battery positive electrode material, preparation method thereof and sodium ion battery comprising same

A technology for sodium ion batteries and positive electrode materials, applied in battery electrodes, secondary batteries, chemical instruments and methods, etc., can solve the problems of capacity fading, cycle performance difficult to meet the requirements of practical applications, etc., and achieve simple operation and suitable for large-scale Promote the effect of production and less process steps

Active Publication Date: 2019-04-12
深圳为方能源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, the existing P2-type layered cathode materials are still difficult to meet the requirements of practical applications in terms of cycle performance, and there are obvious defects such as capacity fading during the cycle process.

Method used

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  • Sodium ion battery positive electrode material, preparation method thereof and sodium ion battery comprising same
  • Sodium ion battery positive electrode material, preparation method thereof and sodium ion battery comprising same
  • Sodium ion battery positive electrode material, preparation method thereof and sodium ion battery comprising same

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preparation example Construction

[0033] Further, the present invention also provides the above chemical composition (Na 0.6 mn 0.8 co 0.2 o 2 ) The preparation method of the sodium ion battery cathode material, comprising:

[0034] (a) adding soluble carbonate, manganese salt, and cobalt salt into water to stir the reaction, and collecting the generated precipitate;

[0035] Wherein, the raw material soluble carbonate includes: sodium carbonate, or at least one of potassium carbonate;

[0036] Soluble manganese salts include: at least one of manganese sulfate, manganese nitrate, or manganese chloride;

[0037] The soluble cobalt salt includes: at least one of cobalt sulfate, cobalt chloride, or cobalt nitrate.

[0038] The molar ratio of the raw material soluble carbonate, soluble manganese salt, and soluble cobalt salt to carbonate, manganese ion and cobalt ion is: 1:a:b;

[0039] Wherein, 0.5

[0040] Preferably, the molar ratio of c...

Embodiment 1

[0055] Add sodium carbonate, manganese sulfate and cobalt nitrate into water according to the molar ratio of 1:0.9:0.1, stir at room temperature for 6 hours, filter and collect the precipitate, dry, pulverize, and then dry the precipitate and NaOH according to the mass ratio of 2 :1 ratio ball milled evenly, followed by sintering in the air at 500°C for 5 hours, and at 800°C for 6 hours to obtain the layered-tunnel structure symbiotic sodium ion battery cathode material Na 0.6 mn 0.8 co 0.2 o 2 .

[0056] The scanning electron microscope detection figure and transmission electron microscope of the positive electrode material with layered-tunnel structure symbiosis structure prepared in embodiment 1 are as follows: figure 1 with 2 As shown, it is a nanosheet structure. Its crystal powder diffraction pattern is shown in image 3 As shown, compared with the diffraction standard card tunnel structure manganese oxide (JCPDS NO.27-0750) and the layered structure manganese oxid...

Embodiment 2

[0058] Add sodium carbonate, manganese chloride and cobalt sulfate into water according to the molar ratio of 1:0.9:0.1, stir at room temperature for 6 hours, filter and collect the precipitate, dry, pulverize, and then mix the dried precipitate with NaOH according to the mass ratio The ratio of 2:1 is ball milled evenly, followed by sintering in the air at 550°C for 5 hours, and at 900°C for 5 hours to obtain the layered-tunnel structure symbiotic sodium ion battery cathode material Na 0.6 mn 0.8 co 0.2 o 2 .

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Abstract

The invention provides a sodium ion battery positive electrode material, a preparation method thereof and a sodium ion battery comprising the same. The chemical composition of the sodium ion battery positive electrode material of the present invention is Na0.6Mn0.8Co0.2O2, and the sodium ion battery positive electrode material has a layer-tunnel composite structure. The sodium ion battery positiveelectrode material of the invention has a layer-tunnel composite structure, can combine the advantages of a layered structure and a tunnel structure, and can solve the problems existing in the capacity and other aspects of an existing single layered structural material. The preparation method of the sodium ion battery positive electrode material of the invention has fewer preparation steps and simple operation, and is suitable for large-scale popularization and production.

Description

technical field [0001] The invention relates to the field of sodium ion batteries, in particular to a sodium ion battery cathode material, a preparation method thereof and a sodium ion battery containing the same. Background technique [0002] With the increasingly serious problems of energy shortage and environmental pollution, the development of sustainable new energy has become the focus of current attention and research, and the development of large-scale energy storage technology has also received more and more attention. Due to the advantages of high working voltage, high energy density, long cycle life and low self-discharge rate, lithium-ion secondary batteries have been widely promoted and applied. They can be seen in various portable devices and aerospace devices. The figure of lithium-ion battery. [0003] However, due to the shortage of lithium resources, and with the promotion of electric vehicles, the price of raw material lithium compounds continues to rise, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G51/00H01M4/505H01M4/525H01M10/054
CPCC01G51/006C01P2002/72C01P2004/03H01M4/505H01M4/525H01M10/054Y02E60/10
Inventor 杨应昌沈采云杨斐罗兴怀石维郭雷
Owner 深圳为方能源科技有限公司
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