A kind of positive electrode material of sodium ion battery and its preparation method and sodium ion battery comprising it

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 less preparation process steps, suitable for The effects of large-scale promotion of production and simple operation

Active Publication Date: 2021-06-25
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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  • A kind of positive electrode material of sodium ion battery and its preparation method and sodium ion battery comprising it
  • A kind of positive electrode material of sodium ion battery and its preparation method and sodium ion battery comprising it
  • A kind of positive electrode material of sodium ion battery and its preparation method and sodium ion battery comprising it

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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 sodium ion battery positive material, including:

[0034] (a) The soluble carbonate, manganese salt, and cobalt salt are added to the water to stir, and the resulting precipitate is collected;

[0035] Among them, raw material soluble carbonate includes: at least one of sodium carbonate, or 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] Raw soluble carbonate, soluble manganese salts, and molar ratio of carbonate, manganese ions, and cobalt ions in soluble cobalt salts are: 1: a: b;

[0039] Among them, 0.5 <1 (for example, A can be 0.6, 0.7, 0.8, or 0.9, etc.), and A + b = 1;

[0040] Preferred, raw material soluble carbonate, manganese salt...

Embodiment 1

[0055] The sodium carbonate and manganese sulfate and cobalt sulfate were added in water according to the ratio of molar ratio 1: 0.9: 0.1, and stirred at normal temperature for 6 hours, and the precipitate was collected, dried, pulverized, and then the dried precipitate and NaOH were mixed according to mass ratio 2 : 1 of the proportion of ball milling, then sintered in the air for 500 ° C for 5 hours, sintering 6 hours, i.e., a layer-tunnel structure, a sodium ion battery positive material Na 0.6 Mn 0.8 CO 0.2 O 2 .

[0056] Example 1 Scanning electron microscope detection diagram and transmission electron microscope of a structure sodium-tunneling structure prepared figure 1 with 2 As shown, it is a nano-chip structure. Crystal powder diffraction diagram image 3 As shown, a comparison diffraction standard card tunnel structure manganese oxide (JCPDS No. 27-0750), a layered manganese oxide (JCPDSNO. 27-0752), the synthesized substance is a layered-tunnel symbiosis structure.

Embodiment 2

[0058] The sodium carbonate, manganese chloride and cobalt sulfate were added in water according to the ratio of molar ratio 1: 0.9: 0.1, and stirred at normal temperature for 6 hours, and the precipitate was collected, dried, pulverized, and then the dried precipitate and NaOH were taken according to quality ratio. The proportion of ball mills were uniform, followed by sintering 550 ° C in the air for 5 hours, 900 ° C for 5 hours, i.e., a layer-tunnel structure symbiotic sodium ion battery positive material NA 0.6 Mn 0.8 CO 0.2 O 2 .

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Abstract

The invention provides a positive electrode material of a sodium ion battery, a preparation method thereof and a sodium ion battery containing the same. The chemical composition of sodium ion cathode battery material of the present invention is: Na 0.6 mn 0.8 co 0.2 o 2 ; The positive electrode material of the sodium ion battery has a layered-tunnel composite structure. The positive electrode material of the sodium ion battery of the present invention has a layered and tunnel composite structure, can combine the respective advantages of the layered structure and the tunnel structure, and can solve the problems existing in the existing single layered structure materials in terms of capacity and the like. The preparation process of the positive electrode material of the sodium ion battery of the present invention has few steps, simple operation, and is suitable for large-scale popularization and production.

Description

Technical field [0001] The present invention relates to the field of sodium ion batteries, in particular, to a sodium ion battery positive material and a preparation method thereof and a sodium ion battery comprising therethrough. Background technique [0002] With the increasingness of energy lack and environmental pollution, sustainable new energy development has become the focus of concern and research, and the development of large-scale energy storage technology is increasingly valued. Lithium ion secondary battery has a wide range of promotion and application due to the advantages of high operating voltage, high energy density, long cycle life, and self-discharge rate, and can be seen in various portable equipment and aerospace devices. The figure of a lithium ion battery. [0003] However, due to the lack of lithium resources, and with the promotion of electric vehicles, the prices of lithium compounds continue to rise, the secondary battery of the development of the new io...

Claims

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Application Information

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Patent Type & Authority Patents(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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