Anode material for lithium ion battery and preparation method thereof

A technology for lithium-ion batteries and cathode materials, applied in battery electrodes, secondary batteries, circuits, etc., can solve the problem of no significant effect on material structure stability, achieve improved reversible specific capacity, simple operation, and improved cycle stability Effect

Inactive Publication Date: 2017-08-04
HUNAN NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the surface coating did not change the structure of the base material and therefore had no significant effect on the structural stability of the material

Method used

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  • Anode material for lithium ion battery and preparation method thereof
  • Anode material for lithium ion battery and preparation method thereof
  • Anode material for lithium ion battery and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Weigh 22.1183g of 0.076mol of cobalt nitrate hexahydrate, 1.5005g of 0.004mol of aluminum nitrate nonahydrate, and 3g of polyacrylamide (PAM), and fully mix the above-mentioned weighed matter with 250mL of deionized water in a 1L beaker at one time. Sonicate until it is completely dissolved, which is solution A; weigh 0.082mol of sodium oxalate 10.988g, 0.001mol of oxalic acid 0.1261g, mix thoroughly with 250mL of deionized water in a 500mL beaker at one time, and ultrasonicate until completely dissolved, which is Solution B; place solution A in an oil bath at 80°C, adjust the speed to 800r / min, add solution B within 10 minutes, and continue stirring at a constant temperature for 2 hours; after the reaction, air cool to room temperature, filter and wash with water for 3 After washing once with alcohol, dry it in a forced air drying oven at 120°C for 4 hours to obtain the oxalate precursor. Weigh 20g of precursor and 4.1251g of lithium carbonate, mix them in a high-speed...

Embodiment 2

[0042] Weigh 22.1183g of 0.076mol of cobalt nitrate hexahydrate, 1.5005g of 0.004mol of aluminum nitrate nonahydrate, and 3g of polyacrylamide (PAM), and fully mix the above-mentioned weighed matter with 250mL of deionized water in a 1L beaker at one time. Sonicate until it is completely dissolved, which is solution A; weigh 0.082mol of sodium oxalate 10.988g, 0.001mol of oxalic acid 0.1261g, mix thoroughly with 250mL of deionized water in a 500mL beaker at one time, and ultrasonicate until completely dissolved, which is Solution B; place solution A in an oil bath at 80°C, adjust the speed to 800r / min, add solution B within 10 minutes, and continue stirring at a constant temperature for 2 hours; after the reaction, air cool to room temperature, filter and wash with water for 3 After washing once with alcohol, dry it in a forced air drying oven at 120°C for 4 hours to obtain the oxalate precursor. Weigh 15g of precursor, 3.0908g of lithium carbonate, 0.0044g of sodium carbonate...

Embodiment 3

[0044] Weigh 22.1183g of 0.076mol of cobalt nitrate hexahydrate, 1.5005g of 0.004mol of aluminum nitrate nonahydrate, and 3g of polyacrylamide (PAM), and fully mix the above-mentioned weighed matter with 250mL of deionized water in a 1L beaker at one time. Sonicate until it is completely dissolved, which is solution A; weigh 0.082mol of sodium oxalate 10.988g, 0.001mol of oxalic acid 0.1261g, mix thoroughly with 250mL of deionized water in a 500mL beaker at one time, and ultrasonicate until completely dissolved, which is Solution B; place solution A in an oil bath at 80°C, adjust the speed to 800r / min, add solution B within 10 minutes, and continue stirring at a constant temperature for 2 hours; after the reaction, air cool to room temperature, filter and wash with water for 3 After washing once with alcohol, dry it in a forced air drying oven at 120°C for 4 hours to obtain the oxalate precursor. Weigh 15g of precursor, 3.087g of lithium carbonate, 0.0088g of sodium carbonate,...

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Abstract

The invention relates to an anode material for a lithium ion battery and a preparation method thereof, and in particular to a preparation method of micro-sodium ion doped high voltage lithium cobalt oxide, and belongs to the field of anode material for the lithium ion battery. The anode material for the lithium ion battery is lithium cobalt oxide doped by more than two metal elements. The chemical general formula of the anode material is Li(1-y)NayCo(1-x)MxO2, wherein y is greater than or equal to 0.0001 but less than or equal to 0.01, x is greater than 0 but less than or equal to 0.5, and M represents one or more of Al, Mg, Zr, Mn, Ni, Ti, Cr, Nb, Y, Cu, Sn, Sc, Ga, In, Ce and La. By doping the metal M, the cyclic stability of the lithium cobalt oxide material is improved; by doping the micro-sodium ions, the specific capacity of the material is improved on the basis of improvement of the cyclic stability of the lithium cobalt oxide material.

Description

technical field [0001] The invention relates to a lithium ion battery positive electrode material and a preparation method thereof, in particular to a preparation method of trace sodium ion doped high-voltage lithium cobaltate, belonging to the field of lithium ion battery positive electrode materials. Background technique [0002] Lithium-ion batteries have the advantages of high energy density, excellent cycle performance, environmental protection and safety, and no memory effect. They are widely used in portable electronic products, electric transportation, national defense aviation, energy storage and other fields. In order to meet the needs of social development, lithium-ion batteries are developing towards high specific energy and high power, which requires high specific capacity of electrode materials and high voltage of positive electrodes. [0003] LiCoO 2 It has good circulation and safety performance, high compaction density (3.7~3.9g / cm 3 ), and the preparation...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/36H01M4/525H01M4/505H01M4/485H01M10/0525
CPCH01M4/362H01M4/485H01M4/505H01M4/525H01M10/0525Y02E60/10
Inventor 杨立山王春辉邵俐周灵胡帅曾喜凤
Owner HUNAN NORMAL UNIVERSITY
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