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Synthesis method of nanowire-type cobalt carbonate negative electrode material

A technology of negative electrode material and synthesis method, which is applied in the direction of battery electrodes, structural parts, electrical components, etc., can solve the problems that it is difficult to meet the higher requirements of power battery energy density, and achieve the effect of improving performance

Active Publication Date: 2019-12-31
SUZHOU YOULION BATTERY INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The theoretical capacity of graphite, a commercial anode material, is only 372mAh / g, which is difficult to meet the higher requirements of the market for the energy density of power batteries

Method used

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  • Synthesis method of nanowire-type cobalt carbonate negative electrode material
  • Synthesis method of nanowire-type cobalt carbonate negative electrode material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] This example shows a method for synthesizing a nanowire-type cobalt carbonate negative electrode material, comprising the following steps

[0027] 1) Weigh 3.1125g of cobalt acetate tetrahydrate and 3.75g of urea, add them into 125ml of deionized water, stir and dissolve completely, transfer to the reaction kettle for sealing and then rotate, the rotation speed is 300rpm, the temperature is 160°C, and react for 12h to prepare the reaction product;

[0028] 2) After the reaction kettle was cooled to room temperature, the reaction product was taken out, the upper clear layer was removed, rinsed with deionized water and absolute ethanol for 3+1 times, and then dried in a 60°C oven to prepare a dried product;

[0029] 3) The dried product is placed in a N2 atmosphere at 200° C. for heat treatment to remove crystal water, and the nanowire-type cobalt carbonate negative electrode material is finally obtained.

[0030] see figure 1 , which shows the scanning electron microgr...

Embodiment 2

[0032] This example shows a method for synthesizing a nanowire-type cobalt carbonate negative electrode material, comprising the following steps

[0033] 1) Weigh 3.1125g of cobalt acetate tetrahydrate and 0.75g of urea, add them into 125ml of deionized water, stir and dissolve completely, transfer to the reaction kettle for sealing and then rotate at 100rpm, temperature 80°C, react for 2h, and prepare the reaction product;

[0034] 2) After the reaction kettle was cooled to room temperature, the reaction product was taken out, the upper clear layer was removed, rinsed with deionized water and absolute ethanol for 3+1 times, and then dried in an oven at 50°C to prepare a dried product;

[0035] 3) The dried product is placed in a N2 atmosphere at 100° C. for heat treatment to remove crystal water, and the nanowire-type cobalt carbonate negative electrode material is finally obtained.

[0036] see figure 2 , which shows the cycle diagram and charge-discharge curve of the nan...

Embodiment 3

[0038] 1) Weigh 3.1125g of cobalt acetate tetrahydrate and 1.5g of urea, add them into 125ml of deionized water, stir and dissolve completely, transfer to the reaction kettle to seal and then rotate, the speed is 600rpm, the temperature is 100°C, and react for 24h to prepare the reaction product;

[0039] 2) After the reaction kettle was cooled to room temperature, the reaction product was taken out, the upper clear layer was removed, rinsed with deionized water and absolute ethanol for 3+1 times, and then dried in an oven at 100°C to prepare a dried product;

[0040] 3) The dried product is placed in a N2 atmosphere at 400° C. for heat treatment to remove crystal water, and the nanowire-type cobalt carbonate negative electrode material is finally obtained.

[0041] The performance differences between the nanowire-type cobalt carbonate negative electrode materials prepared in Example 3 and Example 2 and Example 1 are small, and the purpose is to show the nanowire-type cobalt c...

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Abstract

The invention relates to a synthetic method of a nanowire cobalt carbonate negative electrode material. The method comprises the following steps: preparing a mixture according to a molar ratio of a cobalt salt to urea of 1:5 to 1:1; adding deionized water to the mixture, and stirring the deionized water and the mixture to fully and completely dissolve the mixture in order to obtain a mixture solution; placing the mixture solution in a reaction kettle, sealing the reaction kettle, rotating the sealed reaction kettle to prepare a reaction product; cooling the reaction kettle, removing the obtained supernatant, washing the reaction product, placing the reaction product in an oven, and drying the reaction product to prepare a dried product; and carrying out heat treatment on the dried product in N2 atmosphere to remove crystal water in order to finally obtain the nanowire cobalt carbonate negative electrode material. The reversible capacity of the nanowire cobalt carbonate negative electrode material prepared through the synthetic method of the nanowire cobalt carbonate negative electrode material reaches 1200 mAh / g, and is 3 times higher than that of commercial graphite negative electrodes, and the performances of a lithium ion battery are greatly improved.

Description

technical field [0001] The invention relates to lithium ion electron preparation technology, specifically, it shows a synthesis method of nanowire-type cobalt carbonate negative electrode material. Background technique [0002] Since the 20th century, with the continuous development of human society, the demand for energy has been increasing day by day, and the shortage or even exhaustion of energy has become the bottleneck for the continued development of human beings. , Environmentally friendly battery materials. Since the energy crisis in the 1970s, new batteries using lithium and transition metal compounds as energy storage materials have entered the stage of history. Compared with the previous secondary batteries, lithium-ion secondary batteries have high voltage, high capacity density, and good cycle performance. and other outstanding advantages. [0003] The performance of lithium-ion batteries depends largely on the negative electrode material. The theoretical cap...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/58H01M10/0525
CPCH01M4/5825H01M10/0525Y02E60/10
Inventor 王佳伟刘贯东傅裕
Owner SUZHOU YOULION BATTERY INC
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