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Dumbbell cobalt carbonate material and application thereof

A dumbbell-shaped, cobalt carbonate technology, applied in the direction of active material electrodes, structural parts, electrical components, etc., to achieve the effect of uniform size, good dispersion, simple and easy to control reaction

Inactive Publication Date: 2014-06-25
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In summary, so far there is no report on the dumbbell-shaped cobalt carbonate material with nanorod self-assembled structure and its application in lithium-ion battery anode materials

Method used

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  • Dumbbell cobalt carbonate material and application thereof
  • Dumbbell cobalt carbonate material and application thereof
  • Dumbbell cobalt carbonate material and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] (1) Add cobalt chloride into distilled water in an amount of 0.1g / 40mL, and stir until the solution is clear;

[0030] (2) Add sodium tripolyphosphate in the amount of 0.1g / 40mL to the above solution, and then stir until the solution is clear;

[0031] (3) Add sodium carbonate to the solution described in step (2) with stirring in an amount of 0.2g / 40mL, and then continue to stir for 10min to obtain a cloudy solution;

[0032] (4) Transfer the solution prepared in step (3) to the reactor, seal it, put it in an oven at 100°C, and react for 8 hours;

[0033] (5) After the reaction is over, cool the reactor to room temperature;

[0034] (6) Discard the supernatant in the reaction kettle, rinse the product with water and ethanol for 3±1 times, and then dry it in a 50°C oven for 6 hours, and the obtained powdery product is a dumbbell-shaped cobalt carbonate material;

[0035] The shape of the product is as figure 1 As shown in the SEM photos, the crystallinity is as fig...

Embodiment 2

[0039] (1) Add cobalt nitrate into distilled water in an amount of 2g / 40mL, and stir until the solution is clear;

[0040] (2) Add triethanolamine to the above solution in an amount of 2g / 40mL, and stir until the solution is clear;

[0041] (3) Add potassium bicarbonate to the solution described in step (2) with stirring in an amount of 2g / 40mL, and then continue to stir for 15min to obtain a cloudy solution;

[0042] (4) Transfer the solution prepared in step (3) to the reactor, seal it, put it in an oven at 140°C, and react for 10 hours;

[0043] (5) After the reaction is over, cool the reactor to room temperature;

[0044] (6) Discard the supernatant in the reaction kettle, rinse the product with water and ethanol for 3±1 times, and then dry it in an oven at 70°C for 8 hours. The obtained powdery product is a dumbbell-shaped cobalt carbonate material;

[0045] The shape of the product is as figure 1 As shown in the SEM photos, the crystallinity is as figure 2 Shown in ...

Embodiment 3

[0049] (1) Add cobalt sulfate into distilled water in an amount of 4g / 40mL, and stir until the solution is clear;

[0050] (2) Add triethanolamine to the above solution in an amount of 4g / 40mL, and stir until the solution is clear;

[0051] (3) Add ammonium bicarbonate to the solution described in step (2) with stirring in an amount of 4g / 40mL, and then continue to stir for 20min to obtain a cloudy solution;

[0052] (4) Transfer the solution prepared in step (3) to the reactor, seal it, put it in an oven at 180°C, and react for 16 hours;

[0053] (5) After the reaction is over, cool the reactor to room temperature;

[0054] (6) Discard the supernatant in the reaction kettle, rinse the product with water and ethanol for 3±1 times, and then dry it in an oven at 80°C for 10 hours. The powdery product obtained is a dumbbell-shaped cobalt carbonate material;

[0055] The shape of the product is as figure 1 As shown in the SEM photos, the crystallinity is as figure 2 Shown in ...

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Abstract

The invention discloses a dumbbell cobalt carbonate material which is pure-phase cobalt carbonate formed by a nanorod in a directed self-assembly manner, wherein the shape is a dumbbell shape, the length is 3+ / -0.5 microns, the width of the middle part is 1+ / -0.4 microns, the widths of two ends are 2+ / -0.4 microns, and the formed dumbbell nanorod is 1.5+ / -0.4 microns long and 200+ / -80nm wide. The preparation process comprises the following steps: dissolving a certain amount of cobalt salt into water; adding a certain amount of a metal ion complexing agent and a certain amount of carbonate; reacting for a certain period of time at certain temperature; cleaning and drying to obtain the dumbbell cobalt carbonate material. The production process is simple and convenient to operate, poison is free, and the large-scale production is easy to achieve. The invention also discloses application of the dumbbell cobalt carbonate material in preparation of a lithium ion battery negative electrode material for the first time. Tests show that the capacity of the cobalt carbonate material still can be up to 950mAh / g after circulating 200 times with the current of 200mA / g, and a basis is established for synthesis of a novel nano-material, development of a novel lithium ion battery electrode material with the high performance, and the like.

Description

technical field [0001] The invention relates to a dumbbell-shaped cobalt carbonate material and an application thereof, and belongs to the technical field of nanometer materials and lithium ion battery electrode materials. Background technique [0002] Cobalt carbonate has always been an important industrial salt and has been widely used in many fields. In addition to being commonly used in the production of other cobalt compounds, cobalt carbonate is also used as a coloring agent in the ceramic industry, as a beneficiation agent in the mining industry, as a trace element fertilizer in agriculture, as an analytical reagent in analytical chemistry, in the organic industry Used in the manufacture of catalysts, camouflage coatings, etc. Zeng Huachun’s research group (Chem.Mater.2009, 21, 4984–4992) used organic diethylene glycol as a reaction solvent, cobalt acetate as a raw material, urea as a precipitant, and surfactant polyvinylpyrrolidone as a crystal morphology regulator....

Claims

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Application Information

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IPC IPC(8): H01M4/48H01M4/1391
CPCH01M4/1397H01M4/58H01M10/0525H01M2004/027Y02E60/10
Inventor 沈强赵世强张苗苗于越徐纷纷
Owner SHANDONG UNIV
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