Preparation method of sea-urchin-shaped cobalt acid copper nanometer material of nickel foam load

A nanomaterial and nickel foam technology, which is applied in the field of preparation of copper cobaltate nanomaterials, can solve problems such as affecting the contact between ion and electron transport electrolyte and electrodes, achieve good morphology and electrochemical performance, improve electrochemical performance, low cost effect

Inactive Publication Date: 2018-07-31
SOUTH CHINA NORMAL UNIVERSITY
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Problems solved by technology

However, the copper cobaltate material prepared by this method is irregular rod-shaped, which affe

Method used

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  • Preparation method of sea-urchin-shaped cobalt acid copper nanometer material of nickel foam load
  • Preparation method of sea-urchin-shaped cobalt acid copper nanometer material of nickel foam load
  • Preparation method of sea-urchin-shaped cobalt acid copper nanometer material of nickel foam load

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[0044] According to a non-limiting embodiment of the present invention, there is provided a kind of sea urchin-like lithium cobaltate (CuCo 2 o 4 ) A method for preparing a nanomaterial, the method comprising the following steps.

[0045] (1) After the sheet-shaped nickel foam is ultrasonically cleaned, it is placed in a drying oven for drying.

[0046] (2) Disperse cobalt nitrate hexahydrate into the solvent added with urea, and magnetically stir for 0.5 to 1.5 hours after ultrasonic cleaning at room temperature to form a dispersion solution, wherein the solvent is a mixed solution of absolute ethanol and deionized water, without The volume ratio of water ethanol to deionized water is 1:7, and the mass of cobalt nitrate hexahydrate and urea is 26-30:13.

[0047] (3) Add copper acetate monohydrate and ammonium fluoride to the dispersion solution obtained in step (2), and magnetically stir at room temperature for 0.5 to 1.5 hours to form a suspension, wherein the mass ratio o...

Embodiment 1

[0055] Step S1: Cut the nickel foam into a uniform size, the size is 3×4cm 2 , were washed with 3mol / L hydrochloric acid, acetone, absolute ethanol and deionized water successively in an ultrasonic cleaner for 30 minutes, 15 minutes, 10 minutes and 10 minutes, and then dried in a drying oven at 80°C for 12 Hour.

[0056] Step S2: Co(NO 3 ) 2 ·6H 2 O was dispersed into the solvent with urea added, the mass ratio of urea to solvent was 0.13:19, the solvent was mixed with absolute ethanol and deionized water according to the volume ratio of 1:7, ultrasonically cleaned at room temperature and heated at 300RPM The stirring speed was magnetically stirred for 1 h to obtain a dispersed solution.

[0057] Step S3: the Cu(CH 3 COO) 2 ·H 2 O and NH 4 Add F into the dispersion solution, continue magnetic stirring at room temperature at a stirring speed of 300 RPM for 1 h, and prepare a suspension. Among them, Co(NO 3 )2 ·6H 2 The mass ratio of O to urea is 0.29:0.13; Co(NO 3 )...

Embodiment 2

[0062] Except in step S3, Co(NO 3 ) 2 ·6H 2 Except that the mass ratio of O and urea is 0.3:0.13, other steps are with embodiment 1.

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Abstract

The invention discloses the preparation method of the sea-urchin-shaped cobalt acid copper nanometer material of a nickel foam load. In the method, cobalt nitrate hexahydrate, copper acetate monohydrate, ammonium fluoride and urea are used as raw materials, absolute ethyl alcohol and deionized water are used as a solvent, and through hydrothermal growth and a high temperature calcination method, the cobalt acid copper nanometer material possessing a sea urchin structure is prepared. By using the sea-urchin-shaped cobalt acid copper nanometer material of the nickel foam load prepared through using the method of the invention, especially when a calcination temperature is about 550 degree centigrade, the sea urchin shape of the acquired sea-urchin-shaped cobalt acid copper nanometer materialof the nickel foam load is uniform and ordered, and excellent electrochemistry performance and good multiplying power performance are achieved. The preparation technology is simple, the method is energy-saving and environmental-protection, the raw materials are cheap, time consuming is less and the method is easy for batch production. The sea-urchin-shaped cobalt acid copper nanometer material isapplied to a lithium ion battery cathode material and has the excellent electrochemistry performance.

Description

technical field [0001] The invention relates to a negative electrode material of a lithium ion battery, in particular to a preparation method of a copper cobaltate nanometer material. Background technique [0002] At present, the capacity of commercialized graphite materials is only 372mAh / g, which is difficult to meet the needs of the development of the times. Therefore, the development of lithium-ion battery anode materials with high capacity, long life and good stability has become the goal pursued by researchers. Among many anode materials, metal oxides have attracted extensive attention of researchers due to their high theoretical specific capacity and good electronic conductivity. [0003] Transition metal oxide Co 3 o 4 Because of its high theoretical specific capacity (about 890mAh / g), it is regarded as the most promising anode material for the next generation of lithium-ion batteries. However, due to the high cost and high toxicity of cobalt salts, its developmen...

Claims

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Application Information

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IPC IPC(8): H01G11/36H01G11/46H01G11/86
CPCH01G11/36H01G11/46H01G11/86Y02E60/13
Inventor 赵灵智刘妙李友朋
Owner SOUTH CHINA NORMAL UNIVERSITY
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