Process for producing stephanoporate one-dimensional nano-cobaltic-cobaltous oxide

A technology of tricobalt tetroxide and nanometer, applied in the direction of cobalt oxide/cobalt hydroxide, electrical components, battery electrodes, etc., can solve the problems of difficult to meet the requirements of battery performance improvement, uneven distribution of product particles, high temperature and equipment requirements, etc. Achieve the effects of low cost, high bulk density and short production process

Inactive Publication Date: 2009-08-19
ANHUI NORMAL UNIV
View PDF2 Cites 16 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the particle size distribution of the products prepared by the above several methods is uneven, easy to agglomerate, and the electrochemical performance is poor. After 10 cycles, the specific capacity is from 1000mAh/g to below 100mAh/g. Therefore, its industrialization is difficult.
[0005] 2. Precipitation method: mainly adopt cobalt salt and precipitant (sodium carbonate, ammonium oxalate, etc.) method, which discloses a technical scheme of using cobalt oxalate as the raw material for calcination and decomposing it into tricobalt tetroxi

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Process for producing stephanoporate one-dimensional nano-cobaltic-cobaltous oxide
  • Process for producing stephanoporate one-dimensional nano-cobaltic-cobaltous oxide
  • Process for producing stephanoporate one-dimensional nano-cobaltic-cobaltous oxide

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0026] Example 1:

[0027] Weigh out 1mmol of cobalt chloride (CoC1 2 ), added to 25 mL of distilled water, and continued to add 1 mmol of urea under magnetic stirring to form a mixed solution. Then the mixed solution was heated at 80°C, and the reaction time was controlled for 1 hour. After filtering, washing, and drying in a drying oven at 70°C for 30 minutes. Then calcined at 200° C. for 1 hour, the multifunctional cobalt tetroxide nanowires have a purity of 100%, a particle size of 40 nanometers, and a yield of 87.2% by weight.

Example Embodiment

[0028] Example 2:

[0029] Weigh out 1mmol of cobalt chloride under vigorous stirring, add it to 25mL of distilled water, and continue to add 1mmol of urea under magnetic stirring to form a mixed solution. Then the mixed solution was heated at 100°C, and the reaction time was controlled for 1 hour. After filtering, washing, and drying in a drying oven at 70°C for 5 hours. Then, it is calcined at 300° C. for 1.5 hours to obtain a multifunctional cobalt tetroxide nanorod cluster with a purity of 100%, a particle size of 50 nanometers, and a yield of 87.1% by weight.

Example Embodiment

[0030] Example 3:

[0031] Weigh out 1mmol of cobalt chloride under vigorous stirring, add it to 25mL of distilled water, and continue to add 1mmol of urea under magnetic stirring to form a mixed solution. Then the mixed solution was heated at 120°C, and the reaction time was controlled for 1 hour. After filtering, washing, and drying in a drying oven at 70°C for 12 hours. Then calcined at 400° C. for 2 hours to obtain dispersed multifunctional cobalt tetroxide nanorods with a purity of 100%, a particle size of 50 nanometers, and a yield of 86.9% by weight.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention discloses a method for preparing porous one-dimensional nanometer cobaltosic oxide. The method comprises: a, synthetic step: at the room temperature, bivalent cobalt salt is mixed with a solution of urea, and the obtained mixed solution is heated up to a temperature of between 80 and 120 DEG C for reaction for 0.5 to 12 hours; b, filter-washing step: the synthetic solid product is filtered, washed and dried to obtain the dried cobalt hydroxide with nanometer structure; and c, calcination step: the product obtained by the filter-washing step is heated at a temperature of between 200 and 400 DEG C for 1 to 2 hours, and cooled down to the room temperature. Compared with the prior art, the method has the advantages that: the nanometer powder is uniform in size and good in dispersibility and cleanliness; only the cobalt source is used as a precursor, so that a crystal seed is unnecessarily added; the yield is high, the cost is low, the process flow is short, and the cobaltosic oxide prepared by the method has quite high specific surface area, and when the cobaltosic oxide is applied to the lithium ion battery, the performance of the battery can be greatly improved.

Description

technical field [0001] The invention relates to a preparation method of a nanometer metal oxide, in particular to a preparation method of a porous one-dimensional nanometer cobalt trioxide which can be used as a raw material of lithium cobaltate, a cathode material of a lithium ion battery. Background technique [0002] Lithium-ion batteries have the advantages of high voltage, stable discharge, high-current discharge performance, high specific energy, no pollution, and good cycle performance. In recent years, the lithium-ion battery industry has become increasingly mature, so it is widely used in various products such as mobile phones, computers, and automobiles. With the continuous improvement of the performance of lithium-ion batteries, the research on cathode materials for lithium-ion batteries has also been put forward higher requirements. Cobalt tetroxide is an important raw material for the preparation of lithium cobalt oxide, the positive electrode material of lithiu...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): C01G51/04H01M4/58
CPCY02E60/12Y02E60/10
Inventor 耿保友余楠
Owner ANHUI NORMAL UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap