Preparation method and application of a self-assembled nanosheet porous structure cobalt tetroxide-zinc oxide composite material

A kind of cobalt tetroxide, nano-sheet technology, applied in nanotechnology, structural parts, nanotechnology and other directions, can solve the problems of specific capacity, cyclability and stability need to be improved, and achieve a favorable volume expansion effect, high specific capacity, convenient The effect of mass production

Active Publication Date: 2019-01-11
SOUTH CHINA NORMAL UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Preliminary research results show that double metal oxide nanocomposites, as anode materials for lithium-ion batteries, can alleviate the volume change effect to a certain extent by taking advantage of different components, but the specific capacity, cycle and stability of the material still need to be improved. improve

Method used

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  • Preparation method and application of a self-assembled nanosheet porous structure cobalt tetroxide-zinc oxide composite material
  • Preparation method and application of a self-assembled nanosheet porous structure cobalt tetroxide-zinc oxide composite material
  • Preparation method and application of a self-assembled nanosheet porous structure cobalt tetroxide-zinc oxide composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] In this example, a self-assembled nanosheet porous structure Co 3 o 4 -The preparation method of ZnO composite material, comprises the following steps:

[0039] S1: Weigh 3mmol of CoCl 2 ·6H 2 O and 3mmol ZnCl 2 Dissolve in a solvent composed of 60mL deionized water and 30mL absolute ethanol, and stir to obtain a uniform mixed salt solution;

[0040] S2: Measure 30 mL of triethanolamine and add it to the mixed salt solution obtained in S1, and continue stirring for 1 hour to make it evenly mixed to obtain a complex solution;

[0041] S3: Pour the complex solution obtained in S2 into a 150mL polytetrafluoroethylene hydrothermal reaction kettle, heat to 180°C and react for 12h to obtain a suspension;

[0042] S4: Filtrate the suspension obtained in S3, collect the precipitate, and perform centrifugation washing with ethanol and deionized water three times each at a speed of 7500r / min, and vacuum dry at 70°C for 12h to obtain a Co-Zn-based precursor thing;

[0043] ...

Embodiment 2

[0046] In this example, a self-assembled nanosheet porous structure Co 3 o 4 -The preparation method of ZnO composite material, comprises the following steps:

[0047] S1: Weigh 3mmol of CoCl 2 ·6H 2 O and 3mmol ZnCl 2 Dissolve in a solvent consisting of 50mL deionized water and 30mL absolute ethanol, and stir to obtain a uniform mixed salt solution;

[0048] S2: Measure 40 mL of triethanolamine and add it to the mixed salt solution obtained in S1, and continue to stir for 1 hour to make it evenly mixed to obtain a complex solution;

[0049] S3: Pour the complex solution obtained in S2 into a 150mL polytetrafluoroethylene hydrothermal reaction kettle, heat to 180°C and react for 12h to obtain a suspension;

[0050] S4: Filtrate the suspension obtained in S3, collect the precipitate, and perform centrifugation washing with ethanol and deionized water three times each at a speed of 7500r / min, and vacuum dry at 70°C for 12h to obtain a Co-Zn-based precursor thing;

[0051]...

Embodiment 3

[0054] In this example, a self-assembled nanosheet porous structure Co 3 o 4 -The preparation method of ZnO composite material, comprises the following steps:

[0055] S1: Weigh 3mmol of CoCl 2 ·6H 2 O and 1 mmol ZnCl 2 Dissolve in a solvent composed of 60mL deionized water and 30mL ethylene glycol, and stir to obtain a uniform mixed salt solution;

[0056] S2: Measure 30 mL of triethanolamine and add it to the mixed salt solution obtained in S1, and continue stirring for 1 hour to make it evenly mixed to obtain a complex solution;

[0057] S3: Pour the complex solution obtained in S2 into a 150mL polytetrafluoroethylene hydrothermal reaction kettle, heat to 160°C and react for 20h to obtain a suspension;

[0058] S4: Filtrate the suspension obtained in S3, collect the precipitate, and perform centrifugation washing with ethanol and deionized water for 5 times each at a speed of 10,000r / min, and freeze-dry at -50°C with a pressure of 1.33Pa and a time of 40h. Obtain Co-Z...

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Abstract

The invention relates to a preparation method and application of a self-assembled nano flaky porous structure tricobalt tetraoxide-zinc oxide composite material. The preparation method of the self-assembled nano flaky porous structure tricobalt tetraoxide-zinc oxide composite material comprises the following steps: mixing low-price and low-toxicity triethanolamine which is taken as a complexing agent with a saline solution containing cobalt ions and zinc ions; carrying out a full reaction in a reaction kettle, and then carrying out centrifugal washing and drying; finally, calcining to obtain the self-assembled nano flaky porous structure tricobalt tetraoxide-zinc oxide composite material. When being used as an anode material for a lithium-ion battery, the self-assembled nano flaky porous structure tricobalt tetraoxide-zinc oxide composite material prepared by the method enables the assembled lithium-ion battery to be high in specific capacity and good in cyclicity and stability, thus having great application potential.

Description

technical field [0001] The invention relates to the research field of negative electrode materials for lithium ion batteries, in particular to a preparation method and application of a self-assembled nanosheet porous structure cobalt tetraoxide-zinc oxide composite material. Background technique [0002] At present, the storage and conversion of energy has become an important issue restricting the sustainable development of the world economy. Due to the advantages of light weight, small size, high power density, no memory effect, green environmental protection and good compatibility, lithium-ion batteries have become a strong candidate for new energy, and are also expected to become solar energy, wind energy, nuclear energy and other new energy sources. A novel electrochemical energy storage power source for energy. Electrode materials are the key to determining the overall performance and cost of lithium-ion batteries. As for anode materials, the current commercial carbon ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/36H01M4/48H01M4/52H01M4/1391H01M4/131H01M10/0525B82Y30/00
CPCB82Y30/00H01M4/131H01M4/1391H01M4/362H01M4/48H01M4/52H01M10/0525Y02E60/10
Inventor 汝强王朕汪贝刘鹏张芃胡社军
Owner SOUTH CHINA NORMAL UNIVERSITY
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