Preparation method and application of carbon-nitrogen doped ternary metal oxides

A ternary metal, carbon and nitrogen doping technology, applied in electrical components, battery electrodes, circuits, etc., can solve the problems of large irreversible capacity, large volume change, poor conductivity of ternary metal oxides, etc., and achieve electrochemical stability. and high specific capacity, excellent porous properties, and the effect of increasing active sites for lithium storage

Inactive Publication Date: 2017-09-15
SOUTH CHINA NORMAL UNIVERSITY
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Problems solved by technology

[0003] However, ternary metal oxides also have problems such as poor conductivity, large irreversible capacity, and large volume changes before and after charging and discharging, which restrict their practical application.

Method used

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  • Preparation method and application of carbon-nitrogen doped ternary metal oxides
  • Preparation method and application of carbon-nitrogen doped ternary metal oxides
  • Preparation method and application of carbon-nitrogen doped ternary metal oxides

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preparation example Construction

[0034] The preparation method of the carbon-nitrogen doped ternary metal oxide of the present invention comprises the following steps:

[0035] S1: Synthesis of Zn-IM framework materials in which zinc is coordinated with 2-methylimidazole;

[0036] S2: Weigh the Zn-IM zinc framework material and cobalt nitrate hexahydrate prepared in step S1 and disperse them in a solvent, react under microwave conditions to obtain a coordinated Co-Zn-IM framework material;

[0037] S3: Weigh the coordination Co-Zn-IM framework material prepared in step S2, and sodium dodecylsulfonate, hexadecyltrimethylammonium bromide and copper chloride dihydrate, and disperse them in a solvent, Reaction under microwave conditions to obtain a coordination trimetal hybrid Cu-Co-Zn-IM framework material;

[0038] S4: Calcining the coordinated trimetallic hybrid Cu-Co-Zn-IM framework material prepared in step S3 to obtain a carbon-nitrogen doped ternary metal oxide.

[0039] Specifically, in step S1, weigh 2...

Embodiment 1

[0044] This embodiment describes in detail the preparation method of carbon and nitrogen doped ternary metal oxides.

[0045] A method for doping ternary metal oxides with carbon and nitrogen, comprising the steps of:

[0046] S1: Weigh 40.195mmol of 2-methylimidazole and 4.126mmol of zinc nitrate hexahydrate respectively, add them to the first reaction vessel, and then add 70mL of anhydrous methanol to the first reaction vessel; place the first reaction vessel in a microwave with a power of Under 300W microwave conditions, react at 40-60°C for 3-10min; after the reaction is completed, the first reaction vessel is cooled to room temperature, and the reaction solution is centrifuged in a high-speed centrifuge at a centrifugal speed of 4000r / min for 5min to obtain a white Precipitation; the white precipitate was dried in a vacuum oven at 60° C. for 24 hours to obtain a white powdery solid Zn-IM framework material.

[0047] S2: Take the Zn-IM framework material and 2.062 mmol of...

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Abstract

The invention relates to a preparation method and application of carbon-nitrogen doped ternary metal oxides. The preparation method includes the steps of S1, synthesizing a Zn-IM framework material coordinated by zinc and 2-methylimidazole; S2, weighing the Zn-IM framework material and cobalt nitrate hexahydrate, and dispersing the Zn-IM framework material and the cobalt nitrate hexahydrate into a solvent for microwave reaction to obtain a coordinated Co-Zn-IM framework material; S3, weighing the coordinated Co-Zn-IM framework material, sodium dodecyl sulfate, hexadecyl trimethyl ammonium bromide and copper chloride dihydrate, and dispersing the above materials into a solvent for microwave reaction to obtain a coordinated trimetallic heterozygous Cu-Co-Zn-IM framework material; S4, roasting the coordinated trimetallic heterozygous Cu-Co-Zn-IM framework material prepared in the step S3 so as to obtain the carbon-nitrogen doped ternary metal oxides. The preparation method has the advantages that with the 2-methylimidazole serving as a ligand, highly nitrogen-doped metal oxides can be obtained, and accordingly the prepared carbon-nitrogen doped ternary metal oxides are high in electrochemical stability and specific capacity and can act as an anode material of lithium ion batteries to improve the specific capacity of the lithium ion batteries.

Description

technical field [0001] The invention relates to the application field of negative electrode materials for lithium ion batteries, in particular to a preparation method and application of carbon and nitrogen doped ternary metal oxides. Background technique [0002] Due to the advantages of high energy density, high output voltage, no memory effect and no environmental pollution, lithium-ion batteries have been used more and more. Not only can it be applied to various portable electronic devices, but it also has great application prospects in energy storage devices as power sources for electric vehicles and new energy sources such as solar energy and wind energy. At present, the negative electrode widely used in commercial lithium-ion batteries is mainly graphite-based materials. However, graphite has low theoretical capacity and safety issues, so new negative electrode materials with high theoretical capacity and good safety have received more and more attention. The ternary...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/36H01M4/485H01M4/62
CPCH01M4/364H01M4/485H01M4/625Y02E60/10
Inventor 林晓明牛继亮林佳蔡跃鹏
Owner SOUTH CHINA NORMAL UNIVERSITY
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