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A kind of preparation method of high specific capacity lithium battery negative electrode material

A negative electrode material, high specific capacity technology, applied in battery electrodes, secondary batteries, circuits, etc., can solve the problems of poor conductivity, large volume change, large irreversible capacity, etc., to achieve the effect of improved stability and simple method

Inactive Publication Date: 2018-01-23
SOUTH CHINA NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Oxide anode materials have the advantages of high theoretical capacity, good cycle performance, and high safety performance. They are ideal materials to replace graphite as the anode of lithium-ion batteries. However, problems such as poor conductivity, large irreversible capacity, and large volume changes before and after charging and discharging restrict their practical application.

Method used

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  • A kind of preparation method of high specific capacity lithium battery negative electrode material
  • A kind of preparation method of high specific capacity lithium battery negative electrode material
  • A kind of preparation method of high specific capacity lithium battery negative electrode material

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specific Embodiment 1

[0036] (1) Organic ligand H 3 Synthesis of BTPCA

[0037] Such as figure 1 Organic ligand H in the present invention 3 The schematic diagram of the synthetic reaction steps of BTPCA is shown, and the specific experimental steps are as follows:

[0038]4-piperidinecarboxylic acid (1 g, 10 mmol) was added into the flask, and then 3 ml of a 2 mol / L sodium hydroxide solution was added to the flask. And sodium bicarbonate (0.92 g, 11 mmol) and 0.6 g of cyanuric chloride were added thereto. The flask was stirred at normal temperature for ten minutes, and 5 ml of 1,4-dioxane was dropped thereinto during stirring. The flask was heated to a temperature ranging from 80-130°C for 12 hours. After the reaction, the flask was cooled to room temperature and diluted to pH=1 with dilute hydrochloric acid. Filtrate at room temperature and wash with water to obtain the ligand.

[0039] (2) Synthesis of metal-organic framework complexes (MOFs)

[0040] Such as figure 2 As shown in the s...

specific Embodiment 2

[0042] (1) Organic ligand H 3 Synthesis of BTPCA

[0043] Such as figure 1 Organic ligand H in the present invention 3 The schematic diagram of the synthetic reaction steps of BTPCA is shown, and the specific experimental steps are as follows:

[0044] 4-piperidinecarboxylic acid (2 g, 15 mmol) was added into the flask, and then 3 ml of a 2 mol / L sodium hydroxide solution was added to the flask. And sodium bicarbonate (0.92 g, 11 mmol) and 0.6 g of cyanuric chloride were added thereto. The flask was stirred at normal temperature for ten minutes, and 5 ml of 1,4-dioxane was dropped thereinto during stirring. The flask was heated to a temperature ranging from 80-130°C for 12 hours. After the reaction, the flask was cooled to room temperature and diluted to pH=1 with dilute hydrochloric acid. Filtrate at room temperature and wash with water to obtain the ligand.

[0045] (2) Synthesis of metal-organic framework complexes (MOFs)

[0046] Such as figure 2 As shown in the ...

specific Embodiment 3

[0048] (1) Organic ligand H 3 Synthesis of BTPCA

[0049] Such as figure 1 Organic ligand H in the present invention 3 The schematic diagram of the synthetic reaction steps of BTPCA is shown, and the specific experimental steps are as follows:

[0050] 4-piperidinecarboxylic acid (1.4 g, 13 mmol) was added into the flask, and then 3 ml of a 2 mol / L sodium hydroxide solution was added to the flask. And sodium bicarbonate (0.92 g, 11 mmol) and 0.6 g of cyanuric chloride were added thereto. The flask was stirred at normal temperature for ten minutes, and 5 ml of 1,4-dioxane was dropped thereinto during stirring. The flask was heated to a temperature ranging from 80-130°C for 12 hours. After the reaction, the flask was cooled to room temperature and diluted to pH=1 with dilute hydrochloric acid. Filtrate at room temperature and wash with water to obtain the ligand.

[0051] (2) Synthesis of metal-organic framework complexes (MOFs)

[0052] Such as figure 2 As shown in th...

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Abstract

The invention discloses a preparation method of a high specific capacity lithium battery negative electrode material, comprising the following steps: (1) synthesis of an organic ligand H3BTPCA; (2) synthesis of metal-organic framework complexes (MOFs). The present invention compares traditional lithium-ion battery anode material (graphite), and the present invention has very big improvement aspect specific capacity, through 100 charge-discharge cycles, specific capacity is improved to 768mAh / g by 372mAh / g. Compared with metal Oxide is used as the negative electrode material of lithium-ion batteries. This invention has greatly improved the stability. After one hundred charge-discharge cycles, its specific capacity drops by about 12%. Compared with the traditional nitrogen-doped method, this The nitrogen method is simpler and more effective. Due to the diversity and designability of organic ligands, we can design organic ligands according to the required elements or element content, so as to obtain different MOF materials, and then obtain different carbon materials.

Description

technical field [0001] The invention belongs to the application field of lithium ion battery negative electrode materials, and in particular relates to a preparation method of high specific capacity lithium battery negative electrode materials. 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. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/583H01M4/62H01M4/60H01M10/0525
CPCH01M4/583H01M4/60H01M4/625H01M10/0525Y02E60/10
Inventor 蔡跃鹏魏雷鸣
Owner SOUTH CHINA NORMAL UNIVERSITY
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