A kind of preparation method of lithium ion battery negative electrode material based on zif complex

A technology for lithium ion batteries and negative electrode materials, applied in battery electrodes, secondary batteries, circuits, etc., can solve problems such as battery capacity loss, and achieve the effects of improved electrochemical performance, improved specific capacity, and good rate performance.

Inactive Publication Date: 2018-06-15
SOUTH CHINA NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The main reason is that an irreversible reaction occurs inside the battery, resulting in a loss of battery capacity

Method used

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  • A kind of preparation method of lithium ion battery negative electrode material based on zif complex
  • A kind of preparation method of lithium ion battery negative electrode material based on zif complex
  • A kind of preparation method of lithium ion battery negative electrode material based on zif complex

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Experimental program
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Effect test

specific Embodiment 1

[0042] (1) Preparation of negative electrode material (nitrogen-doped carbon material)

[0043] Step 1: Take 0.1mmol ZnNO 3 ·6H 2 O, 0.1mmol 2-methylimidazole, 0.1mmol 2,3-pyridinedicarboxylic acid, 5ml water in a 15ml reactor lined with polytetrafluoroethylene, reacted at a temperature range of 100-160°C for 2 days Decrease to room temperature at a rate of 1°C / 10min.

[0044] Step 2: Take the crystal in the reaction kettle in step 1 on a glass slide, select a suitable crystal under a microscope, measure it on a "Bruker APEX-II CCD" single crystal instrument, obtain crystal data, and use APEXII software for data analysis , the crystal structure is solved, and the chemical formula of the crystal is [Zn 6 (2-MIm) 10 2H 2 O], use Diamond software to draw the structure diagram. figure 1 : It is a three-dimensional structure diagram drawn by Diamond software after the crystal structure is solved by APEXII software. figure 2 : It is a three-dimensional topological map drawn ...

specific Embodiment 2

[0052] A kind of preparation method of the negative electrode material of lithium ion battery based on ZIF complex, comprises the steps:

[0053] Step 1: Take ZnNO 3 ·6H 2 O,2-methylimidazole, 2,3-pyridinedicarboxylic acid three kinds of reactant, add water in the reactor that liner is the polytetrafluoroethylene material, described three kinds of reactant ZnNO 3 ·6H 2 The ratio of O, 2-MIm, and 2,3-pyridinedicarboxylic acid is 1:1:1, and the added water is 1 / 4 of the liner capacity. At a temperature of 100°C, react for two days, and then use The temperature was lowered to room temperature at a rate of 1 °C / 10 min.

[0054]Step 2: Take the crystal in the reaction kettle in step 1 on a glass slide, select a suitable crystal under a microscope, measure it on a "Bruker APEX-II CCD" single crystal instrument, obtain crystal data, and use software APEXII for data analysis , analyze the crystal structure, the chemical formula is [Zn 6 (2-MIm) 10 2H 2 O], use Diamond software ...

specific Embodiment 3

[0061] A kind of preparation method of the negative electrode material of lithium ion battery based on ZIF complex, comprises the steps:

[0062] Step 1: Take ZnNO 3 ·6H 2 O,2-methylimidazole, 2,3-pyridinedicarboxylic acid three kinds of reactant, add water in the reaction kettle that lining is made of polytetrafluoroethylene material, described three kinds of reactant ZnNO 3 ·6H 2 The ratio of O, 2-MIm, and 2,3-pyridinedicarboxylic acid is 1:1:1, and the added water is 3 / 4 of the lining capacity. At a temperature of 160°C, react for two days, and then use The temperature was lowered to room temperature at a rate of 1 °C / 10 min.

[0063] Step 2: Take the crystal in the reaction kettle in step 1 on a glass slide, select a suitable crystal under a microscope, measure it on a "Bruker APEX-II CCD" single crystal instrument, obtain crystal data, and use software APEXII for data analysis , analyze the crystal structure, the chemical formula is [Zn 6 (2-MIm) 10 2H 2 O], use Di...

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Abstract

The invention discloses a preparation method of a novel lithium ion battery negative electrode material based on a ZIF complex. The present invention synthesizes a novel imidazole zeolite organic framework compound, utilizes it to prepare a nitrogen-doped porous carbon material, and applies it to the negative electrode material of a lithium-ion battery, which can achieve a specific discharge capacity of 1211mAh / g for the first time. When the charge and discharge current density is 100mA / g, the specific capacity is almost 620mAh / g (the theoretical value of the specific capacity of the commercialized graphite negative electrode is 372mAh / g), even after 100 cycles, it reflects its good cycle performance, and when the current density is 1000mA / g, the specific capacity can reach 410mAh / g, reflecting its good rate performance.

Description

technical field [0001] The invention belongs to the application field of negative electrode materials of lithium ion batteries, and belongs to energy storage functional materials, in particular to a preparation method of negative electrode materials of lithium ion batteries based on ZIF complexes. Background technique [0002] Since the 21st century, with the depletion of non-renewable fossil fuels such as coal, oil, and natural gas, and the environmental pollution caused by their combustion, energy and environmental issues have become a major bottleneck affecting the sustainable development of the world today. In order to solve this world problem, it is particularly urgent to seek renewable green energy to replace traditional fossil fuels. In 1990, Japan's Sony and Moli companies took the lead in commercializing lithium-ion batteries with carbon as the negative electrode. Compared with secondary batteries such as traditional lead-acid batteries, nickel-cadmium batteries an...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/60H01M4/139H01M10/0525
CPCH01M4/139H01M4/60H01M10/0525Y02E60/10
Inventor 蔡跃鹏林强
Owner SOUTH CHINA NORMAL UNIVERSITY
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