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Preparation method of ZIF complex based novel lithium ion battery cathode materials

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: 2016-07-13
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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  • Preparation method of ZIF complex based novel lithium ion battery cathode materials
  • Preparation method of ZIF complex based novel lithium ion battery cathode materials
  • Preparation method of ZIF complex based novel lithium ion battery cathode materials

Examples

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-MIm (2-methylimidazole), 0.1mmol 2,3-pyridinedicarboxylic acid, 5ml water in a 15ml Teflon-lined reactor, at a temperature range of 100-160°C After 2 days of reaction, the temperature was lowered 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, and measure it on a "Bruker APEX-IICCD" single crystal instrument to obtain crystal data. Use the software APEXII to analyze the data and solve the problem. The crystal structure is obtained, 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 ...

specific Embodiment 2

[0052] A preparation method of a novel lithium-ion battery negative electrode material based on a ZIF complex, comprising the steps of:

[0053] Step 1: Take ZnNO 3 ·6H 2 O,2-MIm (2-methylimidazole), 2,3-pyridinedicarboxylic acid three kinds of reactants, add water in the reactor that lining is the polytetrafluoroethylene material, described three kinds of reactants 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 the microscope, measure it on the "Bruker APEX-IICCD" single crystal instrument, and obtain the crystal data, and use the software APEXII to analyze the data. Crystal structure, chemical formula is [Zn 6 (2-MIm) 10 2H 2 O], use Diamond...

specific Embodiment 3

[0061] A preparation method of a novel lithium-ion battery negative electrode material based on a ZIF complex, comprising the steps of:

[0062] Step 1: Take ZnNO 3 ·6H 2 O,2-MIm (2-methylimidazole), 2,3-pyridinedicarboxylic acid three kinds of reactants, add water in the reactor that lining is the polytetrafluoroethylene material, described three kinds of reactants 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 the microscope, measure it on the "Bruker APEX-IICCD" single crystal instrument, and obtain the crystal data, and use the software APEXII to analyze the data. Crystal structure, chemical formula is [Zn 6 (2-MIm) 10 2H 2 O], use Diamo...

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Abstract

The invention discloses a preparation method of ZIF complex based novel lithium ion battery cathode materials.The preparation method has the advantages that a novel zeolitic imidazole organic framework compound is synthesized to prepare nitrogen-doped porous carbon materials which are applied to the lithium ion battery cathode materials, so that first specific discharge capacity reaches 1211 mAh / g, charge-discharge current density reaches 100 mA / g, and specific capacity is almost about 620 mAh / g (a theoretical value of commercial graphite cathode specific capacity reaching 372 mAh / g); even if the lithium ion battery cathode materials cycle for 100 times, good cycle performance can be demonstrated, and when current density reaches 1000 mAh / g, specific capacity can also reach 410 mAh / g, so that excellent rate performance can be demonstrated.

Description

technical field [0001] The invention belongs to the application field of lithium-ion battery negative electrode materials, and belongs to energy storage functional materials, in particular to a preparation method of a novel lithium-ion battery negative electrode material based on a ZIF complex. 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 and n...

Claims

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Application Information

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Patent Type & Authority Applications(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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