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Silver nanoparticle coated nitrogen doped porous carbon and preparation method thereof

A technology of nitrogen-doped porous carbon and silver nanoparticles, which is applied in nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc., can solve the problems of battery short circuit, battery theoretical capacity and low output power, and achieve The effect of increased volume, simple and efficient synthesis steps, and increased specific surface area

Inactive Publication Date: 2019-06-14
淮安新能源材料技术研究院
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In the application process of lithium-ion batteries, when metallic lithium is used as the negative electrode material, the lithium dendrite ash produced will cause safety problems such as short circuit of the battery; while graphite materials are used as the negative electrode material, the theoretical capacity and output power of the battery are low, which is It is also difficult to overcome, therefore, the research on negative electrode materials that can replace metal lithium and graphite materials has become a challenge

Method used

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  • Silver nanoparticle coated nitrogen doped porous carbon and preparation method thereof
  • Silver nanoparticle coated nitrogen doped porous carbon and preparation method thereof
  • Silver nanoparticle coated nitrogen doped porous carbon and preparation method thereof

Examples

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Embodiment 1

[0025] 1. Synthesis of the precursor ZIF-8: Weigh 0.2 mol of zinc nitrate hexahydrate in a 1000 ml beaker, add 200 ml of anhydrous methanol solution to the beaker, stir at room temperature for 5 min to fully dissolve the zinc nitrate, and prepare Solution A: Weigh 0.8 mol 2-methylimidazole in a 500 ml beaker, add 200 ml of anhydrous methanol solution to the beaker, stir at room temperature for 5 min to fully dissolve 2-methylimidazole; then measure 6.28 ml Pour the 1-methylimidazole solution into the above solution, and stir rapidly to make it fully dispersed in the solution to prepare solution B. Pour solution B into solution A evenly and quickly, stir at room temperature for 5 min to mix the two evenly, seal the mixed solution with plastic wrap, let it stand at room temperature for 12 h, and centrifuge the lower milky liquid for 5 min , and then washed several times with anhydrous methanol, put the product in a ventilated drying oven, and dry at 60 °C for 3 h to obtain ZIF-8...

Embodiment 2

[0030]1. Synthesis of the precursor ZIF-8: Weigh 0.3 mol of zinc nitrate hexahydrate in a 1000 ml beaker, add 300 ml of anhydrous methanol solution to the beaker, stir at room temperature for 8 min to fully dissolve the zinc nitrate, and prepare Solution A: Weigh 1.2 mol 2-methylimidazole in a 500 ml beaker, add 300 ml of anhydrous methanol solution into the beaker, stir at room temperature for 8 min to fully dissolve 2-methylimidazole; then measure 9.42 ml Pour the 1-methylimidazole solution into the above solution, and stir rapidly to make it fully dispersed in the solution to prepare solution B. Pour solution B into solution A evenly and quickly, stir at room temperature for 8 minutes to mix the two evenly, seal the mixed solution with plastic wrap, let it stand at room temperature for 18 hours, and centrifuge the lower milky liquid for 8 minutes , and then washed several times with anhydrous methanol, put the product in a ventilated drying oven, and dry at 70 °C for 4 h to...

Embodiment 3

[0035] 1. Synthesis of the precursor ZIF-8: Weigh 0.4 mol of zinc nitrate hexahydrate in a 1000 ml beaker, add 400 ml of anhydrous methanol solution to the beaker, stir at room temperature for 10 min to fully dissolve the zinc nitrate, and prepare Solution A: Weigh 1.6 mol 2-methylimidazole in a 500 ml beaker, add 400 ml of anhydrous methanol solution to the beaker, stir at room temperature for 10 min to fully dissolve 2-methylimidazole; then measure 12.56 ml Pour the 1-methylimidazole solution into the above solution, and stir rapidly to make it fully dispersed in the solution to prepare solution B. Pour solution B into solution A evenly and quickly, stir at room temperature for 10 min to mix the two evenly, seal the mixed solution with plastic wrap, let it stand at room temperature for 24 h, and centrifuge the lower milky liquid for 10 min , and then washed several times with anhydrous methanol, put the product in a ventilated drying oven, and dry at 80 °C for 5 h to obtain ...

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Abstract

The invention discloses a silver nanoparticle coated nitrogen doped porous carbon and preparation method thereof. The method comprises the steps of: firstly synthesizing a metal organic framework material ZIF-8 precursor with a tetrakaidecahedron morphology; carrying out high-temperature treatment to obtain nitrogen doped porous carbon NPC which keeps the original morphology; and finally coating silver nanoparticles on the nitrogen doped porous carbon NPC so as to finally obtain a silver nanoparticle coated nitrogen doped porous carbon material, wherein the silver nanoparticle coated nitrogendoped porous carbon material has a structure general formula of Ag@NPC. The regular tetrakaidecahedron structure can play a role in stabilizing material structure when being used as a lithium ion battery cathode material; the coating of the silver nanoparticles is beneficial for stabilizing SEI membranes formed in electrochemical test, and promoting the charge transfer process and lithium ion transfer speed, thereby achieving the aim of improving the conductivity and electrochemical performance of the material.

Description

technical field [0001] The invention relates to the technical field of manufacturing negative electrode materials for lithium-ion batteries, in particular to a nitrogen-doped porous carbon wrapped with silver nanoparticles and a preparation method thereof. Background technique [0002] In today's society, the problems of environmental pollution and energy shortage are becoming more and more serious, thus promoting the development of clean energy. Lithium-ion batteries, which have the advantages of high energy density, high voltage and long cycle life, are favored by researchers and are gradually being used in various electronic devices. However, there are still many problems in the application of lithium-ion batteries, so it is imminent to develop new lithium-ion batteries with better performance. Lithium-ion battery anode materials, as one of the core materials of lithium-ion batteries, play a vital role in improving the overall performance of batteries. In the applicatio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/36H01M4/583H01M4/62H01M4/38H01M10/0525B82Y30/00B82Y40/00
CPCY02E60/10
Inventor 封平净刘耀春卢鹏
Owner 淮安新能源材料技术研究院
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