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Zinc aluminate porous carbon-based negative electrode material for lithium ion battery as well as preparation method and application of zinc aluminate porous carbon-based negative electrode material

A technology for lithium ion batteries and negative electrode materials, applied in battery electrodes, secondary batteries, circuits, etc., can solve the problems of low coulombic efficiency, fast capacity decay, and low specific capacity of potassium ion batteries, and achieve high coulombic efficiency and high safety. Sexual, easy to prepare effects

Active Publication Date: 2021-05-04
FUZHOU UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the problems existing in the negative electrode materials of lithium-ion batteries, and solve the common problems of low coulombic efficiency, fast capacity decay, low specific capacity and low safety of potassium-ion batteries.

Method used

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  • Zinc aluminate porous carbon-based negative electrode material for lithium ion battery as well as preparation method and application of zinc aluminate porous carbon-based negative electrode material
  • Zinc aluminate porous carbon-based negative electrode material for lithium ion battery as well as preparation method and application of zinc aluminate porous carbon-based negative electrode material
  • Zinc aluminate porous carbon-based negative electrode material for lithium ion battery as well as preparation method and application of zinc aluminate porous carbon-based negative electrode material

Examples

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Effect test

Embodiment 1

[0033] This example demonstrates a porous structure of ZnAl 2 o 4 / C synthesis method of negative electrode material. ZnAl 2 o 4 The / C negative electrode material is synthesized by preparation and heat treatment at room temperature, including the following steps:

[0034] (1) Pour 2.97 g of zinc nitrate hexahydrate and 2.46 g of 2-methylimidazole into 50 mL of methanol solution, and ultrasonically dissolve them fully. After that, the methanol solution containing 2-methylimidazole was slowly poured into the methanol solution containing zinc nitrate hexahydrate. The resulting mixed solution was stirred at 600 rpm for 24 h at room temperature. Finally, the ZIF-8 white powder was obtained by centrifugation, washed and centrifuged with methanol several times, and dried in an oven at 60 °C.

[0035] (2) Fully dissolve 0.28 g of aluminum trichloride hexahydrate in 20 mL of ultrapure water, then mix with 20 mL of tannic acid solution (10 mg / mL), and stir at room temperature for...

Embodiment 2

[0045] This example demonstrates a porous structure of ZnAl 2 o 4 / C is a lithium-ion battery with a negative electrode.

[0046]The electrode slurry was configured at a ratio of 7:2:1 (sample: conductive carbon black: PVDF (polyvinylidene fluoride)), in which the conductive carbon black was selected as Super P, and the binder was 5% PVDF, that is, 1.0 g of polyvinylidene fluoride The vinyl fluoride powder was fully dissolved in 19.0 g of nitrogen-methylpyrrolidone (NMP) solvent, and then stored in the dark.

[0047] Weigh 70 mg of the sample prepared in Example 1, add about 20 mg of Super P, put it in a mortar, and grind vigorously for 15-20 minutes to make the particle size uniform, mix thoroughly, and then put it in an oven at 60°C to dry ; Then the dried mixed sample is taken out and weighed, according to negative electrode active material: conductive carbon black: binder = 7: 2: 1 ( wt% : wt% : wt% ) mass ratio, drop a certain amount of 5% PVDF, stir in a small we...

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Abstract

The invention discloses a zinc aluminate solid solution porous carbon-based negative electrode material for a lithium ion battery and a preparation method of the negative electrode material. The active substance of the negative electrode material is ZnAl2O4 / C. The problems of low coulombic efficiency, poor cycling stability, low specific capacity, a certain degree of potential safety hazards and the like generally existing in lithium ion batteries are solved. The ZnAl2O4 / C composite material can be directly used as a negative electrode of the lithium ion battery. The lithium ion battery provided by the invention has the advantages of high safety, high coulombic efficiency, good cycling stability, excellent rate capability and the like, so that ZnAl2O4 / C has great potential application value as the negative electrode material of the lithium ion battery.

Description

technical field [0001] The invention belongs to the field of rechargeable battery materials, and in particular relates to a zinc aluminate solid solution porous carbon-based negative electrode material for lithium ion batteries, a preparation method and application thereof. Background technique [0002] Currently, energy shortage and environmental pollution are two major challenges threatening human existence. Fossil fuels have always been the main source of meeting human energy needs, however, due to emissions of nitrous oxide, methane, carbon dioxide and other gases containing volatile organic compounds, these resources are being depleted rapidly, often leading to environmental problems such as Air pollution and global warming. Therefore, renewable and clean energy must be developed to replace fossil fuels, and wind energy, solar energy, and tidal energy are good choices for clean energy. However, they are often limited by natural conditions and intermittent uncertaintie...

Claims

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Application Information

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IPC IPC(8): H01M4/36H01M4/48H01M4/62H01M4/131H01M10/0525
CPCH01M4/362H01M4/483H01M4/62H01M4/625H01M4/628H01M4/131H01M10/0525Y02E60/10
Inventor 肖高李晓慧
Owner FUZHOU UNIVERSITY
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