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A kind of polyimide material and its preparation method and application in alkali metal ion battery

A polyimide, polymerization degree technology, applied in battery electrodes, secondary batteries, circuits, etc., can solve problems such as specific capacity attenuation, and achieve the effects of low cost, easy product purification and wide source of raw materials

Active Publication Date: 2022-03-15
WUHAN INSTITUTE OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The polyimide prepared by polymerizing oxamide and perylenetetracarboxylic dianhydride has a specific capacity of 138.7mAh / g at a current density of 1A / g; and shows good cycle stability, but at 3A / g At a higher current density, the specific capacity rapidly decays to 107.8mAh / g (J.Mater.Chem.A 2020,19283)

Method used

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  • A kind of polyimide material and its preparation method and application in alkali metal ion battery
  • A kind of polyimide material and its preparation method and application in alkali metal ion battery
  • A kind of polyimide material and its preparation method and application in alkali metal ion battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] A kind of polyimide material, its preparation method comprises the steps:

[0032] Add 1,4,5,8-naphthalene tetracarboxylic dianhydride (1.34g, 5mmol), dithiooxamide (600.9mg, 5mmol), zinc acetate (622.1mg, 5mmol) and imidazole ( 12g), stirred and heated to 180°C, kept stirring and reacted for 5h, after the reaction was completed, the system was cooled to room temperature, washed with water, filtered, dried and washed with dimethyl sulfoxide, dried in vacuum, and the final product was 1.44g , yield 82%.

[0033] Product elemental analysis (mass percentage): C60.82% (theoretical value 60.01%); H1.91% (theoretical value 1.26%); O29.37% (theoretical value 29.98%); N8.11% (theoretical value 8.75% ).

Embodiment 2

[0035] A kind of polyimide material, its preparation method comprises the steps:

[0036] Add 1,2,4,6-naphthalene tetracarboxylic dianhydride (1.34g, 5mmol), dithiooxamide (600.9mg, 5mmol), zinc acetate (622.1mg, 5mmol) and imidazole ( 12g), stirred and heated to 180°C, kept stirring and reacted for 5h, after the reaction was completed, the system was cooled to room temperature, washed with water, filtered, dried and washed with dimethyl sulfoxide, dried in vacuum, and the final product was 1.39g , yield 79%.

[0037] Product element analysis (mass percentage): C60.91% (theoretical value 60.01%); H1.57% (theoretical value 1.26%); O29.36% (theoretical value 29.98%); N8.27% (theoretical value 8.75% ).

Embodiment 3

[0039] A kind of polyimide material, its preparation method comprises the steps:

[0040] Add perylenetetracarboxylic dianhydride (1.96g, 5mmol), dithiooxamide (600.9mg, 5mmol) and imidazole (15g) successively into a 100ml single-necked flask, stir and heat up to 150°C, keep stirring for 24h, and mix After the system was cooled to room temperature, it was washed with water, filtered, and the filter cake was dried, washed with dimethyl sulfoxide, and vacuum-dried to obtain 2.10 g of the final product, with a yield of 88.2%.

[0041] Product elemental analysis (mass percentage): C66.70% (theoretical value 65.54%); H2.12% (theoretical value 1.69%); O12.72% (theoretical value 13.43%); N5.64% (theoretical value 5.88% ); S13.92% (theoretical value 13.46%).

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Abstract

The invention provides a polyimide material and a preparation method thereof. The polyimide material is obtained by the polymerization reaction of dithiooxamide and tetraformic acid dianhydride derivatives, and is a sodium-ion battery with great potential. Cathode material. This type of polymer material is difficult to dissolve in most common organic solvents and electrolytes, and the rate performance and cycle stability of the battery are improved. The chemical structural formula of this polyimide material is as follows:

Description

technical field [0001] The invention belongs to the technical field of polymer compounds used in alkali ion batteries, and in particular relates to a polyimide material, a preparation method thereof and an application in alkali metal ion batteries. Background technique [0002] With the intensification of environmental pollution and the pressure of carbon emission indicators, the development and storage of new energy has gradually become the focus of social attention. Currently, lithium-ion batteries are widely used in various small electronic devices and commercialized in electric vehicles. However, the content of lithium in nature is limited. With the increasing demand for lithium-ion batteries, the price of lithium materials is increasing day by day. The sodium and potassium elements in the first main group have far more reserves than lithium in the earth's crust, salt lakes, and seawater. At the same time, they have similar chemical properties to lithium, so sodium-ion ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G73/10H01M4/60H01M10/054
CPCC08G73/1082C08G73/1064C08G73/1039C08G73/1007H01M4/608H01M10/054Y02E60/10
Inventor 高翔刘智豪
Owner WUHAN INSTITUTE OF TECHNOLOGY