Covalent organic framework/graphene compound organic material, as well as preparation method and application thereof in lithium/sodium ionic battery anode materials

A covalent organic framework, graphene composite technology, applied in battery electrodes, secondary batteries, circuits, etc., can solve problems such as hindering lithium/sodium ion conduction, poor cycle performance, poor rate performance, etc., to achieve large-scale benefits. The effect of industrial production, low solubility, high specific capacity

Active Publication Date: 2019-03-26
SOUTH CHINA NORMAL UNIVERSITY
View PDF7 Cites 16 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the defects of organic materials limit their development: one is the low electrical conductivity, which hinders the conduction of lithium / sodium ions, and has poor rate performance; the other is the high solubility in the electrolyte, which leads to the organic Dissolution of materials during cycling, with poor cycle performance

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Covalent organic framework/graphene compound organic material, as well as preparation method and application thereof in lithium/sodium ionic battery anode materials
  • Covalent organic framework/graphene compound organic material, as well as preparation method and application thereof in lithium/sodium ionic battery anode materials
  • Covalent organic framework/graphene compound organic material, as well as preparation method and application thereof in lithium/sodium ionic battery anode materials

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] (1) The graphene oxide (GO) solution was prepared by the improved Hummers method, and the graphene oxide solution was freeze-dried and calcined at 750°C for 30 minutes under ammonia gas to obtain nitrogen-doped reduced graphene oxide (N-rGO) flakes .

[0047] (2) Add 2 molar parts of 1,3,5-benzenetricarboxylic acid chloride and 3 molar parts of p-phenylenediamine in a molar ratio of 1:1.5 into the ball mill tank, and then add 100 parts by mass of the N- The rGO flakes were ball milled at a high speed for 15 minutes, and then 15 volume parts of 5% NaOH solution was added to continue ball milling for 10 minutes. The obtained product was alternately washed three times with water and ethanol, and finally freeze-dried to obtain the APAS / N-rGO organic composite material.

[0048] (3) APAS / N-rGO, Super P, and PVDF were mixed into a slurry in N-methylpyrrolidone solution at a mass ratio of 7:2:1, coated on a copper foil, and dried in vacuum at 80°C to obtain a negative electro...

Embodiment 2

[0054] (1) The graphene oxide (GO) solution was prepared by the improved Hummers method, and the graphene oxide solution was freeze-dried and then calcined at 700°C for 30 minutes under ammonia gas to obtain nitrogen-doped reduced graphene oxide (N-rGO) flakes .

[0055] (2) Add 2 molar parts of 1,3,5-benzenetricarboxylic acid chloride and 3 molar parts of p-phenylenediamine in a molar ratio of 1:1.5 into the ball mill tank, and then add 100 parts by mass of the N- The rGO flakes were ball milled at a high speed for 15 minutes, and then 15 volume parts of 5% NaOH solution was added to continue ball milling for 10 minutes. The obtained product was alternately washed three times with water and ethanol, and finally freeze-dried to obtain the APAS / N-rGO organic composite material.

[0056] (3) APAS / N-rGO, Super P, and PVDF were mixed into a slurry in N-methylpyrrolidone solution at a mass ratio of 7:2:1, coated on a copper foil, and dried in vacuum at 80°C to obtain a negative el...

Embodiment 3

[0059] (1) The graphene oxide (GO) solution was prepared by the modified Hummers method, and the graphene oxide solution was freeze-dried and then calcined at 800°C for 30 minutes under ammonia gas to obtain nitrogen-doped reduced graphene oxide (N-rGO) flakes .

[0060] (2) Add 2 molar parts of 1,3,5-benzenetricarboxylic acid chloride and 3 molar parts of p-phenylenediamine in a molar ratio of 1:1.5 into the ball mill tank, and then add 100 parts by mass of the N- The rGO flakes were ball milled at a high speed for 15 minutes, and then 15 volume parts of 5% NaOH solution was added to continue ball milling for 10 minutes. The obtained product was alternately washed three times with water and ethanol, and finally freeze-dried to obtain the APAS / N-rGO organic composite material.

[0061] (3) APAS / N-rGO, Super P, and PVDF were mixed into a slurry in N-methylpyrrolidone solution at a mass ratio of 7:2:1, coated on a copper foil, and dried in vacuum at 80°C to obtain a negative el...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention belongs to the technical field of lithium / sodium ionic batteries, and discloses a covalent organic framework / graphene compound organic material, as well as a preparation method and application in lithium / sodium ionic battery anode materials. The preparation method comprises the following steps: calcining graphene oxide at ammonia gas at high temperature to obtain nitrogen-doped reductive graphene oxide sheets; mixing with 1,3,5-benzenetricarbonyl trichloride and p-phenylenediamine, and in-situ synthesizing the covalent organic framework / graphene compound organic material in one step by utilizing a ball mill method. The COF / N-rGO organic compound material prepared by adopting an in-situ one-step ball mill method has relatively low solubility in electrolyte, and favors the structural stability of an anode material. The lithium / sodium ionic battery based on the organic material shows relatively high specific capacity, relatively good rate performance and circulating performance. The method is simple in process, is favorable to large-scale industrial production, and promotes development of lithium ionic battery and sodium ionic battery industrialization.

Description

technical field [0001] The invention belongs to the technical field of lithium / sodium ion batteries, and in particular relates to a covalent organic framework / graphene composite organic material (COF / N-rGO) and its preparation method and application in lithium / sodium ion battery negative electrode materials. Background technique [0002] Lithium ions are widely used in military and civilian fields due to their advantages such as high specific capacity, long cycle life, and no memory effect. Currently, commercial lithium-ion battery anode materials are generally graphite-based materials. However, commercial graphite anodes also have some safety hazards, and the performance of graphite electrodes is easily affected by the preparation process. These factors limit the application and development of lithium-ion batteries. In addition, lithium resources are limited. As the demand for lithium resources increases, the relatively expensive price limits the application of lithium-ion...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): H01M4/36H01M4/587H01M4/62H01M10/0525H01M10/054
CPCH01M4/364H01M4/587H01M4/624H01M4/628H01M10/0525H01M10/054Y02E60/10
Inventor 叶常春钟耀棠李伟善
Owner SOUTH CHINA NORMAL UNIVERSITY
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap