Cellulose-based carbon fibers, preparation method thereof and method for preparing electrode material

A technology for preparing electrodes and fiber electrodes, which is applied in battery electrodes, fiber chemical characteristics, circuits, etc., can solve the problems of restricting large-scale industrial application, high requirements for instruments and equipment, and increasing production costs, achieving abundant reserves, low prices, low cost effect

Active Publication Date: 2017-07-14
CENT SOUTH UNIV
View PDF3 Cites 15 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

To make its electronic conductivity high, carbon fiber needs to be graphitized to increase its degree of graphitization. Now the main treatment method to increase the degree of graphitization of carbon fiber is high-temperature graphitization at a temperature greater than 1800 ° C, and high-temperature graphitization What it brings is high energy consumption and high requirements for instruments and equipment, which increases production costs and limits the conditions for its large-scale industrial application

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
  • Cellulose-based carbon fibers, preparation method thereof and method for preparing electrode material
  • Cellulose-based carbon fibers, preparation method thereof and method for preparing electrode material
  • Cellulose-based carbon fibers, preparation method thereof and method for preparing electrode material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Embodiments of the present invention provide a method for preparing cellulose-based carbon fibers on the one hand, comprising the following steps:

[0037] S100. Preparation of cellulose raw materials: directly take cellulose-rich materials from plants as raw materials, wash the raw materials, boil them with alkali, beat them into fibers, wash them until they are neutral, and dry them to obtain cellulose raw materials;

[0038]In this step, before carbonization and catalysis, the cellulose raw material is subjected to a beating and fiberizing process to regulate and control the carbon fiber material in which cellulose-based carbon fibers are closely packed with each other after carbonization and catalysis. figure 1 It is the SEM picture of the carbon fiber raw material obtained through the beating and fiberizing process. On the other hand, the morphology and tap density of the subsequently prepared cellulose-based carbon fiber electrode material can be adjusted through ...

Embodiment 2

[0053] Embodiment 2 of the present invention provides a method for preparing cellulose-based carbon fibers on the one hand, comprising the following steps:

[0054] S100. Preparation of cellulose raw materials: directly take cellulose-rich materials from plants as raw materials, wash the raw materials, boil them with alkali, beat them into fibers, wash them until they are neutral, and dry them to obtain cellulose raw materials;

[0055] S101. Preparing the precursor: dissolving the catalyst organic cobalt salt in water at a ratio of 0.5:1 to 0.01:1 by mass ratio between the organic cobalt salt and the cellulose raw material, adding the cellulose raw material, the mass of the water and the cellulose raw material The ratio is 1:1~50:1, heating to boiling and maintaining the boiling state, evaporating the water to dryness, and drying to obtain the precursor;

[0056] S102. Carbonization catalytic graphitization treatment: the precursor is calcined, carbonized, and catalytically g...

Embodiment 3

[0065] Embodiment 3 of the present invention provides a method for preparing cellulose-based carbon fibers, comprising the following steps:

[0066] S100. Preparation of cellulose raw materials: directly take cellulose-rich materials from plants as raw materials, wash the raw materials, boil them with alkali, beat them into fibers, wash them until they are neutral, and dry them to obtain cellulose raw materials;

[0067] S101. Preparing the precursor: dissolving the catalyst organic nickel salt in water at a ratio of 0.5:1 to 0.01:1 by mass ratio of the organic nickel salt to the cellulose raw material, adding the cellulose raw material, and the mass ratio of the water to the cellulose raw material is 1:1~50:1, heating to boiling and maintaining the boiling state, evaporating the water to dryness, and drying to obtain the precursor;

[0068] S102, Carbonization Catalytic Graphitization Treatment The precursor is roasted, carbonized, and catalytically graphitized under an inert...

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

PropertyMeasurementUnit
diameteraaaaaaaaaa
specific surface areaaaaaaaaaaa
pore sizeaaaaaaaaaa
Login to view more

Abstract

The invention discloses cellulose-based carbon fibers, a preparation method thereof and a method for preparing an electrode material and belongs to the technical field of preparation of biomass cellulose based materials. The method comprises the steps: preparing a precursor: dissolving a catalyst in water according to a preset ratio, adding a cellulose raw material, carrying out heating until boiling, evaporating water to dryness under the condition of maintaining a boiling state, and carrying out baking, so as to obtain the precursor; carrying out carburizing, catalyzing and graphitizing treatment: roasting the precursor in an inert atmosphere for the carburizing, catalyzing and graphitizing treatment, so as to obtain a metal element containing cellulose-based carbon fiber composite material; removing impurities: repeatedly washing the cellulose-based carbon fiber composite material with hydrochloric acid so as to remove metal elements from the cellulose-based carbon fiber composite material, and then, carrying out baking, thereby obtaining the cellulose-based carbon fibers. By adopting cellulose in the natural world as a raw material, the sustainabiity of the carbon fibers and lithium-ion batteries is achieved.

Description

technical field [0001] The invention relates to the technical field of preparation of biomass cellulose-based carbon materials, in particular to a cellulose-based carbon fiber, a preparation method and a method for preparing electrode materials. Background technique [0002] Carbon materials are the mainstream of lithium-ion battery anode materials. In order to continue to improve the performance of lithium-ion batteries, new anode materials have become a research and development hotspot, among which fibrous carbon materials have been extensively studied. [0003] Compared with bulk and powder carbon materials, fibrous carbon materials have the following advantages as the negative electrode of lithium-ion batteries: First, fibrous carbon materials are easy to prepare into films and form self-supporting three-dimensional structures, which can be directly used as electrodes, and as electrodes The material forms a three-dimensional conductive network inside, without the need f...

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
Patent Type & Authority Applications(China)
IPC IPC(8): D01F9/16H01M4/587H01M10/0525
CPCD01F9/16H01M4/587H01M10/0525Y02E60/10
Inventor 尹周澜张东材郭华军李新海王志兴丁治英王接喜杨哲伟
Owner CENT SOUTH UNIV
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