Unlock instant, AI-driven research and patent intelligence for your innovation.

A kind of preparation method of porous carbon skeleton coated tin composite electrode material

A composite electrode and porous carbon technology, applied to battery electrodes, circuits, electrical components, etc., can solve the problems of time and energy consumption, complicated preparation operations, poor specific capacity and rate characteristics, etc., to increase chemical reaction sites, Effects of avoiding agglomeration and reducing charge transfer impedance

Active Publication Date: 2022-02-08
UNIV OF ELECTRONICS SCI & TECH OF CHINA +1
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the problems of complex preparation operation, time-consuming and energy-consuming, and poor specific capacity and rate characteristics of the existing tin-carbon composite materials, the present invention provides a preparation method of a porous carbon skeleton-coated tin composite electrode material, based on which the obtained The particle size of tin dioxide is less than 10nm, and the specific capacity and rate characteristics are good

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
  • A kind of preparation method of porous carbon skeleton coated tin composite electrode material
  • A kind of preparation method of porous carbon skeleton coated tin composite electrode material
  • A kind of preparation method of porous carbon skeleton coated tin composite electrode material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] This embodiment provides a preparation method of a N-doped porous tin-carbon negative electrode material for lithium ion batteries. The method also considers the performance of the material, the synthesis process and its cost. The raw materials include anhydrous tin tetrachloride, acrylamide, N,N'-methylenebisacrylamide, ammonium persulfate; specifically comprise the following steps:

[0033] (1) using anhydrous tin tetrachloride as a tin source, measuring an appropriate amount of anhydrous tin tetrachloride and dissolving it in deionized water, forming a uniform and transparent solution under stirring conditions, and preparing a 2.8mol / L tin chloride aqueous solution, placed to cool;

[0034] (2) adding acrylamide, N,N'-methylenebisacrylamide and ammonium persulfate in the tin tetrachloride aqueous solution of 20ml, wherein the mass ratio of acrylamide and anhydrous tin tetrachloride is 1:15, The amount of ammonium persulfate used is 2.5% of the mass of acrylamide, an...

Embodiment 2

[0038] This embodiment provides a preparation method of a N-doped porous tin-carbon negative electrode material for lithium ion batteries. The method also considers the performance of the material, the synthesis process and its cost. The raw materials include anhydrous tin tetrachloride, acrylamide, N,N'-methylenebisacrylamide, sodium persulfate; specifically comprise the following steps:

[0039] (1) using anhydrous tin tetrachloride as a tin source, measuring an appropriate amount of anhydrous tin tetrachloride and dissolving it in deionized water, forming a uniform and transparent solution under stirring conditions, and preparing a 4.2 mol / L tin chloride aqueous solution, placed to cool;

[0040] (2) adding acrylamide, N,N'-methylenebisacrylamide and sodium persulfate in the tin tetrachloride aqueous solution of 20ml, wherein the mass ratio of acrylamide and anhydrous tin tetrachloride is 1:12, The amount of sodium persulfate used is 4% of the mass of acrylamide, and the m...

Embodiment 3

[0048] This embodiment provides a preparation method of a N-doped porous tin-carbon negative electrode material for lithium ion batteries. The method also considers the performance of the material, the synthesis process and its cost. The raw materials include anhydrous tin tetrachloride, acrylamide, N,N'-methylenebisacrylamide, sodium persulfate; specifically comprise the following steps:

[0049] (1) Using crystalline tin tetrachloride as the tin source, take an appropriate amount of crystalline tin tetrachloride and dissolve it in deionized water, form a uniform and transparent solution under stirring conditions, prepare a 1.5 mol / L tin chloride aqueous solution, and place it to cool ;

[0050] (2) adding acrylamide, N,N'-methylenebisacrylamide and sodium persulfate to the tin tetrachloride aqueous solution of 20ml, wherein the mass ratio of acrylamide and crystalline tin tetrachloride is 1:8, and the Potassium sulfate and sodium bisulfite (K 2 S 2 O 8 / NaHSO 3 ) is 1% ...

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
particle diameteraaaaaaaaaa
Login to View More

Abstract

The invention discloses a method for preparing a porous carbon skeleton-coated tin composite electrode material, which belongs to the technical field of electrode material preparation. The invention adopts water-soluble tin source, acrylamide, cross-linking agent and initiator to prepare a gel precursor solution and polymerize to form a gel with a three-dimensional network structure, and then conduct low-temperature carbonization treatment on the gel to obtain a tin-based carbon composite electrode Material. The present invention prepares polyacrylamide gel composite tin source and effectively disperses it, and the carbon skeleton formed by low-temperature carbonization can fix tin dioxide nanoparticles, which improves the phenomenon that the volume expansion of tin-based materials is large and easily causes pulverization during charging and discharging. ; and polyacrylamide provides carbon source while doping nitrogen atoms in situ, which helps to improve the conductivity of the material; the particle size of tin dioxide generated is less than 10nm, which is conducive to increasing chemical reaction sites, showing high specific capacity, Large energy density and good rate performance; Compared with the existing technology, it has the advantages of simple preparation process, low preparation temperature and low process cost, and is easy to industrialized large-scale production.

Description

technical field [0001] The invention belongs to the technical field of electrode material preparation, and in particular relates to a preparation method of a porous carbon skeleton-coated tin composite electrode material. Background technique [0002] At present, the field of new energy technology has become the focus of active research in countries all over the world. With the reduction of non-renewable energy and serious environmental problems, the development and utilization of new energy has become urgent. With the development of new energy, the problem of energy storage and conversion has appeared. There is a growing interest in chemical energy storage devices. As an important energy storage and conversion device, chemical energy storage devices can be widely used in various aspects due to their advantages of high energy density, convenient use, high energy conversion efficiency, low pollution, and ability to withstand the test of various environments. As an indispens...

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 Patents(China)
IPC IPC(8): H01M4/36H01M4/48H01M4/583H01M10/0525
CPCY02E60/10
Inventor 吴孟强李文磊徐自强廖家轩冯婷婷周海平巩峰陈治马云飞李湜
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA