Preparation method and application of silicon oxycarbide/carbon composite micronano material

A silicon oxycarbide, micro-nano technology, applied in nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc., can solve the problems of optimization, unfavorable structural properties, microstructure and limited carbon content capacity, etc. The effect of good lithium battery performance, short time and easy operation

Active Publication Date: 2015-11-25
NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These methods have limited ability to control the microstructure and carbon content of silicon oxygen carbon / carbon composites, which is not conducive to further optimization of its structural properties and hinders its practical application as anode materials for lithium-ion batteries.

Method used

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  • Preparation method and application of silicon oxycarbide/carbon composite micronano material
  • Preparation method and application of silicon oxycarbide/carbon composite micronano material
  • Preparation method and application of silicon oxycarbide/carbon composite micronano material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Step (1). Add 2g photoinitiator phenyl bis(2,4,6-trimethylbenzoyl) phosphine oxide into 998g bisphenol A glycerol dimethacrylate solution and stir for 5 minutes at room temperature Obtain 1kg resin solution after;

[0023] Step (2). Take 200g of step (1) resin solution, add 12.5g of silane coupling agent hexadecyltrimethoxysilane and 12.5g of acrylic acid, and stir to obtain a mixed solution;

[0024] Step (3). Import the mixed solution obtained in step (2) into the silica gel template placed on the glass slide, and then cover a glass slide on top, cure for 2 minutes on the upper and lower sides, and then incubate at 30°C for 24 hours or more fully cured;

[0025] Step (4). The solid obtained in step (3) was placed in a corundum crucible, placed in a tube furnace, and calcined at 600° C. for 8 hours under an inert atmosphere to obtain a silicon oxycarbide / carbon composite powder.

[0026] In the silicon oxycarbide / carbon composite powder prepared in this example, the ...

Embodiment 2

[0028] Step (1). Add 20g of photoinitiator Yanjiagu 1173 into 980g of bisphenol A glycidyl methacrylate solution, and stir at room temperature for 5 minutes to obtain 1kg of resin solution;

[0029] Step (2). Take 200g of the resin solution in step (1), add 200g of silane coupling agent γ-(methacryloyloxy)propyltriethoxysilane, and 50g of methacrylic acid, and stir to obtain a mixed solution;

[0030] Step (3). Import the mixed solution obtained in step (2) into the silica gel template placed on the glass slide, and then cover a glass slide on the top, cure for 3 minutes on the upper and lower sides, and then incubate at 80°C for 6 hours or more fully cured;

[0031] Step (4). Put the solid obtained in step (3) in a corundum crucible, put it in a tube furnace, and calcinate at 1200° C. for 1 hour under an inert atmosphere to obtain a silicon oxycarbide / carbon composite powder.

Embodiment 3

[0033] Step (1). Add 5g of photoinitiator Yanjiagu 184 into 995g of urethane dimethacrylate solution, and stir at room temperature for 5 minutes to obtain 1kg of resin solution;

[0034] Step (2). Take 200g of step (1) resin solution, add 15g of silane coupling agent n-octyltrimethoxysilane and 2400g of acrylic acid, and stir to obtain a mixed solution;

[0035] Step (3). Import the mixed solution obtained in step (2) into the silica gel template placed on the glass slide, and then cover a glass slide on the top, cure for 2.5 minutes on the upper and lower sides, and then incubate at 40°C for 22 hours or more fully cured;

[0036] Step (4). The solid obtained in step (3) was placed in a corundum crucible, placed in a tube furnace, and calcined at 700° C. for 7.5 hours under an inert atmosphere to obtain a silicon oxycarbide / carbon composite powder. The XRD data prove that silicon oxycarbide particles are in an amorphous state and exist in a carbon matrix with a microcrystalli...

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Abstract

The invention discloses preparation method and application of a silicon oxycarbide / carbon composite micronano material. The preparation method comprises the following steps of mixing a thermosetting resin monomer and a photoinitiator according to a certain proportion to serve as a reaction medium and a carbon source; adding a siliane coupling agent; mixing the siliane coupling agent with the thermosetting resin monomer and the photoinitiator in a molecular level; calcining and reducing in an inert atmosphere by combining a photocuring polymerization method to obtain ultra small silicon oxide nano particles uniformly dispersed in a carbon substrate and having controlled morphology; and preparing to obtain the silicon oxycarbide / carbon composite micronano material. The preparation method is simple and feasible, operation time is short, post-treatment of the traditional organic solvent is avoided, and the silicon oxycarbide / carbon composite micronano material is green and environment friendly and has favorable performance when serving as an anode material of a lithium ion battery.

Description

technical field [0001] The invention belongs to the field of polymer materials, and relates to a preparation method of silicon oxycarbide / carbon composite micro-nano material, and an application of the prepared material in negative electrode materials of lithium ion batteries. Background technique [0002] Silicon oxycarbide is a ceramic material containing carbon elements, which can be obtained by thermal cracking of silicone resin or methyl silicic acid at 600 ° C to 1000 ° C in an inert atmosphere. It has excellent electrical insulation properties and thermal stability. [0003] In recent years, silicon oxycarbide made of polysiloxane has attracted the interest of many researchers in the field of lithium-ion batteries due to its good charge-discharge capacity and cycle performance. The silicon oxygen carbon network structure is very stable, and there is a small volume change in the process of charging and discharging, which can ensure the integrity of the electrode materi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/131H01M4/133H01M4/1391H01M4/1393B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00H01M4/131H01M4/133H01M4/1391H01M4/1393Y02E60/10
Inventor 程亚军王梅梅朱锦
Owner NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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