Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

A preparation method of nano-sic that can be used as negative electrode material of lithium ion battery and lithium ion battery prepared by using the negative electrode material

A technology for lithium-ion batteries and negative electrode materials, applied to the preparation of nano-SiC, lithium-ion batteries. field, can solve the problems of lack of purity, high cost, complex synthesis route, etc., and achieve the effects of stable charge and discharge performance, uniform element distribution, and high volume capacity

Active Publication Date: 2021-12-21
TIANNENG SAFT ENERGY JOINT CO
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the methods mentioned above, physical and chemical vapor deposition, sol-gel method and other preparation methods have not been able to achieve large-scale commercial application due to the complexity of the synthetic route and high cost.
At present, the main commercial production method of SiC is the carbothermal reduction method. In this method, quartz sand and coke need to undergo a reduction reaction above 2500°C to form SiC. A few percent, the lack of purity is obvious, it is difficult to generate high value-added nano-SiC powder

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 preparation method of nano-sic that can be used as negative electrode material of lithium ion battery and lithium ion battery prepared by using the negative electrode material
  • A preparation method of nano-sic that can be used as negative electrode material of lithium ion battery and lithium ion battery prepared by using the negative electrode material
  • A preparation method of nano-sic that can be used as negative electrode material of lithium ion battery and lithium ion battery prepared by using the negative electrode material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] First weigh 98 parts of isopropanol, 1 part of polyvinyl alcohol, and 0.5 parts of polyethylene glycol, put them into a ball mill tank, stir them properly with a glass rod, and then weigh 10 parts of SiO 2 The powder and 15 parts of graphite powder should be properly stirred with a glass rod and then ball milled. After being fully dispersed, take it out and dry it in a drying oven at 100°C. Press it into a 0.4g round cake with a diameter of 12mm under a pressure of 5MPa. , transferred to a high-temperature oven for sintering at 1200°C, the sintering time is 2.5h, and the sintering atmosphere is Ar+3vt%H 2 , In addition, take 550g CaCl 2 • 2H 2 O was dried in air at 180°C for 48h and then vacuum-dried at the same temperature for 24h, or air-dried at 260°C for 12h and then vacuum-dried at the same temperature for 6h to obtain CaCl 2 , weigh the CaCl prepared in the previous step 2 About 400g is placed in an alumina crucible, and then placed in a vertical high-temperatu...

Embodiment 2

[0050] First weigh 99 parts of isopropanol, 1.2 parts of polyvinyl alcohol, and 1 part of polyethylene glycol, put them into a ball mill tank and stir them properly with a glass rod, then weigh 5 parts of SiO 2 The powder and 8 parts of graphite powder are properly stirred with a glass rod and then ball milled. After being fully dispersed and uniform, they are taken out and dried in an oven at 110°C. Under a pressure of 8MPa, they are pressed into a 1g round cake with a diameter of 18mm. Transfer to a high temperature oven for sintering at 1250°C, the sintering time is 3h, and the sintering atmosphere is Ar+4vt%H 2 , In addition, take 550g CaCl 2 2H 2 O was dried in air at 180°C for 48h and then vacuum-dried at the same temperature for 24h, or air-dried at 280°C for 12h and then vacuum-dried at the same temperature for 6h to obtain CaCl 2 , weigh the CaCl prepared in the previous step 2 About 400g is placed in an alumina crucible, and then placed in a vertical high-tempera...

Embodiment 3

[0053] First weigh 100 parts of isopropanol, 1.5 parts of polyvinyl alcohol, and 1 part of polyethylene glycol, put them into a ball mill tank and stir them properly with a glass rod, and then weigh 10 parts of SiO 2 The powder and 15 parts of graphite powder are properly stirred with a glass rod and then ball milled. After being fully dispersed, take it out and put it in an oven for drying at 120°C. Press it into a 2g round cake with a diameter of 25mm under a pressure of 10MPa. Transfer to a high-temperature oven for sintering at 1300°C, the sintering time is 2.5h-3.5h, and the sintering atmosphere is Ar+6vt%H 2 , In addition, take 550g CaCl 2 2H2O was dried in air at 200°C for 48h and then vacuum-dried at the same temperature for 24h, or air-dried at 300°C for 12h and then vacuum-dried at the same temperature for 6h to obtain CaCl 2 , weigh the CaCl prepared in the previous step 2 About 400g is placed in an alumina crucible, and then placed in a vertical high-temperature...

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 preparation method of nano-SiC which can be used as negative electrode material of lithium ion battery, and belongs to the technical field of lithium ion battery. A preparation method of nano-SiC that can be used as the negative electrode material of lithium ion battery, SiO 2 , graphite, isopropanol, polyvinyl alcohol, and polyethylene glycol are mixed, dried and sintered into SiO 2 / graphite mixture, followed by molten CaCl 2 Conduct electro-deoxidation to synthesize nano-SiC materials, which have unique nanowire morphology and uniform element distribution, exhibit stable charge-discharge performance, and have higher specific capacity and volume capacity than graphite materials, which can become potentially competitive for lithium-ion batteries The negative electrode material can achieve the effect of simple preparation process, relatively low cost and low energy consumption, and can realize large-scale production with high selectivity by controlling the process conditions, which solves the problem of the production temperature when preparing SiC by the current conventional carbothermal reduction method Higher, high product impurity content and difficult to batch production and other issues.

Description

technical field [0001] The invention relates to the technical field of lithium ion batteries, and more specifically, relates to a method for preparing nano-SiC that can be used as a negative electrode material for lithium ion batteries and a lithium ion battery prepared by using the negative electrode material. Background technique [0002] Lithium-ion batteries dominate the power supply market for portable electronic devices due to their good overall performance, including high operating voltage, high energy density, low self-discharge, and design flexibility. As one of the essential components of lithium-ion batteries, the anode active material must be able to conduct ions and electrons, and be able to accommodate a large amount of Li in the structure in a reversible manner. Because the chemical activity of Li embedded in it is only slightly lower than that of Li in the single state, and the volume change is relatively small during the charge-discharge cycle, graphite mate...

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): C01B32/97H01M4/583H01M10/0525B82Y30/00B82Y40/00
CPCC01B32/97H01M4/583H01M10/0525B82Y30/00B82Y40/00H01M2004/021H01M2004/027C01P2004/03C01P2006/40Y02E60/10
Inventor 郭鑫陈挺娴周翠芳周建中李明钧林志菲陈飞
Owner TIANNENG SAFT ENERGY JOINT CO
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com