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

Two-dimensional porous graphitized carbon-coated nickel-tin alloy material and preparation and application thereof

A nickel-tin alloy and graphitized carbon technology, which is applied in electrical components, battery electrodes, circuits, etc., can solve the problems of unsatisfactory electrode cycle performance and rate performance, unfavorable lithium ion and electron transmission, and low degree of graphitization of carbon materials. , to achieve the effect of excellent shape, strong controllability and good cycle performance

Inactive Publication Date: 2014-04-16
TIANJIN UNIV
View PDF6 Cites 31 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The composite materials prepared by it are usually three-dimensional scale (Sn or Sn-based alloy is embedded in or supported on the surface of the three-dimensional carbon block) (Adv. Mater.2008, 20, 3169–3175), but on the one hand The catalytic performance of tin-based alloys on carbon is low, and the degree of graphitization of the obtained carbon materials is low; on the other hand, the obtained composite materials are generally three-dimensional structures, which are not conducive to the transmission of lithium ions and electrons, so that the cycle performance and rate performance of the electrode are still low. not ideal

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
  • Two-dimensional porous graphitized carbon-coated nickel-tin alloy material and preparation and application thereof
  • Two-dimensional porous graphitized carbon-coated nickel-tin alloy material and preparation and application thereof
  • Two-dimensional porous graphitized carbon-coated nickel-tin alloy material and preparation and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Weigh 2.5g citric acid, 0.495g nickel nitrate and 9.8gNaCl, dissolve the mixture in 50ml of deionized water, stir and dissolve with a magnetic stirrer with a stirring speed of 300r / min to form a solution, and then use a 400W ultrasonic Sonicate for 15 minutes and mix well. Put the mixed solution into a vacuum drying oven at 80° C. for vacuum drying until a mixture is obtained. Grind the mixture, take 6g of the mixed powder and put it in the ark A, put the ark in the tube furnace, take 1g of stannous chloride and put it in the ark B, put the ark B into the tube furnace, make it stick to the ark A , 200ml / min of Ar inert gas was introduced for 30min to exclude the air, and then the temperature was raised to 650℃ with 200ml / min of Ar inert gas at a heating rate of 10℃ / min, and the temperature was kept for 0.5h for carbonization and gas phase exchange reaction. After completion, it was cooled to room temperature under the protection of Ar atmosphere to obtain a calcined pr...

Embodiment 2

[0027]Weigh 5g of citric acid, 0.495g of nickel nitrate and 19.6g of NaCl, dissolve the mixture in 100ml of deionized water, stir and dissolve with a magnetic stirrer at a stirring speed of 300r / min to form a solution, and then use a 400W ultrasonic Sonicate for 15 minutes and mix well. Put the mixed solution into a vacuum drying oven at 80° C. for vacuum drying until a mixture is obtained. Grind the mixture, take 10g of the mixed powder and put it in the ark A, put the ark in the tube furnace, take 1g of stannous chloride and put it in the ark B, put the ark B into the tube furnace so that it sticks to the ark A , pass 200ml / min of Ar inert gas to exclude air, then use 200ml / min of Ar inert gas at a heating rate of 10°C / min to raise the temperature to 750°C, keep warm for 1h for carbonization and gas phase exchange reaction, after the reaction Cool to room temperature under the protection of Ar atmosphere to obtain a calcined product. Collect the calcined product, grind it ...

Embodiment 3

[0029] Weigh 1.25g citric acid, 0.495g nickel nitrate and 9.8gNaCl, dissolve the mixture in 50ml of deionized water, stir and dissolve with a magnetic stirrer with a stirring speed of 300r / min to form a solution, and then use a 400W ultrasonic Sonicate for 15 minutes and mix well. Put the mixed solution into a vacuum drying oven at 80° C. for vacuum drying until a mixture is obtained. Grind the mixture, take 12g of the mixed powder and put it in the ark A, put the ark in the tube furnace, take 1g of stannous chloride and put it in the ark B, put the ark B into the tube furnace, make it stick to the ark A , pass 200ml / min of Ar inert gas to exclude air, then use 200ml / min of Ar inert gas at a heating rate of 10°C / min to raise the temperature to 700°C, keep warm for 1.5h for carbonization and gas phase exchange reaction, and the reaction is over Afterwards, it was cooled to room temperature under the protection of Ar atmosphere to obtain a calcined product. Collect the calcine...

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 discloses a two-dimensional porous graphitized carbon-coated nickel-tin alloy material and preparation and application thereof. Carbon-coated nickel-tin alloy nano-particles are uniformly embedded into two-dimensional porous graphitized carbon plates to form the material. A preparation procedure for the material includes utilizing NaCl as a dispersing agent and a carrier, dissolving the NaCl in a nickel source and a carbon source, mixing the NaCl, the nickel source and the carbon source, drying the NaCl, the nickel source and the carbon source under a vacuum condition and finely grinding the NaCl, the nickel source and the carbon source to obtain a mixture; placing the mixture and a tin source to be subjected to gas-phase exchange into a tube furnace, and calcining the mixture and the tin source under the protection of inert gas to obtain a calcined product; washing the calcined product to obtain the two-dimensional porous graphitized carbon-coated nickel-tin alloy material. The two-dimensional porous graphitized carbon-coated nickel-tin alloy material, the preparation and the application have the advantages that the preparation procedure is safe and harmless, operation is simple, the yield is high, and the prepared two-dimensional porous graphitized carbon-coated nickel-tin alloy material which is used as a cathode material of a lithium ion battery is high in reversible capacity and cycle stability.

Description

technical field [0001] The invention relates to a two-dimensional porous graphitized carbon-coated nickel-tin alloy material and its preparation and application, belonging to the technical field of lithium-ion secondary battery electrode materials. Background technique [0002] Lithium-ion batteries have the characteristics of light weight, large capacity, wide operating temperature range, low self-discharge rate, no environmental pollution, no memory effect, etc., so they have been widely used. Many current digital devices use lithium-ion batteries as power sources, and in recent years, as the new generation of hybrid electric vehicles (HEV) and pure electric vehicles (EV) have received increasing attention, lithium-ion batteries as their main power sources have increasingly become a technology hotspot. [0003] At present, the anode materials of lithium-ion batteries used in industry are carbon materials (artificial graphite, natural graphite), and their theoretical capa...

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): B22F1/02C22C1/08H01M4/38H01M4/62
CPCY02E60/10
Inventor 何春年秦戬赵乃勤师春生刘恩佐李家俊
Owner TIANJIN UNIV
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