Eureka AIR delivers breakthrough ideas for toughest innovation challenges, trusted by R&D personnel around the world.

A kind of negative electrode material of sodium ion battery and its preparation method and application

A sodium-ion battery and negative electrode material technology, which is applied in the direction of battery electrodes, negative electrodes, secondary batteries, etc., can solve the problems of limiting the application of negative electrode materials, poor conductivity, volume expansion, etc.

Active Publication Date: 2020-11-13
SHANDONG IND TECH RES INST OF ZHEJIANG UNIV
View PDF6 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the conductivity of tin dioxide itself is not strong, and it is accompanied by a large volume expansion during the charge-discharge cycle, which greatly limits its application as a negative electrode material in batteries.

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 negative electrode material of sodium ion battery and its preparation method and application
  • A kind of negative electrode material of sodium ion battery and its preparation method and application
  • A kind of negative electrode material of sodium ion battery and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0038] The present invention also provides the preparation method of the negative electrode material of the sodium ion battery according to the above technical solution, comprising the following steps:

[0039] Mix the tin source, molybdenum source, concentrated hydrochloric acid, thioglycolic acid, urea and water to obtain a mixed solution;

[0040] The sponge carbon is placed in the mixed solution, and hydrothermal reaction and sintering are performed in sequence to obtain a negative electrode material for a sodium ion battery.

[0041] In the present invention, unless otherwise specified, all raw materials are commercially available products well known to those skilled in the art.

[0042] In the present invention, a tin source, a molybdenum source, concentrated hydrochloric acid, thioglycolic acid, urea and water are mixed to obtain a mixed solution; in the present invention, the tin source is preferably stannous chloride, and the stannous chloride is preferably dihydrate ...

Embodiment 1

[0064] Under stirring conditions, 1 g of urea, 20 μL of thioglycolic acid and 1 mL of 37 wt% concentrated hydrochloric acid were added to 80 mL of water in sequence until uniform, and then 0.238 g (0.00105 mol) of stannous chloride dihydrate and 0.022 g (0.00009 mol) of stannous chloride were added in sequence. ) sodium molybdate dihydrate to obtain mixed solution;

[0065] Under ultrasonic conditions, the melamine sponge was cleaned with ethanol for 15 min, and then dried in vacuum; in an argon atmosphere, the temperature was raised to 800 °C at a heating rate of 5 °C / min, followed by high-temperature carbonization for 1 h, and then cooled; the cooled product was After hydrophilic treatment in plasma gas, soaked in 1 mol / L HCl solution, soaked at 35 °C for 24 h, and dried to obtain sponge carbon;

[0066] The sponge carbon (5.6g) of size 4cm*1cm*0.5cm was placed in 80mL of mixed solution, and after hydrothermal reaction (120°C, 12h), water cooling and filtration were performe...

Embodiment 2

[0072] Under stirring conditions, 1 g of urea, 20 μL of thioglycolic acid and 1 mL of 37 wt% concentrated hydrochloric acid were sequentially added to 80 mL of water until uniform, and then 0.357 g (0.00158 mol) of stannous chloride dihydrate and 0.022 g (0.00009 mol of ) sodium molybdate dihydrate to obtain mixed solution;

[0073] Under ultrasonic conditions, the melamine sponge was cleaned with ethanol for 15 min, and then dried in vacuum; in an argon atmosphere, the temperature was raised to 800 °C at a heating rate of 5 °C / min, followed by high-temperature carbonization for 1 h, and then cooled; the cooled product was After hydrophilic treatment in plasma gas, soaked in 1 mol / L HCl solution, soaked at 35 °C for 24 h, and dried to obtain sponge carbon;

[0074] The sponge carbon (5.2g) of size 4cm*1cm*0.5cm was placed in 80mL of mixed solution, and after hydrothermal reaction (120°C, 12h), water cooling and filtration were performed in turn, and deionized water and ethanol...

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
thicknessaaaaaaaaaa
particle diameteraaaaaaaaaa
thicknessaaaaaaaaaa
Login to View More

Abstract

The invention relates to the technical field of electrode materials and particularly relates to a negative electrode material of a sodium-ion battery and a preparation method thereof. The negative electrode material of the sodium-ion battery comprises sponge carbon and a molybdenum-doped tin dioxide nanosheet array grown in situ on a sponge carbon framework structure, and the mass percentage of the molybdenum-doped tin dioxide nanosheet array is 30% to 45% in the negative electrode material of the sodium-ion battery. According to the invention, the sponge carbon is used as a conductive framework, and the alleviation of the volume expansion of tin dioxide during a circulation process is helped. At the same time, molybdenum is doped in the tin dioxide to improve the conductivity of the tin dioxide, and the transmission of sodium ions in the negative electrode material of the sodium-ion battery is accelerated. Nanosheets increase the contact area between a composite material and an electrolyte, and the intercalation and de-intercalation of the sodium ions are more complete. According to a record of the embodiment, the negative electrode material of the sodium-ion battery has good cycle performance and rate performance.

Description

technical field [0001] The invention relates to the technical field of electrode materials, in particular to a negative electrode material for a sodium ion battery and a preparation method and application thereof. Background technique [0002] With the continuous development of the global economy and the continuous improvement of people's living standards, energy and environmental problems have become increasingly prominent. As a carrier of electrical energy storage, lithium-ion secondary batteries have been widely used in mobile phones, digital portable products and other fields due to their advantages of high energy density, long cycle life, small self-discharge effect, and environmental friendliness. However, due to the limited resources of lithium on earth, people have begun to look for new energy batteries that can replace lithium-ion batteries. In this context, sodium ions are considered as potential substitutes for lithium ions due to their similar physical and chemi...

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): H01M4/36H01M4/48H01M4/62H01M10/054
CPCH01M4/366H01M4/483H01M4/625H01M4/626H01M4/628H01M10/054H01M2004/021H01M2004/027Y02E60/10
Inventor 涂江平王敏雅杨涛王秀丽
Owner SHANDONG IND TECH RES INST OF ZHEJIANG 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
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