Binary transition metal oxide and graphene oxide composite material, preparation method thereof and sodium ion battery

A technology of transition metals and composite materials, applied in secondary batteries, nanotechnology for materials and surface science, battery electrodes, etc., can solve problems such as unsatisfactory cycle performance

Inactive Publication Date: 2019-11-26
GUANGDONG UNIV OF TECH
View PDF2 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The invention provides a binary transition metal oxide and graphene oxide composite material and its preparation method and a sodium ion battery, which solves the problem of volume effect in the charging and discharging process of the transition metal oxide as the negative electrode material of the sodium ion battery , resulting in unsatisfactory cycle performance

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
  • Binary transition metal oxide and graphene oxide composite material, preparation method thereof and sodium ion battery
  • Binary transition metal oxide and graphene oxide composite material, preparation method thereof and sodium ion battery
  • Binary transition metal oxide and graphene oxide composite material, preparation method thereof and sodium ion battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] This example is to prepare FeCoO x Specific examples of Product 1 of electrode materials.

[0046] Add 3 mmol of cobalt nitrate hexahydrate into 50 mL of deionized water and sonicate for 30 min until uniformly mixed to obtain the first product 1;

[0047] Then add 4.5mmol of sodium citrate and 2mmol of potassium ferricyanide to the first product 1 in sequence, and ultrasonicate for 30min until the mixture is homogeneous. After 3 times of deionized filtration and washing, the soaking time was 1 hour each time, and freeze-dried at -30°C for 12 hours, the second product 1 was obtained, which was the iron-cobalt Prussian blue analogue;

[0048] After grinding the obtained second product 1, the second product 1 was heated to 500°C at 2°C / min in a tube furnace with nitrogen gas, kept for 5 hours for heat treatment, and product 1 was obtained after cooling, namely FeCoO x Material.

[0049] figure 2 For this example FeCoO x Scanning electron microscope images, such as ...

Embodiment 2

[0051] This example is to prepare FeCoO x A specific example of product 2 of graphene oxide (GO) composite electrode material.

[0052] Mix 3 mmol of cobalt nitrate hexahydrate and 1 mg / mL of graphene oxide dispersion to obtain the first product 2;

[0053] Add deionized water to the first product 2 to 50mL, sonicate for 30min until mixed evenly, then add 4.5mmol sodium citrate and 2mmol potassium ferricyanide in turn, sonicate for 30min until mixed evenly, after hydrothermal reaction at 120°C for 12h , the obtained product was soaked and washed in deionized water for 3 times, the soaking time was 1h each time, and after freeze-drying at -30°C for 12h, the second product 2 was obtained, that is, the iron-cobalt Prussian blue analogue / GO composite material, in which the iron-cobalt The particle size of the Prussian blue analogue is 60-150nm;

[0054] After grinding the obtained second product 2, the second product 2 was heated to 500°C at 2°C / min in a tube furnace with nitrog...

Embodiment 3

[0056] This example is to prepare FeCoO x A specific example of product 3 of the / GO composite electrode material.

[0057] 3mmol of cobalt nitrate hexahydrate and 2mg / mL of graphene oxide dispersion were mixed to obtain the first product 3;

[0058] Add deionized water to the first product 3 to 50mL, sonicate for 30min until mixed evenly, then add 4.5mmol sodium citrate and 2mmol potassium ferricyanide in turn, sonicate for 30min until mixed evenly, after hydrothermal reaction at 120°C for 12h , the obtained second product 3 was soaked and washed in deionized water three times, the soaking time was 1 hour each time, and freeze-dried at -30°C for 12 hours to obtain the second product 3, that is, the iron-cobalt Prussian blue analogue / GO composite material, Wherein the particle size of the iron-cobalt Prussian blue analogue is 60-150nm;

[0059] After grinding the obtained second product 3, the temperature of the second product 3 was raised to 500 °C at 2 °C / min in a tube fur...

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
concentrationaaaaaaaaaa
particle diameteraaaaaaaaaa
Login to view more

Abstract

The invention relates to the technical field of battery materials, in particular to a binary transition metal oxide and graphene oxide composite material, a preparation method thereof and a sodium ionbattery. According to the preparation method of the binary transition metal oxide and graphene oxide composite material, Prussian blue analogue is grown in situ on the surface of the graphene oxide after a hydrothermal reaction, so that the Prussian blue analogue is more tightly combined with the graphene oxide, and then the battery is more stable in the charging and discharging process, so thatthe electrochemical performance of the graphene oxide composite material is improved. After the graphene oxide is subjected to the hydrothermal reaction, three-dimensional graphene oxide is obtained,so that the specific surface area of the composite material is increased, and therefore the volume expansion of the binary transition metal oxide is effectively relieved, meanwhile, agglomeration of the binary transition metal oxide is effectively prevented, and the electrical conductivity and the cycling performance of the composite material are improved.

Description

technical field [0001] The invention relates to the technical field of battery materials, in particular to a binary transition metal oxide and graphene oxide composite material, a preparation method thereof, and a sodium ion battery. Background technique [0002] Environmental issues are one of the most concerned issues in today's society. Among them, the development of the energy field has a huge impact on the environment. The problem of the depletion of fossil energy such as fossils cannot be ignored. Find alternative, environmentally friendly and sustainable energy as soon as possible. It is our urgent research task. At present, the most efficient lithium-ion battery is lithium-ion battery, but the development of lithium battery will be limited in the future due to the reserve and cost of lithium. Sodium is one of the abundant resources in nature and has similar chemical properties to lithium. , so it has the same working principle as lithium-ion batteries, and the chargi...

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 Applications(China)
IPC IPC(8): H01M4/36H01M4/52H01M4/62H01M10/054B82Y30/00
CPCB82Y30/00H01M4/366H01M4/523H01M4/625H01M4/628H01M10/054H01M2004/021H01M2004/027Y02E60/10
Inventor 唐玉蝶张海燕程奥陈建飞
Owner GUANGDONG UNIV OF TECH
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
Try Eureka
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap