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

A kind of ferrocyanide cathode material and its preparation method and application

A positive electrode material, ferrocyanide-based technology, applied in the direction of ferricyanide, battery electrodes, metal cyanide, etc., can solve the problems of low capacity of sodium-ion batteries, poor crystallinity of ferrocyanide, and unsatisfactory cycle stability. Achieve the effect of simple process, short cycle time and good crystallinity

Active Publication Date: 2019-07-16
ZHEJIANG UNIV
View PDF6 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] But also because of this, the prepared ferrocyanide generally has poor crystallinity, which leads to the low capacity and unsatisfactory cycle stability of the sodium-ion battery assembled as the positive electrode material.

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 ferrocyanide cathode material and its preparation method and application
  • A kind of ferrocyanide cathode material and its preparation method and application
  • A kind of ferrocyanide cathode material and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Sodium ferrocyanide is dissolved in deionized water, and stirred evenly to obtain solution A whose concentration is 0.1mol / L in terms of ferrocyanide ion; manganous chloride is dissolved in deionized water, and stirred evenly to obtain 2+ Solution B whose meter concentration is 0.2mol / L, wherein the molar weight of manganous chloride is 2.5 times of sodium ferrocyanide, then sodium hydroxide is added in the solution B and stirred (sodium hydroxide and manganous chloride The molar ratio is 2.5:1), to get Mn(OH) 2 Suspension C: Mix solution A and suspension C, add acetic acid, the molar amount of acetic acid is 5 times that of manganese chloride, undergo a hydrothermal reaction at 90°C for 8 hours, then cool, wash and dry to obtain a ferrocyanide positive electrode Material. Through ICP analysis, the x value of the product is 1.7, the y value is 0.8, the lattice structure is rhombohedral phase, and the particle size is 200-400 nm.

[0035] figure 1 For the X-ray diffra...

Embodiment 2

[0047] Dissolve sodium ferrocyanide in deionized water and stir evenly to obtain solution A with a concentration of 0.2 mol / L in terms of ferrocyanide ion; dissolve manganous sulfate and ferrous chloride with a molar ratio of 1:1 in In deionized water, stir evenly to obtain Mn 2+ and Fe 2+ A total concentration of 0.4mol / L solution B (wherein the total molar weight of manganese sulfate and ferrous chloride is 3 times that of sodium ferrocyanide), then sodium hydroxide is added to solution B and stirred (hydroxide The total molar ratio of sodium to manganous sulfate and ferrous chloride is 3:1), to obtain Mn 0.5 Fe 0.5 (OH) 2 Suspension C: Mix solution A and suspension C, add tartaric acid, the molar amount of tartaric acid is 4 times that of manganese chloride, undergo hydrothermal reaction at 80°C for 10 hours, then cool, wash and dry to obtain a ferrocyanide positive electrode material, the chemical formula is Na x M[Fe(CN) 6 ] y , where, x=1.65, y=0.75; the lattice s...

Embodiment 3

[0050] Sodium ferrocyanide is dissolved in deionized water, and stirred evenly to obtain solution A whose concentration is 0.3mol / L in terms of ferrocyanide ion; ferrous chloride is dissolved in deionized water, stirred evenly to obtain 2+ The solution B whose meter concentration is 0.65mol / L, wherein the molar weight of ferrous chloride is 2.5 times of sodium ferrocyanide, then sodium hydroxide is added in the solution B and stirred (sodium hydroxide and ferrous chloride The molar ratio is 2.5:1), to get Fe(OH) 2 Suspension C: Mix solution A and suspension C, add propionic acid, the molar weight of propionic acid is 3 times that of ferrous chloride, undergo hydrothermal reaction at 90°C for 10 hours, then cool, wash and dry to obtain ferrocyanide Based cathode material, the chemical formula is Na x M[Fe(CN) 6 ] y , where, x=1.62, y=0.76; the lattice structure is rhombohedral phase, and the particle size is 200-400nm.

[0051] The ferrocyanogen-based material prepared in t...

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
sizeaaaaaaaaaa
Login to View More

Abstract

The invention discloses a preparation method of a ferrocyanogen positive material. The preparation method specifically comprises the following steps: mixing sodium ferrocyanide with deionized water to obtain a solution A; mixing a soluble salt of divalent transition metal ions M<2+> with deionized water to obtain a solution B, and then adding a precipitator to obtain an M(OH)2 suspension liquid; mixing the solution A and the M(OH)2 suspension liquid, then adding weak avid, and carrying out a hydrothermal reaction to obtain the ferrocyanogen positive material. According to the preparation method of the ferrocyanogen positive material disclosed by the invention, the method can regulate and control the morphology and crystal structure of the target product, the prepared ferrocyanogen positive material has good crystallinity, the material is applied into sodium-ion battery electrodes, and the electrochemical performance of sodium-ion batteries can be obviously improved.

Description

technical field [0001] The invention relates to the technical field of novel energy storage batteries, in particular to a ferrocyanide positive electrode material and its preparation method and application. Background technique [0002] Lithium-ion batteries are now widely used in mobile electronic devices, such as smartphones, laptops, etc., and have huge markets in grid energy storage, electric vehicles. However, with the popularization of lithium-ion batteries, especially large-scale use in electric vehicles, the consumption of lithium resources is also huge. However, the reserves of lithium resources are limited, and there is currently no effective and economical technology for the recovery of lithium elements in waste lithium-ion batteries. In contrast, the reserves of sodium on the earth are much higher than that of lithium, and the price is much lower than that of lithium. Therefore, in recent years, sodium-ion batteries have attracted much attention. It is general...

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): H01M4/58H01M10/054C01C3/12
CPCC01C3/12H01M4/58H01M10/054Y02E60/10
Inventor 谢健沈志龙孙云坡曹高劭赵新兵
Owner ZHEJIANG 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