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

Ti<4+> and Cr<3+>-doped iron trifluoride composite material and preparation method therefor, and lithium ion battery

A lithium-ion battery and composite material technology, which is applied in the field of Ti4+, Cr3+-doped ferric trifluoride composite material and its preparation, can solve the problems of poor stability, poor conductivity and dynamic properties of ferric fluoride materials, and material rate performance low level problem

Inactive Publication Date: 2016-09-21
GUANGDONG UNIV OF TECH
View PDF7 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the poor conductivity and dynamic properties of ferric fluoride materials lead to the disadvantages of low rate performance and poor stability of the material, which limits its practical application.

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
  • Ti&lt;4+&gt; and Cr&lt;3+&gt;-doped iron trifluoride composite material and preparation method therefor, and lithium ion battery
  • Ti&lt;4+&gt; and Cr&lt;3+&gt;-doped iron trifluoride composite material and preparation method therefor, and lithium ion battery
  • Ti&lt;4+&gt; and Cr&lt;3+&gt;-doped iron trifluoride composite material and preparation method therefor, and lithium ion battery

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0053] The invention provides a doped Ti 4+ 、Cr 3+ The preparation method of ferric trifluoride composite material, comprises the following steps:

[0054] A) After mixing and grinding trivalent iron source, tetravalent titanium source, trivalent chromium source, fluoride, alcohol solution and grinding aids, a semi-finished composite material is obtained;

[0055] B) After heat-treating the composite material semi-finished product obtained in the above steps, doped Ti 4+ 、Cr 3+ ferric trifluoride composite material.

[0056] The invention first mixes and grinds trivalent iron source, tetravalent titanium source, trivalent chromium source, fluoride, alcohol solution and grinding aid to obtain a composite material semi-finished product. In the present invention, the selection range and sources of the trivalent iron source, tetravalent titanium source, trivalent chromium source, and fluoride are preferred principles. 4+ 、Cr 3+ The raw materials in the ferric trifluoride com...

Embodiment 1

[0072] The doped Ti prepared in this embodiment 4+ 、Cr 3+ FeF 3 The chemical formula of the nanocomposite cathode material is Fe 0.96 Cr 0.02 Ti 0.015 f 3 .

[0073]Weigh iron nitrate, chromium chloride, titanium nitrate and ammonium fluoride according to the molar amounts of Fe, Cr, Ti and F in the above chemical formula, carry out batching, obtain mixture one after mechanical grinding, then mix mixture one and grinding aid SiC Mix again according to the mass ratio of 1:0.02 to obtain mixture 2, and add enough dispersant ethanol solution to immerse mixture 2 and mix evenly to obtain the final mixture.

[0074] Put the final mixture obtained in the above steps at room temperature and under the protection of nitrogen in a high-energy ball mill at a speed of 250r / min. After ball milling for 10 hours, take out the material, and then put it into a vacuum tube-type atmosphere furnace protected by argon to raise the temperature to 300°C. After cooling at constant temperature ...

Embodiment 2

[0081] The doped Ti prepared in this embodiment 4+ 、Cr 3+ FeF 3 The chemical formula of the nanocomposite cathode material is Fe 0.91 Cr 0.05 Ti 0.03 f 3 .

[0082] Weigh iron nitrate, chromium chloride, titanium nitrate and ammonium fluoride according to the molar amounts of Fe, Cr, Ti and F in the above chemical formula, carry out batching, obtain mixture one after mechanical grinding, then mix mixture one and grinding aid SiC Mix again according to the mass ratio of 1:0.03 to obtain mixture 2, and add enough dispersant ethanol solution to immerse mixture 2 and mix evenly to obtain the final mixture.

[0083] Put the final mixture obtained in the above steps at room temperature and under the protection of nitrogen in a high-energy ball mill at a speed of 350r / min. After ball milling for 15 hours, take out the material, and then put it into a vacuum tube-type atmosphere furnace protected by argon to heat up to 350°C. After cooling at constant temperature for 6 hours, 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
Granularityaaaaaaaaaa
Discharge capacityaaaaaaaaaa
Discharge capacityaaaaaaaaaa
Login to View More

Abstract

The invention provides a Ti<4+> and Cr<3+>-doped iron trifluoride composite material. The Ti<4+> and Cr<3+>-doped iron trifluoride composite material has the chemical formula as shown in the formula (I), Fe<1 x y>Cr<x>Ti<0.75y>F<3> (I), wherein x is equal to 0.02-0.07; y is equal to 0.02-0.06; and x plus y is less than 1. According to the composite material, the lattice parameters of the crystals are adjusted through the doped Ti<4+> and Cr<3+>, so that the diffusion performance of the lithium ions is obliviously improved; meanwhile, the quantity of conductive ions in the conductive band is increased, and the conductivity is enhanced; the composite material provided by the invention has a relatively large specific surface area, so that the contact area between the active material and the electrolyte is enlarged, and the electrochemical activity is enhanced consequently; the diffusion channel of the Li<+> is reduced, the charge-discharge rate is improved, and the rate capability is enhanced; in addition, the nanometer composite material can obviously improve the inner stress of the material generated by the volume change in the lithium intercalation and deintercalation processes, so that the cycling performance of the active material is improved.

Description

technical field [0001] The invention relates to the technical field of lithium ion batteries, in particular to a Ti-doped 4+ 、Cr 3+ The ferric trifluoride composite material and its preparation method, lithium ion battery. Background technique [0002] At present, mineral resources are gradually depleted and environmental pollution is increasing, so it is an urgent problem to explore alternative and non-polluting new energy sources. Although renewable energy such as solar energy, wind energy, water energy, and biomass energy have made great progress, problems such as high cost and geographical restrictions have restricted them from becoming the main energy source; urban air pollution caused by automobile exhaust is becoming more and more serious, and electric vehicles The development of new energy vehicles such as (EV) and hybrid electric vehicles (HEV) is urgent. As a new energy industry, lithium-ion batteries have been widely used in various portable electronic products...

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): H01M4/36H01M4/58H01M10/0525B82Y30/00
CPCB82Y30/00H01M4/362H01M4/582H01M10/0525Y02E60/10
Inventor 黄思李军许帅军李雪峰李少芳潘春阳
Owner GUANGDONG UNIV OF TECH
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