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

Fe2O3/FeF3-2xOx/Fe<3+>,Co<2+> doped bismuth fluoride layer structure positive electrode material of lithium battery and preparation method thereof

A cathode material, bismuth fluoride technology, applied in battery electrodes, structural parts, circuits, etc., can solve problems such as lattice mismatch, coating material detachment, failure, etc., to improve electronic conductivity, improve volume change, and improve The effect of comprehensive electrochemical performance

Inactive Publication Date: 2016-08-31
NINGBO UNIV
View PDF1 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, after many cycles, the battery material fails due to the detachment of the cladding material from the matrix material due to the lattice mismatch between the cladding material and the matrix material and the volume change of the matrix material during cycling.

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
  • Fe2O3/FeF3-2xOx/Fe&lt;3+&gt;,Co&lt;2+&gt; doped bismuth fluoride layer structure positive electrode material of lithium battery and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Example 1: Ammonium fluoride, 0.6% cobalt nitrate hexahydrate, and 0.6% nonahydrate nitric acid of bismuth nitrate pentahydrate and 3.0 times the amount of bismuth nitrate pentahydrate substance Iron, bismuth nitrate pentahydrate mass 0.6%, glycerol and ethylene glycol mixed liquid with a volume ratio of 1:1 are mixed and put into a ball mill, the mass ratio of the ball mill to the material is 20:1, and ball milled at a speed of 200 rpm for 10 hours After ball milling, the material was taken out, washed with water three times, and dried in a drying oven at 100°C for 10 hours to obtain Fe 3+ ,Co 2+ Doped with bismuth fluoride; Fe nitrate nonahydrate and ammonium fluoride with a mass ratio of 1:3.0, Fe nitrate nonahydrate and ammonium fluoride with a mass of 80 times the total mass 3+ ,Co 2+ Tetra-n-butylammonium fluoride doped with 2% of the total mass of bismuth fluoride, iron nitrate nonahydrate and ammonium fluoride, with a mass of ferric nitrate nonahydrate, ammoni...

Embodiment 2

[0016] Embodiment 2: Ammonium fluoride, 2.5% cobalt nitrate hexahydrate, 2.5% nonahydrate nitric acid of bismuth nitrate pentahydrate, 3.3 times the amount of bismuth nitrate pentahydrate substance Iron, bismuth nitrate pentahydrate mass 2.5%, glycerol and ethylene glycol mixed liquid with a volume ratio of 1:1 are mixed and put into a ball mill, the mass ratio of the ball mill to the material is 20:1, and ball milled at a speed of 300 rpm for 15 hours After ball milling, the material was taken out, washed with water three times, and dried in a drying oven at 110°C for 15 hours to obtain Fe 3+ ,Co 2+ Doped with bismuth fluoride; Fe nitrate nonahydrate and ammonium fluoride with a mass ratio of 1:3.5, Fe nitrate nonahydrate and ammonium fluoride with a mass of 120 times the total mass 3+ ,Co 2+ Tetra-n-butylammonium fluoride doped with 6% of the total mass of bismuth fluoride, iron nitrate nonahydrate and ammonium fluoride, with a mass of ferric nitrate nonahydrate, ammonium ...

Embodiment 3

[0017] Embodiment 3: the ammonium fluoride of bismuth nitrate pentahydrate, the amount of bismuth nitrate pentahydrate substance 3.5 times, the amount of bismuth nitrate pentahydrate substance 4.5% cobalt oxalate tetrahydrate, the amount of bismuth nitrate pentahydrate substance 4.5% hexahydrate three Ferric chloride, bismuth nitrate pentahydrate mass 4.5%, glycerol and ethylene glycol mixed liquid with a volume ratio of 1:1 are mixed and put into a ball mill, the mass ratio of the ball mill to the material is 20:1, and ball milled at a speed of 400 rpm After 20 hours, the material was taken out after ball milling, washed with water three times, and dried in a drying oven at 120°C for 20 hours to obtain Fe 3+ ,Co 2+ Doped with bismuth fluoride; ferric chloride hexahydrate and ammonium fluoride with a mass ratio of 1:3.6, and Fe with a mass of 160 times the total mass of ferric chloride hexahydrate and ammonium fluoride 3+ ,Co 2+ Tetramethylammonium fluoride doped with 9% of ...

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 provides a Fe2O3 / FeF3-2xOx / Fe<3+>,Co<2+> doped bismuth fluoride layer structure positive electrode material of a lithium battery and a preparation method thereof. According to the method, Fe<3+>,Co<2+> doped bismuth fluoride is prepared through solid-phase synthesis; then on the basis of the characteristic that FeF3 is prone to gradual oxidation into Fe2O3 at a high temperature, FeF3-2xOx (wherein 0<x<0.3) and a Fe2O3 layer successively coat Fe<3+>,Co<2+> doped bismuth fluoride particles so as to improve surface electron conduction capability of Fe<3+>,Ce<4+> doped bismuth fluoride and to resist harmful effect of an organic electrolyte on particle surfaces; and comprehensive electrochemical performance of bismuth fluoride is greatly improved through Fe<3+>,Co<2+> doping.

Description

technical field [0001] The invention relates to the technical field of a method for manufacturing a high-performance bismuth fluoride composite lithium battery cathode material. Background technique [0002] Lithium-ion secondary batteries have the absolute advantages of high volume, weight-to-energy ratio, high voltage, low self-discharge rate, no memory effect, long cycle life, and high power density. Currently, the global mobile power market has an annual share of more than 30 billion US dollars and Gradually grow at a rate of more than 10%. Especially in recent years, with the gradual depletion of fossil energy, new energy sources such as solar energy, wind energy, and biomass energy have gradually become alternatives to traditional energy sources. Among them, wind energy and solar energy are intermittent, and a large amount of energy is used simultaneously to meet the needs of continuous power supply. Energy storage batteries; urban air quality problems caused by autom...

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): H01M4/36H01M4/58H01M4/62H01M10/0525
CPCH01M4/366H01M4/582H01M4/624H01M4/628H01M10/0525Y02E60/10
Inventor 方敏华水淼李月陈超李弯弯舒杰任元龙
Owner NINGBO 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