Fe2O3/FeF3-2xOx/Fe<3+>,Ce<4+> doped zirconium fluoride layer structure positive electrode material of lithium battery and preparation method thereof

A technology of zirconium fluoride layer and cathode material, applied in battery electrodes, structural parts, circuits, etc., can solve problems such as failure, lattice mismatch, detachment of coating materials, etc., to improve volume change and improve comprehensive electrochemical performance , the effect of reducing the activation energy of ion migration

Inactive Publication Date: 2016-08-31
NINGBO UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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

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  • Fe2O3/FeF3-2xOx/Fe&lt;3+&gt;,Ce&lt;4+&gt; doped zirconium fluoride layer structure positive electrode material of lithium battery and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Embodiment 1: Zr(NO 3 ) 4 ·5H 2 O, Zr(NO 3 ) 4 ·5H 2 Ammonium fluoride, Zr(NO 3 ) 4 ·5H 2 The amount of O species 0.7%Ce(NH 4 ) 2 (NO 3 ) 6 , Zr(NO 3 ) 4 ·5H 2 The amount of O substance 0.7% ferric nitrate nonahydrate, Zr(NO 3 ) 4 ·5H 2 O quality 0.7% glycerin and ethylene glycol are put into ball mill after mixing the mixed liquid of 1: 1 with the volume ratio, the mass ratio of ball mill and material is 20: 1, with the speed ball mill of 200 rev / mins 10 hours, ball mill After the completion, 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+ , Ce 4+ Doped with zirconium fluoride; ferric nitrate nonahydrate and ammonium fluoride with a mass ratio of 1:3.0, Fe with a mass of 90 times the total mass of ferric nitrate nonahydrate and ammonium fluoride 3+ , Ce 4+ Tetra-n-butylammonium fluoride doped with 3% of the total mass of zirconium fluoride, ferric nitrate nonahydrate and amm...

Embodiment 2

[0016] Embodiment 2: Zr(NO 3 ) 4 ·5H 2 O, Zr(NO 3 ) 4 ·5H 2 Ammonium fluoride, Zr(NO 3 ) 4 ·5H 2 Amount of O species 3% Ce(NH 4 ) 2 (NO 3 ) 6 , Zr(NO 3 ) 4 ·5H 2 The amount of O substance 3% ferric nitrate nonahydrate, Zr(NO 3 ) 4 ·5H 2 0 quality 3% glycerin and ethylene glycol are put into ball mill after being mixed with the mixed liquid of 1: 1 with volume ratio, and the mass ratio of ball mill child and material is 20: 1, with the speed ball mill of 300 rev / mins 15 hours, ball mill After the completion, the material was taken out, washed with water three times, and dried in a drying oven at 110°C for 16 hours to obtain Fe 3+ , Ce 4+ Doped with zirconium fluoride; ferric nitrate nonahydrate and ammonium fluoride with a mass ratio of 1:3.3, Fe with a mass of 120 times the total mass of ferric nitrate nonahydrate and ammonium fluoride 3+ , Ce 4+ Tetra-n-butylammonium fluoride doped with 6% of the total mass of zirconium fluoride, ferric nitrate nonahydrate...

Embodiment 3

[0017] Embodiment 3: Zr(NO 3 ) 4 ·5H 2 O, Zr(NO 3 ) 4 ·5H 2 Ammonium fluoride, Zr(NO 3 ) 4 ·5H 2 The amount of O species 4.5% Ce(NH 4 ) 2 (NO 3 ) 6 , Zr(NO 3 ) 4 ·5H 2 The amount of O substance 4.5% ferric chloride hexahydrate, Zr(NO 3 ) 4 ·5H 2 Glycerol and ethylene glycol of 0 quality 4.5% are put into ball mill after being mixed with the mixed liquid of 1: 1 with volume ratio, and the mass ratio of ball mill child and material is 20: 1, with the speed ball mill of 400 rev / mins 20 hours, ball mill After the completion, the material was taken out, washed with water three times, and dried in a drying oven at 120°C for 20 hours to obtain Fe 3+ , Ce 4+ Doped with zirconium fluoride; ferric chloride hexahydrate and ammonium fluoride with a mass ratio of 1:3.6, and Fe with a mass of 170 times the total mass of ferric chloride hexahydrate and ammonium fluoride 3+ , Ce 4+ Tetramethylammonium fluoride doped with zirconium fluoride, ferric chloride hexahydrate and ...

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Abstract

The invention provides a Fe2O3 / FeF3-2xOx / Fe<3+>,Ce<4+> doped zirconium fluoride layer structure positive electrode material of a lithium battery and a preparation method thereof. According to the method, Fe<3+>,Ce<4+> doped zirconium 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+>,Ce<4+> doped zirconium fluoride particles so as to improve surface electron conduction capability of Fe<3+>,Ce<4+> doped zirconium fluoride and to resist harmful effect of an organic electrolyte on particle surfaces; and comprehensive electrochemical performance of zirconium fluoride is greatly improved through Fe<3+>,Ce<4+> doping.

Description

technical field [0001] The invention relates to the technical field of a method for manufacturing a high-performance zirconium 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 aut...

Claims

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Application Information

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Patent Type & Authority Applications(China)
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
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