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Liquid phase synthetic Zr<4+> doped bismuth fluoride lithium-ion battery positive electrode material and preparation method thereof

A lithium-ion battery, liquid phase synthesis technology, applied in battery electrodes, chemical instruments and methods, secondary batteries, etc., can solve problems such as unpredictable effects and complex parent action mechanism, and achieve low equipment requirements and excellent electrochemical performance. , to avoid the effect of side reaction products

Active Publication Date: 2015-09-09
嘉兴市燕知网络科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the mechanism of ion doping or even multi-ion synergistic doping on the matrix is ​​very complicated, and the effect is often unpredictable.

Method used

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  • Liquid phase synthetic Zr&lt;4+&gt; doped bismuth fluoride lithium-ion battery positive electrode material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015]Embodiment 1: Ammonium fluoride is dissolved in the water of 4 times of the quality of ammonium fluoride, the quality 42% normal hexane of water, the dodecyl dimethyl hydroxypropyl sulfonate of 5.5% of the quality of water are added in this solution Base betaine, the n-butanol of the quality 5.6% of water; Insert mechanical stirring paddle in this system, stir 17 minutes with the speed of 1600rpm, after this leave standstill this solution 10 minutes and claim this solution as solution I; Pentahydrate nitric acid The amount of bismuth, bismuth nitrate pentahydrate 1.5% zirconium oxynitrate dihydrate, nitric acid 0.5% bismuth nitrate pentahydrate mass and perfluoroheptanoic acid 0.6% bismuth nitrate pentahydrate mass are mixed and dissolved in the total mass of the above substances after mixing In 4 times of water, add 40% n-hexane of the quality of water, 5% sodium lauryl aminopropionate of water, and 5% n-amyl alcohol of the quality of water in this solution; insert a mec...

Embodiment 2

[0016] Embodiment 2: ammonium fluoride is dissolved in the water of 4.5 times of ammonium fluoride quality, add the quality 50% n-hexane of water, the dodecyl dimethyl sulfopropyl beet of the quality 7% of water in this solution The quality 7% n-amyl alcohol of alkali, water; Insert mechanical stirring paddle in this system, stir 20 minutes with the speed of 1800rpm, leave standstill this solution after this 15 minutes and claim this solution as solution I; Bismuth nitrate pentahydrate, The amount of bismuth nitrate pentahydrate substance is 1.5% zirconium nitrate pentahydrate, nitric acid with 5% mass of bismuth nitrate pentahydrate and perfluoroheptanoic acid with 0.6% mass of bismuth nitrate pentahydrate, mixed and dissolved in 4 times the total mass of the above substances In water, add the normal hexane of the quality 40% of water, the quality 5% sodium cocoyl glutamate of water, the n-butanol of the quality 5% of water in this solution; Insert mechanical stirring paddle i...

Embodiment 3

[0017] Embodiment 3: Ammonium fluoride is dissolved in the water of 5 times of the quality of ammonium fluoride, the quality 58% n-hexane of water, the tetradecyl amidopropyl hydroxypropyl sulfo group of 9% of the quality of water are added in this solution Betaine, the n-hexanol of the quality 9.5% of water; Insert mechanical stirring paddle in this system, stir 30 minutes with the speed of 2000rpm, leave standstill this solution after this 20 minutes and claim this solution as solution I; Bismuth chloride, chlorine Zirconium sulfate tetrahydrate tetrahydrate with 5% bismuth content, nitric acid with 3.5% bismuth chloride mass and 2,2-difluorocyclopropanecarboxylic acid with 5% bismuth chloride mass are mixed and dissolved in 5 times the total mass of the above substances In water, add the normal hexane of the quality 60% of water, the quality 9% sodium lauroyl glutamate of water, the n-hexanol of the quality 9% of water in this solution; Stir at high speed for 30 minutes, th...

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Abstract

The invention relates to a liquid phase synthetic Zr<4+> doped bismuth fluoride lithium-ion battery positive electrode material and a preparation method thereof. According to the method, reaction raw materials such as an ammonium fluoride solution and a bismuth salt solution are converted into tiny liquid droplets through the effect of a surfactant, and with the effect of a specific auxiliary agent and the centrifugal force field, the generated bismuth fluoride solid small particles are subjected to surface auxiliary agent covering and concurrently leave the reaction system, such that the possibility that the generated bismuth fluoride solid small particles continuously act with the ammonium fluoride to form a plurality of the double salts is substantially reduced; with the Zr<4+> doping, the overpotential of the material is reduced; and the bismuth fluoride material adopted as the lithium-ion battery positive electrode material has the specific capacity exceeding 200 mAh.g<-1>. According to the present invention, the method has characteristics of low equipment requirement and high product purity, the condition that a plurality of the double salts of the bismuth fluoride and other side reaction products are generated in the liquid phase reaction can be avoided, and the material has the excellent electrochemical property.

Description

technical field [0001] The invention relates to the technical field of a method for manufacturing a high-capacity 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 automobi...

Claims

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Application Information

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IPC IPC(8): C01G29/00H01M4/58H01M10/0525
CPCY02E60/10
Inventor 徐玲霞水淼徐晓萍陈超陈姝舒杰任元龙
Owner 嘉兴市燕知网络科技有限公司
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