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A preparation method of ultra-large lamellar rgo loaded ultrafine β-feooh nanoparticles lithium-ion battery anode material

A lithium-ion battery and nanoparticle technology, applied in the field of electrochemistry, can solve the problems of the specific capacity to be further improved and the poor conductivity.

Active Publication Date: 2021-06-15
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Zhang Meng et al. (Journal of Alloys and Compounds, 2015, 648, 134-138) used ferric chloride and urea as reactants to react under hydrothermal conditions at 80°C for 4 hours to obtain FeOOH. The conductivity of the material is poor, and the specific capacity needs to be further improved; Zhai Yanjun et al. (Journal of PowerSources, 2016, 327, 423-431) used ferric chloride and cerium nitrate as raw materials, PVP, etc. as surfactants, doped Ce on FeOOH, but its -1 The reversible capacity at current density is only 830mAh g -1 , battery performance needs to be further improved

Method used

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  • A preparation method of ultra-large lamellar rgo loaded ultrafine β-feooh nanoparticles lithium-ion battery anode material
  • A preparation method of ultra-large lamellar rgo loaded ultrafine β-feooh nanoparticles lithium-ion battery anode material
  • A preparation method of ultra-large lamellar rgo loaded ultrafine β-feooh nanoparticles lithium-ion battery anode material

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Experimental program
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Effect test

Embodiment 1

[0030] 1) Dispersion of the commercially available oxide oxide in 25 ml of deionized water, then dispersed 1H with 300 W ultrasonic generator, forming a dispersion uniform oxide-suspension A;

[0031] 2) The analytical pure soluble iron-containing hexahydrofluchloride, sodium chloride and 0.3 g of urea were added to 25 ml of anhydrous ethanol and 10 ml of deionized water, and the salt was dissolved, then the salt was dissolved, then added to the suspension A, The mixed solution of salt and oxide oxide is configured, wherein the concentration of the iron salt is 0.05 mol / L, the sodium salt concentration is 2 / 3 of the iron salt concentration, and then the mixed solution is dispersed with an ultrasonic generator to dispense the suspension B;

[0032] 3) Pour the suspension B prepared in the above-mentioned hydrothermal reaction kettle polytetrafluoroethylene liner, the filling degree is 30%, then seal the reactor, then put it in a homogeneous hydrothermal reactor 50 ° C for water p...

Embodiment 2

[0039] 1) Disperse commercially available graphene in 30 ml of deionized water, then dispersed 3H with 300 W ultrasonic generator to form a dispersion uniform oxide inkylene suspension A;

[0040] 2) Pure soluble iron salt seven hydrazine sulfate, sodium chloride and 0.35 g of urea were added to 25 ml of anhydrous ethanol and 12 ml of deionized water, thoroughly stirred to dissolve the salt, then added to suspension A, configure The mixed solution of salt and oxide oxide, wherein the concentration of the iron salt is 0.2 mol / L, the sodium salt concentration is 2 / 3 of the iron salt concentration, and then the mixed solution is dispersed with an ultrasonic generator to dispense the suspension B;

[0041] 3) Pour the suspension B prepared in the above-mentioned hydrothermal reaction kettle polytetrafluoroethylene liner, the filling degree is 80%, then seal the reaction kettle, and then put it in a homogeneous hydrothermal reactor The water heat reaction is carried out at 70 ° C for...

Embodiment 3

[0045] 1) Dispersion of commercially available oxide in graphene in 35 ml of deionized water, then dispersed by 300 W ultrasonic generator to form a dispersion uniform oxide inkylene suspension A;

[0046] 2) Pure soluble iron salt nine hydrogen nitrate iron, sodium chloride and 0.4 g of urea were added to 25 ml of anhydrous ethanol and 14 ml of deionized water, and thoroughly stirred the salt to dissolve, then added to suspension A, configured The mixed solution of salt and graphene, wherein the concentration of the iron salt is 0.3 mol / L, the sodium salt concentration is 2 / 3 of the iron salt concentration, and then the mixed solution is dispersed with an ultrasonic generator to disperses suspension B;

[0047] 3) Pour the suspension B prepared to pour the phase water-heat reactor, the filling degree of 60%, then seal the reaction kettle, then placed in a homogeneous hydrothermal reactor Gas-hot reaction is carried out at 150 ° C for 3 h, and after the end of the reaction, it i...

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Abstract

A method for preparing ultra-large sheet RGO loaded ultrafine β-FeOOH nanoparticles lithium-ion battery negative electrode material, dispersing graphene oxide in deionized water to obtain suspension A; adding a certain amount of soluble salt, sodium chloride and urea Add absolute ethanol and deionized water, and then mix with suspension A to obtain suspension B; pour suspension B into a homogeneous hydrothermal reaction kettle, then seal the reaction kettle, and put it into a homogeneous hydrothermal reaction kettle. After the hydrothermal reaction in the reactor, naturally cool to room temperature to obtain product C; wash product C with water and alcohol respectively, and disperse the washed product in water to obtain product D; freeze-dry product D to obtain RGO large sheet-loaded ultrafine β ‑FeOOH nanoparticle lithium-ion battery negative electrode material, the present invention uses composite graphene, particle size reduction method to improve the performance of β‑FeOOH, can provide more electrochemical active sites and ion transport channels, thereby improving the reversible capacity of the battery . 5000mA g ‑1 The lower reversible capacity exceeds 1000mAh g ‑1 , is a very potential lithium battery negative electrode material.

Description

Technical field [0001] The present invention relates to the field of electrochemical techniques, and more particularly to a method for preparing a negative electrode material of a super-large layer RGO load ultrafine β-FeOOH nanoparticle lithium ion battery. Background technique [0002] Lithium-ion battery negative electrode material is an important part of a lithium ion battery, and the composition of the negative electrode material and the structure of electrochemical properties of lithium ion batteries have decisive effects. Most of the transition metal complexes have a high theoretical specific capacity, and the discharge potential platform is between 1.0 to 2.0V; as a lithium ion battery negative electrode material, the reaction mechanism of the transition metal complex is different from the embedd lithium reaction or SN of the graphite material or SN The alloying reaction of the Si material, but a reversible redox reaction. [0003] Due to the natural abundance and non-tox...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/36H01M4/525H01M4/62H01M10/0525B82Y30/00
CPCB82Y30/00H01M4/366H01M4/525H01M4/625H01M10/0525Y02E60/10
Inventor 曹丽云马萌齐慧李嘉胤黄剑锋姚恺陈文卓吴桂娟
Owner SHAANXI UNIV OF SCI & TECH
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