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Preparation method of Ag@C-modified fluorinated carbon electrode material

An electrode material, carbon fluoride technology, applied in battery electrodes, circuits, electrical components, etc., can solve problems such as unsatisfactory results, achieve significant effects, improve discharge performance, and improve voltage hysteresis.

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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the good stability and conductivity of conductive polymers, scholars at home and abroad have used conductive polypyrrole, polyaniline and polythiophene to modify carbon fluoride materials, but the results are not satisfactory.

Method used

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  • Preparation method of Ag@C-modified fluorinated carbon electrode material
  • Preparation method of Ag@C-modified fluorinated carbon electrode material
  • Preparation method of Ag@C-modified fluorinated carbon electrode material

Examples

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Embodiment 1

[0044] A preparation method of Ag@C modified carbon fluoride electrode material, the method is chemical reduction, comprising the following steps:

[0045] Step a, add the Ag compound and the solvent into the reactor according to the mass ratio=0.5:500, control the stirring speed of the reactor to 300r / min, and the stirring time is 30min; the solvent is composed of absolute ethanol and water according to the mass ratio=2.5 : 1 mix uniformly and make; Described Ag compound is silver nitrate;

[0046] Step b, adding carbon fluoride to the above-mentioned reactor, controlling the stirring speed of the reactor to 650r / min, and the stirring time is 1.6h to obtain a uniformly mixed mixed solution; the mass ratio of the carbon fluoride to the Ag compound=100 :0.5;

[0047] Step c, controlling the stirring speed of the reactor to 200r / min, adding NaOH or KOH aqueous solution with a mass fraction of 20% to the above mixed solution to obtain an alkaline solution with a pH value of 13; ...

Embodiment 2

[0058] A preparation method of Ag@C modified carbon fluoride electrode material, the method is chemical reduction, comprising the following steps:

[0059] Step a, Ag compound and solvent are added in the reactor according to mass ratio=5:500, and the stirring speed of control reactor is 400r / min, and stirring time is 40min; Described Ag compound is silver nitrate; Described solvent is made of anhydrous Ethanol and water are prepared by mixing uniformly according to the mass ratio = 3:1;

[0060] Step b, adding carbon fluoride to the above-mentioned reactor, the stirring speed of the control reactor is 800r / min, and the stirring time is 2h to obtain a uniform mixed solution; the mass ratio of the carbon fluoride and the Ag compound=100: 5;

[0061] Step c, controlling the stirring speed of the reactor to 300r / min, adding NaOH or KOH aqueous solution with a mass fraction of 25% to the above mixed solution to obtain an alkaline solution with a pH value of 14;

[0062] Step d, ...

Embodiment 3

[0071] A preparation method of Ag@C modified carbon fluoride electrode material, the method is chemical reduction, comprising the following steps:

[0072] Step a, Ag compound and solvent are added in the reactor according to mass ratio=1:500, and the stirring speed of control reactor is 200r / min, and stirring time is 20min; Described Ag compound is silver nitrate; Described solvent is made of anhydrous Ethanol and water are prepared by mixing uniformly according to the mass ratio = 2:1;

[0073] Step b, adding carbon fluoride to the above-mentioned reactor, controlling the stirring speed of the reactor to be 500r / min, and the stirring time is 1h to obtain a uniform mixed solution; the mass ratio of the carbon fluoride to the Ag compound=100: 4.5;

[0074] Step c, controlling the stirring speed of the reactor to 100r / min, adding NaOH or KOH aqueous solution with a mass fraction of 15% to the above mixed solution to obtain an alkaline solution with a pH value of 12;

[0075] ...

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Abstract

The invention discloses a preparation method of an Ag@C-modified fluorinated carbon electrode material. The method comprises the following steps of: mixing an Ag compound and a solvent, adding carbonfluoride, 15-25 parts of NaOH or KOH aqueous solution, parts by mass fraction, adding reducing agent for action after temperature rise, performing filtering, washing, drying and grinding, and performing 100-200mesh screening to prepare an Ag@C-modified fluorinated carbon electrode material. Part of fluorinated carbon material is restored to C while restoring the Ag compound to Ag by employing thechemical reduction method. The Ag@C is employed to perform modification of the fluorinated carbon material, and the surface of the fluorinated carbon material is uniformly coated with the Ag@C to increase the conductivity of the fluorinated carbon material, effectively improve the problems of the voltage hysteresis and low-temperature performance of the fluorinated carbon material and improve therate performance of the lithium fluorocarbon battery.

Description

technical field [0001] The invention belongs to the technical field of lithium primary battery production and processing, and in particular relates to a preparation method of an Ag@C modified carbon fluoride electrode material. Background technique [0002] Lithium primary battery (primarylithium battery), is a high-energy chemical primary battery, commonly known as lithium battery. Metal lithium is used as the negative electrode, solid salts or salts dissolved in organic solvents are used as the electrolyte, and metal oxides or other solid and liquid oxidants are used as the positive active material. General-purpose round lithium manganese dioxide (Li / MnO 2 ) battery and lithium fluoride carbon [Li / (CFx)n] battery are represented by the letters CR and BR respectively, and the subsequent numbers represent the model of the battery. Lithium primary battery is a general term for this type of chemical power supply series using metallic lithium as the negative electrode materia...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/36H01M4/583H01M4/62H01M6/14
CPCH01M4/366H01M4/5835H01M4/625H01M4/626H01M6/14
Inventor 张红梅王振陈铤王建勇陈晓涛王庆杰王华国
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