Preparation method of Ag2CrO4@Ag modified carbon fluoride positive electrode material

A positive electrode material, carbon fluoride technology, applied in the direction of positive electrode, battery electrode, active material electrode, etc., can solve the problem of insignificant improvement effect.

Active Publication Date: 2021-09-07
GUIZHOU MEILING POWER SUPPLY CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although this patent improves the voltage hysteresis of carbon fluoride batteries, the prepared batteries at room temperature and 1.0C rate only increase the initial discharge voltage of fluorinated carbon materials from 1.7V to 2.0V, and -10°C and 0.1C rate only increase the The initial discharge voltage of the carbonized carbon material is increased from 1.81V to 2.06V, and the improvement effect is not obvious

Method used

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  • Preparation method of Ag2CrO4@Ag modified carbon fluoride positive electrode material
  • Preparation method of Ag2CrO4@Ag modified carbon fluoride positive electrode material
  • Preparation method of Ag2CrO4@Ag modified carbon fluoride positive electrode material

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Effect test

Embodiment 1

[0044] a kind of Ag 2 CrO 4 The preparation method of the carbon fluoride cathode material modified by @Ag comprises the following steps:

[0045] (1) Preparation of potassium chromate solution: K 2 CrO 4 Disperse in deionized water, stir for 0.6h until uniform, and prepare a potassium chromate solution with a mass concentration of 16.6%;

[0046] (2) Preparation of fluorinated carbon dispersion: according to the mass ratio of fluorinated carbon: absolute ethanol: ultrapure water: polyvinylpyrrolidone = 1:1:1:1, first mix the absolute ethanol and ultrapure water evenly Finally, add carbon fluoride, and slowly add polyvinylpyrrolidone at the same time, stir for 1 hour until uniform, and obtain a carbon fluoride dispersion;

[0047] (3) Prepare the mixed solution: stir the potassium chromate solution and the carbon fluoride dispersion for 0.6h until uniform, and prepare the mixed solution;

[0048] (4) Prepare silver nitrate solution: disperse silver nitrate in deionized wa...

Embodiment 2

[0053] a kind of Ag 2 CrO 4 The preparation method of the carbon fluoride cathode material modified by @Ag comprises the following steps:

[0054] (1) Preparation of potassium chromate solution: K 2 CrO 4 Disperse in deionized water, stir for 0.7h until uniform, and prepare a potassium chromate solution with a mass concentration of 25%;

[0055] (2) Preparation of carbon fluoride dispersion: according to the mass ratio of carbon fluoride: absolute ethanol: ultrapure water: polyvinyl pyrrolidone = 1:1.5:1.5: 1.5, first mix the absolute ethanol and ultrapure water evenly Finally, add carbon fluoride, and at the same time slowly add polyvinylpyrrolidone, stir for 1.1h until uniform, and obtain a carbon fluoride dispersion;

[0056] (3) Prepare the mixed solution: stir the potassium chromate solution and the carbon fluoride dispersion for 0.7h until uniform, and prepare the mixed solution;

[0057] (4) Preparation of silver nitrate solution: disperse silver nitrate in deioniz...

Embodiment 3

[0063] a kind of Ag 2 CrO 4 The preparation method of the carbon fluoride cathode material modified by @Ag comprises the following steps:

[0064] (1) Preparation of potassium chromate solution: K 2 CrO 4 Disperse in deionized water, stir for 0.8h until uniform, and prepare a potassium chromate solution with a mass concentration of 20%;

[0065] (2) Preparation of fluorinated carbon dispersion: according to the mass ratio of fluorinated carbon: absolute ethanol: ultrapure water: polyvinyl pyrrolidone = 1:1.1:1.2:1, first mix the absolute ethanol and ultrapure water evenly Finally, add carbon fluoride, and slowly add polyvinylpyrrolidone at the same time, stir for 1.2 hours until uniform, and obtain a carbon fluoride dispersion;

[0066] (3) Prepare the mixed solution: stir the potassium chromate solution and the carbon fluoride dispersion for 0.8h until uniform, and prepare the mixed solution;

[0067] (4) Prepare silver nitrate solution: disperse silver nitrate in deioni...

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Abstract

The invention relates to the technical field of carbon fluoride positive electrode material modification, in particular to a preparation method of an Ag2CrO4@Ag modified carbon fluoride positive electrode material, which comprises the following steps of: (1) preparing a potassium chromate solution; (2) preparing a carbon fluoride dispersion liquid; (3) preparing a mixed solution: well stirring the potassium chromate solution and the carbon fluoride dispersion liquid to obtain the mixed solution; (4) preparing a silver nitrate solution; (5) preparing mixed slurry: slowly adding the silver nitrate solution into the mixed solution, continuing reaction after the silver nitrate solution is completely added to obtain a mixed reaction solution, and performing high-energy ball milling to obtain the mixed slurry; (6) drying and sieving the mixed slurry to obtain mixed powder; and (7) calcining: calcining the mixed powder. The problem of voltage lag at the initial discharge stage of the carbon fluoride battery is effectively solved, the rate capability and platform voltage are improved, the temperature rise in the discharge process of the lithium carbon fluoride battery is reduced, and the preparation method is simple and low in cost.

Description

technical field [0001] The invention relates to the technical field of carbon fluoride cathode material modification, in particular to an Ag 2 CrO 4 Preparation method of @Ag modified carbon fluoride cathode material. Background technique [0002] Lithium primary battery (primarylithium battery) is a high-energy chemical primary battery, commonly known as lithium battery, with metallic lithium as the negative electrode, solid salts or salts dissolved in organic solvents as the electrolyte, and metal oxides or other solid or liquid oxidants as the positive electrode. active substance. At present, the more mature systems mainly include lithium-manganese dioxide battery, lithium-thionyl chloride battery, lithium-sulfur dioxide battery and so on. In recent years, lithium-carbon fluoride batteries have attracted much attention due to their higher energy density. However, since fluorinated carbon is a compound formed by the reaction of various forms of carbon and fluorine gas,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/62H01M4/583H01M6/14
CPCH01M4/628H01M4/624H01M4/626H01M4/5835H01M6/14H01M2004/028Y02E60/10
Inventor 张红梅肖鹏王京亮姚德明甘潦王庆杰石斌王毅
Owner GUIZHOU MEILING POWER SUPPLY CO LTD
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