an ag 2 cro 4 Preparation of @ag-modified carbon fluoride cathode materials

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, and achieve the effect of improving the voltage hysteresis problem, improving the voltage platform, and the effect is remarkable

Active Publication Date: 2022-08-09
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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  • an ag <sub>2</sub> cro <sub>4</sub> Preparation of @ag-modified carbon fluoride cathode materials
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  • an ag <sub>2</sub> cro <sub>4</sub> Preparation of @ag-modified carbon fluoride cathode materials

Examples

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Effect test

Embodiment 1

[0044] AG 2 CRO 4 @AG modified method of preparing carbon -based pole material, including the following steps:

[0045] (1) Preparation of potassium chromate solution: K K 2 CRO 4 Scattered in the ionic water, stir 0.6h to uniform, and make potassium chromate solution with a mass concentration of 16.6 %;

[0046] (2) Preparation of carbonized decentralized liquid: According to fluoride: Water -free ethanol: ultra -pure water: polyethylene pyrirol = 1: 1: 1: 1 quality ratio, first uniform mixing of water -free ethanol and ultra -pure water uniformly Later, add carbonfluoride, slowly add polyethylene pyrirol, stir 1h to uniformly, and make fluoride decentralized liquid;

[0047] (3) Preparation of hybrid solution: Stir the potassium chromate solution and fluoride decentralized solution 0.6h to uniform to make the mixture;

[0048] (4) Preparation of silver solution: scattered silver nitrate in exfoliating water, stir 0.6h to uniform, and make silver solution with a mass concentratio...

Embodiment 2

[0053] AG 2 CRO 4 @AG modified method of preparing carbon -based pole material, including the following steps:

[0054] (1) Preparation of potassium chromate solution: K K 2 CRO 4 Scattered in the ion water, stir 0.7h to uniform, and make potassium chromate solution with a mass concentration of 25 %;

[0055] (2) Preparation of carbonized decentralized liquid: According to the quality ratio of fluoride: water -free ethanol: ultra -pure water: polyethylene pyrirol = 1: 1.5: 1.5: 1.5, first mix the water -free ethanol and ultra -pure water uniformly Later, add carbon fluoride, and slowly add polyethylene pyrirol, stir 1.1h to uniform, and make carbonized dispersal liquid;

[0056] (3) Preparation of hybrid solution: Stir the potassium chromate solution and fluoride decentralized solution by 0.7h to uniform to make the mixture;

[0057] (4) Preparation of silver solution: scattered silver nitrate in exfoliating water, stir 0.7h to uniform, and make silver solution with a mass concent...

Embodiment 3

[0063] AG 2 CRO 4 @AG modified method of preparing carbon -based pole material, including the following steps:

[0064] (1) Preparation of potassium chromate solution: K K 2 CRO 4 Scattered in the ion water, stir 0.8h to uniform, and make potassium chromate solution with a mass concentration of 20 %;

[0065] (2) Preparation of carbonized decentralized liquid: According to fluoride: Water -free ethanol: ultra -pure water: polyethylene pyrirol = 1: 1.1: 1.2: 1 quality ratio, first uniform mixing of water -free ethanol and ultra -pure water uniformly Later, add carbon fluoride, and slowly add polyethylene pyrirol, stir 1.2h to uniform, and make carbonized dispersal liquid;

[0066] (3) Preparation of hybrid solution: Stir the potassium chromate solution and fluoride decentralized solution 0.8h to uniform to make the mixture;

[0067] (4) Preparation of silver nitrate solution: scattered silver nitrate in de -ion water, stir 0.8h to uniform, and make silver solution with a mass conce...

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Abstract

The invention relates to the technical field of modification of carbon fluoride positive electrode materials, in particular to a kind of Ag 2 CrO 4 The preparation method of the @Ag-modified fluorocarbon cathode material includes the following steps: (1) preparing a potassium chromate solution; (2) preparing a fluorocarbon dispersion; (3) preparing a mixed solution: mixing the potassium chromate solution and fluorine The carbonized dispersion liquid is stirred evenly to obtain a mixed solution; (4) a silver nitrate solution is prepared; (5) a mixed slurry is prepared: the silver nitrate solution is slowly added to the mixed solution, and after the addition is completed, the reaction is continued to obtain a mixed reaction (6) Drying and sieving the mixed slurry to obtain a mixed powder; (7) Calcination: calcining the mixed powder to obtain a mixed slurry; the present invention effectively improves the carbon fluoride battery The problem of voltage hysteresis at the initial stage of discharge improves the rate performance, the plateau voltage, and reduces the temperature rise during the discharge process of the lithium carbon fluoride battery, and the preparation method is simple and low in cost.

Description

Technical field [0001] The present invention involves the technology field of fluoride carbon orthopedic material modification, especially an AG 2 CRO 4 @AG modified method of preparing carbon -based pole material. Background technique [0002] Lithium battery (PrimarylithiUmbattery) is a high -energy chemical original battery, commonly known as lithium battery, with metal lithium as negative, solid salt or soluble solvents as electrolytes, metal oxides or other solids, liquid oxidants as positive poles as positive poles as positive poles. Active substance. At present, the relatively mature systems are lithium-manganese dioxide batteries, lithium-sulfonal chlorine batteries, lithium-sulfur dioxide batteries, etc. In recent years, lithium-fluoride batteries have attracted much attention due to higher energy density. However, since the carbon carbon is a compound formed by the carbon and fluoridic reactions of various forms, the conductivity of the carbonized carbon material is poo...

Claims

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Application Information

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Patent Type & Authority Patents(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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