Preparation method and application of vanadium selenide-nitrogen/sulfur co-doped carbon compound potassium ion battery negative electrode material with high performance

A carbon composite, battery negative electrode technology, applied in the direction of active material electrode, battery electrode, secondary battery manufacturing, etc., can solve the problems of low conductivity and large volume change, improve potassium storage performance, wide source, improve electronic The effect of conductivity

Active Publication Date: 2019-08-23
FUJIAN NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Vanadium selenide has a special layered structure and a relatively high theoretical capacity for storing potassium, but its conductivity is low and the volume change during charging and discharging is large.

Method used

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  • Preparation method and application of vanadium selenide-nitrogen/sulfur co-doped carbon compound potassium ion battery negative electrode material with high performance
  • Preparation method and application of vanadium selenide-nitrogen/sulfur co-doped carbon compound potassium ion battery negative electrode material with high performance
  • Preparation method and application of vanadium selenide-nitrogen/sulfur co-doped carbon compound potassium ion battery negative electrode material with high performance

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] 1) First wash the waste cow hair with deionized water, and then wash it at 65 o Dry under the temperature of C, then it is crushed into ox hair powder; And the ox hair powder is placed in 60 o C water bath in zinc chloride aqueous solution for 12 hours, suction filtration, and then at 70 o Dry at C temperature; finally the powder is added to the container of the ionic liquid with the molar ratio of ethylene glycol and choline chloride being 1:0.5, in a microwave oven at 120 o Reaction at C for 1 hour, centrifuged and dried to obtain keratin-containing dry matter;

[0027] 2) Weigh a certain mass of keratin (200 mg) and vanadyl acetylacetonate (500 mg) into deionized water (40 mL), ultrasonicate for a certain period of time (10 minutes), then stir for 10 minutes, and finally o Dry in C drying oven, collect gray-green solid sample;

[0028] 3) Grind the gray-green solid obtained in step 2) into powder, then weigh the solid powder and selenium powder with a mass ratio o...

Embodiment 2

[0032] 1) First wash the waste cow hair with deionized water, and then wash it at 70 o Dry under the temperature of C, then it is crushed into ox hair powder; And the ox hair powder is placed in 70 o C water bath in zinc chloride aqueous solution for 12 hours, suction filtration, and then in 80 o Dry at C temperature; Finally, the powder is added to the container of the ionic liquid with a molar ratio of ethylene glycol and choline chloride of 1:0.3, in a microwave oven at 150 o C for 0.5 hours, centrifuged and dried to obtain dry matter containing keratin;

[0033] 2) Weigh a certain mass of keratin (0.5 g) and vanadyl sulfate (5 g) into deionized water (200 mL), first sonicate for a certain period of time (15 minutes), then stir for 10 minutes, and finally at 70 o Dry in C drying oven, collect gray-green solid sample;

[0034] 3) Grind the gray-green solid obtained in step 2) into powder, then weigh the solid powder and selenium powder with a mass ratio of 1:3 and put the...

Embodiment 3

[0037] 1) First wash the waste cow hair with deionized water, and then wash it at 65 o Dry at a temperature of C, then crush it into powder; and place the cow hair powder at 60 o C water bath in zinc chloride aqueous solution for 12 hours, suction filtration, and then at 70 o Dry at C temperature; Finally, the powder is added to the container of the ionic liquid that the molar ratio of ethylene glycol and choline chloride is 1:1, and is heated in a microwave oven at 80 o C for 2 hours, centrifuged and dried to obtain dry matter containing keratin;

[0038] 2) Weigh a certain mass of keratin (1.25 g) and vanadyl acetylacetonate (2.5 g) into deionized water (150 mL), first sonicate for a certain period of time (12 minutes), then stir for 10 minutes, and finally at 70 o Dry in C drying oven, collect gray-green solid sample;

[0039] 3) Grind the gray-green solid obtained in step 2) into powder, then weigh the solid powder and selenium powder with a mass ratio of 1:2 and put th...

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Abstract

The invention discloses the preparation method and the application of a vanadium selenide-nitrogen / sulfur co-doped carbon compound potassium ion battery negative electrode material with high performance. In the above material, the vanadium selenide-nitrogen / sulfur co-doped carbon compound has a hierarchical microsphere structure. The keratin powder is a waste high-value utilization product, whichhas rich N atoms and S atoms. The keratin powder can effectively improve the potassium storage performance of the material after being doped into the material. According to the technical scheme, the method comprises the following steps: firstly, adding a vanadium source and keratin into deionized water, and performing ultrasonic treatment, stirring and drying in sequence; then introducing H2 / Ar tocalcine and selenize to prepare vanadium selenide- The invention discloses a nitrogen / sulfur co-doped carbon compound. The result shows that the negative electrode material of the potassium ion battery has a good potassium storage characteristic. The method is simple in preparation process, high in operability, wide in raw material source, environmentally friendly, low in cost, capable of achieving large-scale production and capable of meeting the environment requirement.

Description

technical field [0001] The invention belongs to the field of potassium ion battery materials, and in particular relates to a preparation method and application of a vanadium selenide-nitrogen / sulfur co-doped carbon compound with high performance. Background technique [0002] In the secondary energy storage system, lithium-ion batteries have received widespread attention and developed rapidly, and can be seen everywhere in our lives (portable electronic products, communication equipment, electric vehicles, etc.). However, considering the limited resources of metallic lithium, the consumption of a large amount of lithium has made lithium resources increasingly scarce, and relying solely on lithium-ion batteries can no longer meet human needs for the future. Potassium, which has similar physical and chemical properties to lithium, has more abundant reserves, lower price, and similar energy storage mechanism to lithium-ion batteries. Therefore, potassium-ion batteries are most ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/36H01M4/58H01M4/62H01M10/054H01M10/04
CPCH01M4/364H01M4/366H01M4/625H01M4/628H01M4/5815H01M10/054H01M10/0427H01M2004/027Y02E60/10Y02P70/50
Inventor 曾令兴何晓彤方益兴陈庆华钱庆荣许丽洪黄宝铨肖荔人罗永晋
Owner FUJIAN NORMAL UNIV
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