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Preparation method for vanadium oxide composite electrode material used for zinc ion battery

A zinc-ion battery and vanadium oxide technology, applied in the field of electrochemical materials, to achieve the effect of alleviating volume expansion, good cycle stability, and excellent rate performance

Inactive Publication Date: 2017-09-29
NANKAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there have been no reports on the application of vanadium oxide graphene composites in Zn-ion batteries.

Method used

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  • Preparation method for vanadium oxide composite electrode material used for zinc ion battery
  • Preparation method for vanadium oxide composite electrode material used for zinc ion battery
  • Preparation method for vanadium oxide composite electrode material used for zinc ion battery

Examples

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Embodiment 1

[0033] This embodiment provides a method for preparing a vanadium oxide composite electrode material for a zinc ion battery, comprising the following steps:

[0034] Step 1: Take the ammonium metavanadate solid and add it to distilled water, stir in a water bath at 50°C to obtain a light yellow clear and transparent solution with a concentration of ammonium metavanadate of about 0.03mol / L, then add 9mL of graphene oxide solution (graphene oxide Alkene solution concentration is 11mg / mL), and continue to stir, obtain the liquid that mixes homogeneously;

[0035] Step 2: Pour the mixed solution obtained in Step 1 into a small 50mL plastic beaker, put it flat, freeze it quickly in liquid nitrogen, and immediately put it into a freeze dryer for freeze-drying.

[0036] Step 3: Carry out high-temperature calcination in an argon atmosphere. The procedure is: raise the temperature to 500° C. at a rate of 1° C. / min, and calcine for 5 hours; then cool down naturally to obtain a vanadium ...

Embodiment 2

[0039] This embodiment provides a method for preparing a vanadium oxide composite electrode material for a zinc ion battery, comprising the following steps:

[0040] Step 1: Take the ammonium metavanadate solid and add it to distilled water, stir in a water bath at 50° C. to obtain a light yellow, clear and transparent solution with a concentration of ammonium metavanadate of about 0.025 mol / L, then add 3 mL of graphene oxide solution (graphene oxide Alkene solution concentration is 11mg / mL), and continue to stir, obtain the liquid that mixes homogeneously;

[0041] Step 2: Pour the mixed solution obtained in Step 1 into a small 50mL plastic beaker, put it flat, freeze it quickly in liquid nitrogen, and immediately put it into a freeze dryer for freeze-drying.

[0042] Step 3: Carry out high-temperature calcination in an argon atmosphere. The procedure is: raise the temperature to 500° C. at a rate of 1° C. / min, and calcine for 5 hours; then cool down naturally to obtain a vanad...

Embodiment 3

[0050] This embodiment provides a method for preparing a vanadium oxide composite electrode material for a zinc ion battery, comprising the following steps:

[0051] Step 1: Take the ammonium metavanadate solid and add it to distilled water, stir in a water bath at 50°C to obtain a light yellow clear and transparent solution with a concentration of ammonium metavanadate of about 0.024mol / L, then add 2.25mL of graphene oxide solution (oxidized Graphene solution concentration is 11mg / mL), and continue stirring, obtains the liquid that mixes homogeneously;

[0052] Step 2: Pour the mixed solution obtained in Step 1 into a small 50mL plastic beaker, put it flat, freeze it quickly in liquid nitrogen, and immediately put it into a freeze dryer for freeze-drying.

[0053] Step 3: Carry out high-temperature calcination in an argon atmosphere. The procedure is: raise the temperature to 250° C. at a rate of 1° C. / min, and calcine for 5 hours; then cool down naturally to obtain a vanadiu...

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Abstract

The invention provides a preparation method for a vanadium oxide composite electrode material used for a zinc ion battery. The preparation method for the vanadium oxide composite material comprises the following steps: dissolving ammonium metavanadate with water, then adding a carbon material, carrying out mixing under stirring and then carrying out drying; and subjecting a solid obtained after drying to high-temperature calcination under the protection of inert gas so as to obtain the vanadium oxide composite material. According to the invention, a variety of carbon materials can be used, and different vanadium oxide / carbon composites can be obtained by regulating calcining temperatures and time; and the vanadium oxide may have different structures and crystal forms, or may be a mixture of two or more vanadium oxides with different structures and crystal forms. When used as a positive electrode material for an aqueous zinc ion battery, the vanadium oxide composite material provided by the invention has the advantages of high specific capacity and energy density, excellent cycle stability, etc.; and a zinc ion battery based on the vanadium oxide / carbon composite positive electrode material has good application prospects in fields like green energy, portable electronic devices and communication technology.

Description

technical field [0001] The invention belongs to the technical field of electrochemical materials, and in particular relates to a preparation method of a vanadium oxide composite electrode material for a zinc ion battery. Background technique [0002] In view of the urgent concern about climate change, sustainable energy sources such as solar and wind power have entered the global focus, which has triggered the development and exploration of reliable low-cost electrochemical energy storage systems. Lithium-ion batteries are currently the most advanced secondary battery technology, featuring high energy density, long cycle life, and high operating voltage. In addition to being widely used in portable electronic devices, lithium-ion batteries are also used as the preferred power source for electric vehicles and energy storage power stations. However, with the continuous expansion of the application field and demand of lithium-ion batteries, the contradiction between the limited...

Claims

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Application Information

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IPC IPC(8): H01M4/36H01M4/48H01M4/04
CPCH01M4/0416H01M4/0471H01M4/362H01M4/48Y02E60/10
Inventor 牛志强戴熹万放陈军
Owner NANKAI UNIV
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