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Divalent metal ion pre-intercalation layered vanadium oxide nanomaterial and its preparation method and application

A technology of divalent metal ions and vanadium oxides, which is applied in the fields of nanomaterials and electrochemistry, and can solve problems such as unreported research work on preparation methods.

Active Publication Date: 2021-04-20
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Divalent metal ions pre-intercalated layered vanadium oxide nanomaterials, which are used as a new positive electrode active material for aqueous zinc-ion batteries, and its preparation methods and related research work have not yet been reported.

Method used

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  • Divalent metal ion pre-intercalation layered vanadium oxide nanomaterial and its preparation method and application
  • Divalent metal ion pre-intercalation layered vanadium oxide nanomaterial and its preparation method and application
  • Divalent metal ion pre-intercalation layered vanadium oxide nanomaterial and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Mg x V 2 o 5-y The preparation method of nanoribbon material, it comprises the steps:

[0031] 1) Weigh 4 parts of 0.364g V respectively 2 o 5 Add it to 30ml of deionized water, and add 5ml of 30% H 2 o 2 solution, magnetically stirred for half an hour to obtain an orange-red clear solution;

[0032] 2) Weigh 50mmol, 100mmol, 150mmol, and 200mmol MgCl 2 .6H 2 O, while magnetically stirring, add to the orange-red clear solution in step 1) respectively, will be accompanied by a violent exothermic reaction, a large amount of orange-red flocculent precipitates will be produced, and continue to stir for 2 to 4 hours;

[0033] 3) Transfer the suspension containing flocculent precipitate obtained in step 2) to a 50ml reaction kettle, and heat it at 200° C. for 4 days. Then take it out and cool it down to room temperature naturally to obtain dark green, yellow, orange red and red products respectively;

[0034] 4) Pour the product of step 3) into a beaker, mash it, ad...

Embodiment 2

[0040] Ca x V 2 o 5-y A preparation method for a nanowire material, comprising the steps of:

[0041] 1) Weigh 0.364g V 2 o 5 Add it to 30ml of deionized water, and add 5ml of 30% H 2 o 2 solution, magnetically stirred for half an hour to obtain an orange-red clear solution;

[0042] 2) Weigh 100mmol CaCl 2 , and adding it into the orange-red clear solution in step 1) while magnetically stirring, will be accompanied by a violent exothermic reaction, and a large amount of orange-red flocculent precipitates will be produced. Stirring was continued for 2-4 hours.

[0043] 3) Transfer the suspension containing flocculent precipitate obtained in step 2) to a 50ml reaction kettle, and heat it at 200° C. for 4 days. Then take out and cool to room temperature naturally to obtain orange-red product;

[0044] 4) Pour the product of step 3) into a beaker, mash it, add 30-50ml of deionized water, and stir it magnetically to form a uniform suspension;

[0045] 5) The suspension ...

Embodiment 3

[0048] Sr x V 2 o 5-y The preparation method of nanowire, it comprises the steps:

[0049] 1) Weigh 0.364g V 2 o 5 Add it to 30ml of deionized water, and add 5ml of 30% H 2 o 2 solution, magnetically stirred for half an hour to obtain an orange-red clear solution;

[0050] 2) Weigh 100mmol SrCO 3 Add it into the orange-red clear solution in step 1) while magnetically stirring, and the solution will turn into light brown with a violent exothermic reaction. Continue to stir for 2 to 4 hours to obtain a brown clear solution.

[0051] 3) Transfer the suspension containing flocculent precipitate obtained in step 2) to a 50ml reaction kettle, and heat it at 200° C. for 4 days. Then take out and naturally cool to room temperature to obtain a dark green product;

[0052] 4) Pour the product of step 3) into a beaker, mash it, add 30-50ml of deionized water, and stir it magnetically to form a uniform suspension;

[0053] 5) The suspension obtained in step 4) is subjected to ce...

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Abstract

The invention relates to a divalent metal ion pre-embedded layered vanadium oxide nanomaterial and a preparation method thereof, and its chemical formula is A x V 2 o 5‑y , where A is Mg, Ca, Sr or Zn, where Mg x V 2 o 5‑y The diameter of the nanobelt is 100-1500nm, the length is 5-50μm or Ca x V 2 o 5‑y The diameter of the nanowire is 100-1000nm, the length is 5-50μm or Sr x V 2 o 5‑y The nanowire diameter is 100-1000nm, the length is 5-50μm or Zn x V 2 o 5‑y The nanowire diameter is 100-300nm, the length is 5-50μm or Zn x V 2 o 5‑y The diameter of the nanoflowers is 3-5 μm. The invention exhibits high specific capacity, good cycle stability and excellent rate performance, and is a potential high-performance commercial positive electrode material for zinc-ion batteries.

Description

technical field [0001] The invention belongs to the technical field of nanomaterials and electrochemistry, and in particular relates to a divalent metal ion pre-embedded layered vanadium oxide nanomaterial and a preparation method thereof. The nanowire can be used as a positive electrode active material of a zinc ion battery. Background technique [0002] Energy and the environment are two major issues that must be addressed for human survival and social development today. With the depletion of fossil resources such as coal and petroleum and the deteriorating environment, the development of renewable energy such as solar energy, wind energy, and water energy has become a global trend. As a high-efficiency electrochemical energy storage device, batteries have been widely used in electric vehicles, mobile phones and mobile communications. However, primary batteries cause waste of resources, and traditional lead-acid batteries can easily lead to serious regional lead pollution....

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/36H01M4/48H01M10/36B82Y30/00
CPCB82Y30/00H01M4/366H01M4/48H01M10/36Y02E60/10
Inventor 麦立强陈丽能徐小明张国彬
Owner WUHAN UNIV OF TECH
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