Graphene clad Fe2(MoO4)3 nanoparticle and preparation method and application thereof

A graphene-coated, nano-particle technology, applied in the field of Fe23 nano-particle preparation, achieves high specific capacity, high electronic conductivity, and is conducive to market promotion.

Inactive Publication Date: 2016-07-06
WUHAN UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the modification of iron molybdate has been studied, this graphene-coated Fe 2 (MoO 4 ) 3 Nanoparticles remain unreported

Method used

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  • Graphene clad Fe2(MoO4)3 nanoparticle and preparation method and application thereof
  • Graphene clad Fe2(MoO4)3 nanoparticle and preparation method and application thereof
  • Graphene clad Fe2(MoO4)3 nanoparticle and preparation method and application thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Graphene-coated Fe 2 (MoO 4 ) 3 A method for preparing nanoparticles, comprising the steps of:

[0030] 1) Mix 20 mL of cyclohexanol and 20 mL of cyclohexane, and add 0.4 g of sodium lauryl sulfate to obtain a mixed solution.

[0031] 2) Dissolve 0.56g of ferric nitrate in 15mL of deionized water to obtain solution A, dissolve 0.37g of ammonium heptamolybdate in 15mL of deionized water to obtain solution B, and add A and B solutions to the mixed solution obtained in step 1) in turn Stir in.

[0032] 3) The product obtained in step 2) is centrifugally filtered, the obtained precipitate is repeatedly washed with deionized water and alcohol, and dried at 70° C. to obtain the nanowire precursor.

[0033] 4) Put the precursor obtained in step 3) into a muffle furnace, heat it up to 500°C in the air and keep it warm for 2 hours, then cool naturally to room temperature to obtain Fe 2 (MoO 4 ) 3 nanoparticles;

[0034] 5) Take 0.15 g of the ferric molybdate particles pr...

Embodiment 2

[0040] Graphene-coated Fe 2 (MoO 4 ) 3 A method for preparing nanoparticles, comprising the steps of:

[0041] 1) Mix 25 mL of cyclohexanol and 25 mL of n-pentanol, and add 0.3 g of cetyltrimethylammonium bromide to obtain a mixed solution.

[0042] 2) Dissolve 0.56g ferric nitrate in 15mL deionized water to obtain solution A, dissolve 0.37g ferric molybdate in 15mL deionized water to obtain solution B, and add A and B solutions to the mixed solution obtained in step 1) in sequence Stir.

[0043] 3) The product obtained in step 2) is centrifugally filtered, the obtained precipitate is repeatedly washed with deionized water and alcohol, and dried at 70° C. to obtain the nanowire precursor.

[0044] 4) Put the precursor obtained in step 3) into a muffle furnace, raise the temperature to 500°C in the air and keep it warm for 2 hours, then cool naturally to room temperature to obtain Fe 2 (MoO 4 ) 3 nanoparticles.

[0045] 5) Take 0.15 g of the ferric molybdate particles p...

Embodiment 3

[0050] Graphene-coated Fe 2 (MoO 4 ) 3 A method for preparing nanoparticles, comprising the steps of:

[0051] 1) Mix 15 mL of cyclohexanol and 15 mL of cyclohexane, add 0.3 g of sodium lauryl sulfate to obtain a mixed solution;

[0052] 2) Dissolve 0.56g of ferric nitrate in 15mL of deionized water to obtain solution A, dissolve 0.37g of ammonium heptamolybdate in 15mL of deionized water to obtain solution B, and add A and B solutions to the mixed solution obtained in step 1) in turn Stir in.

[0053] 3) The product obtained in step 2) is centrifugally filtered, the obtained precipitate is repeatedly washed with deionized water and alcohol, and dried at 70° C. to obtain the nanowire precursor.

[0054] 4) Put the precursor obtained in step 3) into a muffle furnace, heat it up to 500°C in the air and keep it warm for 2 hours, then cool naturally to room temperature to obtain Fe 2 (MoO 4 ) 3 nanoparticles.

[0055] 5) Take 0.15 g of the ferric molybdate particles prepar...

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Abstract

The invention relates to a preparation method of graphene clad Fe2(MoO4)3 nanoparticle. The preparation method comprises the following steps of 1) mixing cyclohexane and cyclohexanol/n-pentyl alcohol, and then adding a surfactant to obtain a mixed liquid; 2) dissolving ferric nitrate in deionized water to obtain a solution A, dissolving ammonium molybdate in the deionized water to obtain a solution B, sequentially adding the solutions A and B into the mixed liquid obtained in the step 1), and stirring the liquid; 3) centrifugally filtering the liquid, and washing the liquid to obtain a precipitant, and drying the precipitant; 4) heating the precipitant in the air, and carrying out heat preservation to obtain molybdic acid nanoparticles; 5) adding a solution containing graphene and stirring the solution to obtain a precipitant; and 6) centrifugally filtering the precipitant, washing the precipitant with the deionized water and alcohol, and drying the product to obtain the graphene clad Fe2(MoO4)3 nanoparticle. The preparation method has the advantages that the graphene clad Fe2(MoO4)3 nanoparticle is endowed with excellent rate performance, relatively high specific capacity and improved cycle performance when the graphene clad Fe2(MoO4)3 nanoparticle is taken as a positive active material of a sodium ion battery, and is a high-rate and long-lifetime potential application material of the sodium ion battery.

Description

technical field [0001] The invention belongs to the technical field of nanomaterials and electrochemical devices, in particular to graphene-coated Fe 2 (MoO 4 ) 3 The preparation method of nano particles, the material can be used as the positive electrode active material of the sodium ion battery. Background technique [0002] With the rapid development of various electronic products, high-performance energy storage devices are more and more urgently needed by people. As an important green energy storage device in the new century, lithium secondary batteries have been widely used in various fields due to their advantages such as high energy density and long cycle life. However, with the advent of the era of electric vehicles and smart grids, the shortage of lithium resources and the high cost of lithium batteries have become important factors restricting its development. Therefore, it is urgent to develop a next-generation energy storage battery system with excellent com...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/36H01M4/583H01M4/62H01M4/50H01M4/52H01M10/054
CPCH01M4/366H01M4/50H01M4/502H01M4/52H01M4/523H01M4/583H01M4/625H01M10/054Y02E60/10
Inventor 安琴友臧涵麦立强彭陈盛进之
Owner WUHAN UNIV OF TECH
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