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Silver vanadium oxide / polymer three coaxial nanowire and preparation method and application thereof

A technology of silver vanadium oxide and polymer, applied in the field of nanomaterials and electrochemistry, to improve cycle stability, prevent structural damage, improve specific capacity and cycle stability

Inactive Publication Date: 2012-04-11
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, triaxial nanowires with conductive polymer shells have not been reported

Method used

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  • Silver vanadium oxide / polymer three coaxial nanowire and preparation method and application thereof
  • Silver vanadium oxide / polymer three coaxial nanowire and preparation method and application thereof
  • Silver vanadium oxide / polymer three coaxial nanowire and preparation method and application thereof

Examples

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Embodiment 1

[0030] The preparation method of silver vanadium oxide / polyaniline triaxial nanowire, it comprises the steps:

[0031] 1) Weigh ammonium metavanadate containing 2 mmol of vanadium ions and dissolve in 40 mL of deionized water, then weigh the same amount of silver nitrate and dissolve in 40 mL of deionized water, mix the two solutions under stirring conditions, Continue to stir for 1 hour to obtain a precursor solution for subsequent use;

[0032] 2) Transfer the precursor solution obtained in step 1) to a 150 mL reactor, react at 180°C for 24 hours, take out the reactor, cool to room temperature naturally, and centrifuge to obtain the precipitate;

[0033] 3) The resulting precipitate was repeatedly washed with deionized water and dried in an oven at 80 °C to finally obtain β-AgVO 3 nanowire, spare;

[0034] 4) Weigh the β-AgVO obtained in step 3) 3 0.1 g of nanowires was dispersed into 20 mL of deionized water after stirring and ultrasonic treatment, and 0.05 g of aniline...

Embodiment 2

[0040] The preparation method of silver vanadium oxide / polyaniline triaxial nanowire, it comprises the steps:

[0041] 1) Weigh ammonium metavanadate containing 2 mmol of vanadium ions and dissolve in 40 mL of deionized water, then weigh the same amount of silver acetate and dissolve in 40 mL of deionized water, mix the two solutions under stirring conditions, Continue to stir for 1 hour to obtain a precursor solution for subsequent use;

[0042] 2) Transfer the precursor solution obtained in step 1) to a 150 mL reactor, react at 160°C for 36 hours, take out the reactor, cool to room temperature naturally, and centrifuge to obtain the precipitate;

[0043] 3) The resulting precipitate was repeatedly washed with deionized water and dried in an oven at 80 °C to finally obtain β-AgVO 3 nanowire, spare;

[0044] 4) Weigh the β-AgVO obtained in step 3) 3 0.1 g of nanowires was dispersed into 20 mL of deionized water after stirring and ultrasonic treatment, and 0.05 g of aniline...

Embodiment 3

[0047] The preparation method of silver vanadium oxide / polyaniline triaxial nanowire, it comprises the steps:

[0048] 1) Weigh vanadium pentoxide sol containing 3 mmol vanadium ions and dissolve it in 40 mL deionized water, then weigh the same amount of silver carbonate and dissolve it in 40 mL deionized water, and mix the two solutions under stirring , and continue to stir for 1 hour to obtain a precursor solution, which is set aside;

[0049] 2) Transfer the precursor solution obtained in step 1) to a 150 mL reactor, react at 200°C for 12 hours, take out the reactor, cool to room temperature naturally, and centrifuge to obtain the precipitate;

[0050] 3) The resulting precipitate was repeatedly washed with deionized water and dried in an oven at 80 °C to finally obtain β-AgVO 3 nanowire, spare;

[0051] 4) Weigh the β-AgVO obtained in step 3) 3 0.1g of nanowires was dispersed into 20 mL of deionized water after stirring and ultrasonic treatment, and 0.05 g of aniline m...

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Abstract

The invention relates to a silver vanadium oxide / polymer three coaxial nanowire and preparation method and application thereof, as well as the application of the materials as lithium ion battery anode active materials has a obvious three coaxial structure, the length is 10 to 30microns, the diameter is 60-100nm, in which the nuclear is the beta-AgVO3 nanowire, a middle layer is a silver vanadium oxide layer produced by the surface of the beta-AgVO3the nanowire losing parts of silver ions, an outer layer is a polymer layer, the thickness of the outer layer is 6 to10 nm, the thickness of the middle layer is 6 to10 nm, the beneficial effects of the invention are that: when the nanowire as the lithium ion battery anode active materials, the specific capacity and the cycle stability are significantly improved; and the prepared materials is high purity and good dispersion; also, the method related to the other three coaxial nanowire preparation, in-situ chemical polymerization is with water as the medium, the synthesis of the three coaxial nanowire can be achieved under normal temperature and normal pressure after a short time stirring, which is benefit for the market promotion.

Description

technical field [0001] The invention belongs to the technical field of nanomaterials and electrochemistry, and in particular relates to a silver vanadium oxide / polymer triaxial nanowire and a preparation method thereof, and the application of the material as a positive active material of a lithium ion battery. Background technique [0002] As a green energy source, lithium-ion batteries have been used in portable electronic devices and electric vehicles. Research on high-capacity, miniaturized, high-power, and low-cost lithium-ion batteries based on new nano-heterostructures is the key to lithium-ion batteries in the current low-carbon economic era. One of the frontiers and hotspots of research. Ag 2 V 4 o 11 It has the advantages of high energy density, safe and reliable performance, and is used as a lithium-ion primary battery material for cardiac pacemakers. and Ag 2 V 4 o 11 Compared to β-AgVO 3 It is considered to have better electrochemical performance due to h...

Claims

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Application Information

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IPC IPC(8): H01M4/60B82Y40/00
CPCY02E60/12Y02E60/10
Inventor 麦立强许絮韩春华高倩
Owner WUHAN UNIV OF TECH