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SnO2@PPy nano-film structural material as well as preparation method and application thereof

A technology of nano-film and structural materials, applied in the field of nano-materials and electrochemistry, can solve the problems of low lithium ion conductivity and damage cycle performance, and achieve the effect of improving material conductivity, improving rate performance, and preventing structural damage.

Inactive Publication Date: 2015-05-06
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, SnO 2 Due to the low conductivity of lithium ions, there will be volume expansion during charging and discharging, which will cause damage to the junction and result in poor cycle performance, which limits its application.

Method used

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  • SnO2@PPy nano-film structural material as well as preparation method and application thereof
  • SnO2@PPy nano-film structural material as well as preparation method and application thereof
  • SnO2@PPy nano-film structural material as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] SnO 2 The preparation method of PPy nano film material comprises the following steps:

[0027] 1) Add 0.0038mol of SnCl to the container 4 .5H 2 O and 0.031mol of NaOH, then add 30ml of deionized water, stir in air for 30min;

[0028] 2) Add 0.0013mol of NH to the solution 4 F, continue stirring for 30min;

[0029] 3) Put the foamed nickel (a square with a diameter of 2.5cm) that has been cleaned and acidified into the reactor and pour the solution obtained in step 2), put the reactor into a 200°C oven for hydrothermal reaction for 24h, and obtain Grown SnO 2 Nickel foam with nanorod arrays;

[0030] 4) Disperse pyrrole monomer in lithium perchlorate acetonitrile solution, wherein the concentration of pyrrole monomer is 10mmol L -1 , the lithium perchlorate concentration is 100mmol L -1 , mixed and stirred for 30min;

[0031] 5) With already grown SnO 2 The nickel foam of the nanorod array was used as the working electrode, the Ag / AgCl was used as the referenc...

Embodiment 2

[0037] SnO 2 The preparation method of PPy nano film material comprises the following steps:

[0038] 1) Add 0.0038mol of SnCl to the container 4 .5H 2 O and 0.031mol of NaOH, then add 30ml of deionized water, stir in air for 30min;

[0039] 2) Add 0.0013mol of NH to the solution 4 F, continue stirring for 30min;

[0040] 3) Put the foamed nickel (a square with a diameter of 2.5cm) that has been cleaned and acidified into the reactor and pour the solution obtained in step 2), put the reactor into a 200°C oven for hydrothermal reaction for 24h, and obtain Grown SnO 2 Nickel foam with nanorod arrays;

[0041] 4) Disperse pyrrole monomer in 1 lithium perchlorate acetonitrile solution, wherein the concentration of pyrrole monomer is 100mmol L -1 , the lithium perchlorate concentration is 10mmol L -1 , mixed and stirred for 30min;

[0042] 5) With already grown SnO 2 The nickel foam of the nanorod array was used as the working electrode, the Ag / AgCl was used as the refere...

Embodiment 3

[0045] SnO 2 The preparation method of PPy nano film material comprises the following steps:

[0046] 1) Add 0.0038mol of SnCl to the container 4 .5H 2 O and 0.031mol of NaOH, then add 30ml of deionized water, stir in air for 30min;

[0047] 2) Add 0.0013mol of NH to the solution 4 F, continue stirring for 30min;

[0048] 3) Put the foamed nickel (a square with a diameter of 2.5cm) that has been cleaned and acidified into the reactor and pour the solution obtained in step 2), put the reactor into a 200°C oven for hydrothermal reaction for 24h, and obtain Grown SnO 2 Nickel foam with nanorod arrays;

[0049] 4) Disperse pyrrole monomer in 1 lithium perchlorate acetonitrile solution, wherein the concentration of pyrrole monomer is 50mmol L -1 , the lithium perchlorate concentration is 50mmol L -1 , mixed and stirred for 30min;

[0050] 5) With already grown SnO 2 The nickel foam of the nanorod array was used as the working electrode, the Ag / AgCl was used as the referen...

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Abstract

The invention relates to a SnO2@PPy nano-film structural material as well as a preparation method and application thereof. The SnO2@PPy nano-film structural material is formed by coating the surfaces of SnO2 nanorods growing on nickel foam with polymer pyrrole (PPy), wherein the thickness of the film formed by PPy is 0.8-1.5mu m and is prepared by the following method comprising the following steps: (1) dispersing pyrrole monomer in 50ml lithium perchlorate-acetonitrile solution, mixing and stirring for 30 minutes; (2) by taking nickel foam on which SnO2 nanorod arrays grow as a working electrode, Ag / AgCl as a reference electrode and a platinum electrode as a counter electrode, carrying out electrodeposition for 2000 seconds at a current density of 2.5mA / cm<2> and washing. The SnO2@PPy interconnection nano-sheet structural material has the beneficial effects that PPy grows on the surfaces of the SnO2 nanorods by adopting an electrochemical-deposition method so that the effect of a buffer layer can be achieved, the electrical conductivity of the material is increased and the cycling stability of the electrode material is improved.

Description

technical field [0001] The invention belongs to the technical field of nanometer material and electrochemistry, specifically relates to SnO 2 The invention discloses a PPy nano film structure material and a preparation method thereof, and the material can be used as a lithium ion battery negative electrode active material. Background technique [0002] As a green energy storage device, lithium-ion batteries have been widely used in mobile phones, computers, electric vehicles and other fields. Therefore, research on new nanostructures to obtain lithium-ion batteries with higher capacity, good safety performance and low cost has It has become the frontier and hotspot of current research on lithium-ion batteries. while SnO 2 As an anode material for lithium-ion batteries, it has a higher theoretical capacity than graphite currently used, and it has great potential as an anode material for lithium-ion batteries. However, SnO 2 Due to the low conductivity of lithium ions, the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/36B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00H01M4/131H01M4/137H01M4/1391H01M4/1399H01M4/362H01M4/483H01M4/602H01M10/0525H01M2004/027Y02E60/10
Inventor 麦立强张磊夏睿赵康宁许旺旺
Owner WUHAN UNIV OF TECH
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