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

A technology of structural materials and internal connections, which is applied in the field of nanomaterials and electrochemistry, can solve the problems of damaging cycle performance and low lithium ion conductivity, and achieve the effects of suppressing rupture, suppressing capacity fading, and facilitating market promotion

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] 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;

[0025] 2) Add 0.0013mol of NH to the solution 4 F, continue stirring for 30min;

[0026] 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), and put the reactor into a 200°C oven for hydrothermal reaction for 24h, namely SnO 2 Nickel foam with nanorod arrays;

[0027] 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;

[0028] 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 reference electrode, and the platinum electrode was used as the counter electrode to perform electrodeposition ...

Embodiment 2

[0034] 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;

[0035] 2) Add 0.0013mol of NH to the solution 4 F, continue stirring for 30min;

[0036] 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), and put the reactor into a 200°C oven for hydrothermal reaction for 24h, namely SnO 2 Nickel foam with nanorod arrays;

[0037] 4) Disperse pyrrole monomer in 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;

[0038] 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 reference electrode, and the platinum electrode was used as the counter electrode to perform electrodeposition o...

Embodiment 3

[0041] 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;

[0042] 2) Add 0.0013mol of NH to the solution 4 F, continue stirring for 30min;

[0043] 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), and put the reactor into a 200°C oven for hydrothermal reaction for 24h, namely SnO 2 Nickel foam with nanorod arrays;

[0044] 4) Disperse pyrrole monomer in 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;

[0045] 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 reference electrode, and the platinum electrode was used as the counter electrode to perform electrodeposition ...

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Abstract

The invention relates to a SnO2@PPy interconnection nano-sheet structural material as well as a preparation method and application thereof. The nano-sheet structural material is of a three-dimensional interconnection structure formed by coating the surfaces of SnO2 nanorods growing on nickel foam with polymer pyrrole (PPy) 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 30-60 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 700 seconds at a current density of 2.5mA / cm<2> and washing. The SnO2@PPy interconnection nano-sheet structural material has the beneficial effect of being prepared by depositing polypyrrole through a constant current timing method so that the structural material becomes a potential application material of a lithium-ion battery, is in line with the requirements of green chemistry and is conductive to market promotion.

Description

technical field [0001] The invention belongs to the technical field of nanomaterials and electrochemistry, in particular to SnO 2 A PPy interconnected nano sheet structure material and a preparation method thereof, 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, there will be volume expans...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/36H01M4/139B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00H01M4/131H01M4/137H01M4/1391H01M4/1399H01M4/362H01M4/483H01M4/602H01M10/0525H01M2004/027Y02E60/10
Inventor 麦立强夏睿张磊许旺旺赵康宁
Owner WUHAN UNIV OF TECH
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