Orientated growth FeS nanomaterial based on carbon cloth, and preparation method and application of FeS nanomaterial

A directional growth and nanomaterial technology, applied in the field of FeS nanomaterials based on carbon cloth directional growth and its preparation, can solve the problem of low utilization rate of effective charging and discharging active points, large microscopic size of electrode materials, hindering electrochemical sodium storage capacity, etc. It can improve the conductivity and structural stability, improve the electrochemical sodium storage performance, and achieve the effect of high capacity.

Active Publication Date: 2019-08-27
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the lack of high electrical conductivity, poor interfacial compatibility with organic electrolytes, large microscopic size of electrode materials, and low utilization of active sites for effective charge and discharge greatly hinder its ability to electrochemically store sodium.
At the same time, due to the high resistivity of FeS, the voltage drops rapidly during discharge, especially when the battery is discharged with a large current, it will cause serious polarization, which greatly shortens the working life of the battery.

Method used

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  • Orientated growth FeS nanomaterial based on carbon cloth, and preparation method and application of FeS nanomaterial
  • Orientated growth FeS nanomaterial based on carbon cloth, and preparation method and application of FeS nanomaterial
  • Orientated growth FeS nanomaterial based on carbon cloth, and preparation method and application of FeS nanomaterial

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] 1) Take a certain quality of analytically pure ferric ammonium oxalate 2g, urea 4g, mix and grind in a glass mortar to obtain a mixture, and the mixture is denoted as A;

[0031] 2) Take a carbon cloth with a size of about 3cm×6cm and soak it in 25g NH 3 h 2 PO 4 1200ml of water, using the anodic oxidation method, the carbon cloth is treated with electricity at a voltage of 5V for 2 minutes, and then taken out for use;

[0032] 3) Mix mixture A and polyacrylamide at a mass ratio of 3:1, add deionized water, the volume is 20ml, stir for 15min, put the treated carbon cloth into the polytetrafluoroethylene lining, and make the mixture solution Completely immerse the carbon cloth;

[0033] 4) Put the inner liner into the hydrothermal outer kettle, fix and seal it well, and put it into the homogeneous reactor, the reaction temperature range is 250°C, and the reaction time range is 12h;

[0034] 5) After the reaction is over, take out the carbon cloth and put it in a vacu...

Embodiment 2

[0038] 1) Take a certain quality of analytically pure ferric citrate 2g, urea 6g, mix and grind in a glass mortar to obtain a mixture, and the mixture is denoted as A;

[0039] 2) Take a carbon cloth with a size of about 3cm×6cm and soak it in 25g NH 3 h 2 PO 4 1200ml of water, using the anodic oxidation method, the carbon cloth is treated with electricity at a voltage of 5V for 2 minutes, and then taken out for use;

[0040] 3) Mix mixture A and polyacrylamide at a mass ratio of 3:1, add deionized water to a volume of 50ml, stir for 15 minutes and put the treated carbon cloth into the polytetrafluoroethylene lining to make the mixture solution Completely immerse the carbon cloth;

[0041] 4) Put the inner liner into the hydrothermal outer kettle, fix and seal it well, and put it into the homogeneous reactor, the reaction temperature range is 150°C, and the reaction time range is 6h;

[0042] 5) After the reaction is over, take out the carbon cloth and put it in a vacuum o...

Embodiment 3

[0046] 1) Take a certain quality of analytically pure ferric ammonium oxalate 1g, urea 7g, mix and grind in a glass mortar to obtain a mixture, and the mixture is denoted as A;

[0047] 2) Take a carbon cloth with a size of about 3cm×6cm and soak it in 25g NH 3 h 2 PO 41200ml of water, using the anodic oxidation method, the carbon cloth is treated with electricity at a voltage of 5V for 2 minutes, and then taken out for use;

[0048] 3) Mix mixture A and polyacrylamide at a mass ratio of 3:1, add deionized water to a volume of 30ml, stir for 15 minutes and put the treated carbon cloth into the polytetrafluoroethylene lining to make the mixture solution Completely immerse the carbon cloth;

[0049] 4) Put the inner liner into the hydrothermal outer kettle, fix and seal it well, and put it into the homogeneous reactor, the reaction temperature range is 250°C, and the reaction time range is 2h;

[0050] 5) After the reaction is over, take out the carbon cloth and put it in a ...

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Abstract

The invention discloses an orientated growth FeS nanomaterial based on carbon cloth, and a preparation method and an application of the FeS nanomaterial. The preparation method comprises the steps of:1) mixing and grinding analytically pure organic acid iron salt and urea at a mass ratio of 1:(1-7) to form a mixture A, 2) activating the carbon cloth for future use, 3) mixing the mixture A and polyacrylamide at a mass ratio of 3:1 for carbon hydrothermal reaction, 5) performing drying after the reaction is finished, and 6) loading the dried carbon cloth and excessive thiourea in a porcelain boat for high temperature calcination to form the orientated growth FeS nanomaterial based on the carbon cloth. The prepared densely growing FeS nanomaterial based on the carbon cloth integrates the advantages of high capacity, easy synthesis and low preparation cost of an iron sulfide material and strong electric conductivity, fixed and fine crystal grains, strong adsorptive capacity and the like of the carbon cloth, and has very high sodium ion storage performance, high charging and discharging capacity and good rate capability.

Description

technical field [0001] The invention belongs to the field of composite material synthesis, and in particular relates to a FeS nanometer material based on carbon cloth directional growth and its preparation method and application. Background technique [0002] Due to the wide distribution and abundant reserves of sodium in the earth, in recent years, the research and development of room temperature sodium-ion charge-discharge batteries has been considered as a substitute for lithium-ion batteries in large-scale energy storage, especially in the fields of smart grids, to effectively solve the problem of lithium-ion batteries. An effective approach to the problem of low mineral reserves and high cost of lithium sources. Among the many anode material systems for sodium-ion batteries, carbon, metal oxides or sulfides, and alloy materials such as Sn and Sb are the most concerned types of material systems by scholars. Among them, metal sulfides are potential negative electrode mat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/342C01B32/354C01G49/12H01M4/58H01M10/054B82Y30/00
CPCB82Y30/00C01G49/12C01P2002/72C01P2004/03C01P2006/40C01B32/342C01B32/354H01M4/5815H01M10/054Y02E60/10
Inventor 曹丽云王蓉黄剑锋李嘉胤许占位郭鹏辉郭玲罗晓敏
Owner SHAANXI UNIV OF SCI & TECH
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