a fes 2-x the se x Sodium Ion Capacitors Made of Negative Electrode Material

A negative electrode material and capacitor technology, applied in the field of capacitors, can solve the problems of no reports, and achieve the effects of enhanced electronic conductivity, high current charging and discharging capacity, and fast diffusion.

Inactive Publication Date: 2020-04-21
SHANDONG UNIV
View PDF3 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] After searching, there is no report on the application of transition metal sulfur / selenide in sodium ion capacitors

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • a fes <sub>2-x</sub> the se <sub>x</sub> Sodium Ion Capacitors Made of Negative Electrode Material
  • a fes <sub>2-x</sub> the se <sub>x</sub> Sodium Ion Capacitors Made of Negative Electrode Material
  • a fes <sub>2-x</sub> the se <sub>x</sub> Sodium Ion Capacitors Made of Negative Electrode Material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] a FeS 2-x Se x A sodium ion capacitor whose material is a negative electrode material, the sodium ion capacitor includes a positive electrode sheet, a negative electrode sheet, a diaphragm, an electrolyte and a casing.

[0045] The mass ratio of the active material in the positive electrode sheet to the active material in the negative electrode sheet is controlled at 4:1, and the electrolyte is NaClO 4 Soluble in tetraethylene glycol dimethyl ether, NaClO 4 The concentration is 1mol / L; the diaphragm material is Whatman GF / F glass microfiber.

[0046] The negative electrode sheet is obtained by mixing the active material, conductive agent, and binder, adding a solvent, grinding it into a slurry, and coating it on copper foil; the active material in the capacitor negative electrode sheet is FeS 2-x Se x Materials, the conductive agent is acetylene black, the binder is polyvinylidene fluoride (PVDF), the solvent is methylpyrrolidone (NMP), the mass ratio of active mate...

Embodiment 2

[0061] a FeS 2-x Se x Material is the sodium ion capacitor of negative electrode material, as shown in embodiment 1, difference is:

[0062] FeS 2-x Se x The preparation method of material comprises steps as follows:

[0063] (1) 1mmol FeSO 4 ·7H 2 0.5mmol urea is dissolved in the mixed solvent of dimethylformamide and ethylene glycol, dimethylformamide 15mL, ethylene glycol 20mL in the mixed solvent, then add sublimation sulfur, selenium powder, obtain mixed solution; Sublimation sulfur and The total molar weight of selenium powder is 6.5mmol, and the molar ratio of sublimated sulfur and selenium powder is 1:9;

[0064] (2) The mixed solution was transferred to a stainless steel reactor and placed in an oven, and reacted at 170°C for 22 hours;

[0065] (3) The product was centrifuged, washed several times with ethanol and water, and dried in a vacuum oven at 50°C for 16 hours, and FeS was successfully obtained 2- x Se x (x=0.2) Microspheres. FeS produced 2-x Se ...

Embodiment 3

[0067] a FeS 2-x Se x Material is the sodium ion capacitor of negative electrode material, as shown in embodiment 1, difference is:

[0068] FeS 2-x Se x The preparation method of material comprises steps as follows:

[0069] (1) 1mmol FeSO 4 ·7H 2 0.5mmol urea is dissolved in the mixed solvent of dimethylformamide and ethylene glycol, dimethylformamide 15mL, ethylene glycol 20mL in the mixed solvent, then add sublimation sulfur, selenium powder, obtain mixed solution; Sublimation sulfur and The total molar weight of selenium powder is 6.5mmol, and the molar ratio of sublimated sulfur and selenium powder is 1:9;

[0070] (2) The mixed solution was transferred to a stainless steel reaction kettle and placed in an oven, and reacted at 180°C for 20h;

[0071] (3) The product was centrifuged, washed several times with ethanol and water, and dried in a vacuum oven at 52°C for 14 hours to successfully obtain FeS 2- x Se x (x=0.2) Microspheres. FeS produced 2-x Se x The...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
particle sizeaaaaaaaaaa
particle sizeaaaaaaaaaa
Login to view more

Abstract

The invention relates to a sodium ion capacitor with a negative pole made of a FeS2-xSex material. The sodium ion capacitor comprises a positive pole sheet, a negative pole sheet, a diaphragm, an electrolyte and a shell; an active material, a conductive agent and a binder are mixed, a solvent is added into an obtained mixture, the solvent and the mixture are mixed to form a slurry, the slurry coats a collector, and therefore, the negative pole sheet can be obtained; and the active material in the negative pole sheet of the capacitor is the FeS2-xSex material, wherein x ranges from 0.1 to 1. The negative pole of the sodium ion capacitor of the invention is made of the FeS2-xSex material; the peak position of the XRD diffraction pattern of the FeS2-xSex material slightly shifts leftwards compared with that of FeS2, which indicates that an inter-layer spacing is increased, and therefore, the implanting and extraction of sodium ions can be better facilitated; the diffusion of Na<+> is faster, electronic conductivity is higher, and therefore, the high-current charge and discharge capacity of the sodium ion capacitor can be greatly improved, namely, the power performance of the sodium ion capacitor is improved; if the power density of the sodium ion capacitor is 172 W kg<-1>, the energy density of the sodium ion capacitor is as high as 67 Wh kg<-1>; and even if the power density of the sodium ion capacitor is as high as 2543 W kg<-1>, the energy density of the sodium ion capacitor is still maintained at about 27Wh kg<-1>.

Description

Technical field: [0001] The present invention relates to a kind of FeS 2-x Se x The invention relates to a sodium ion capacitor whose material is a negative electrode material, belonging to the technical field of capacitors. Background technique: [0002] Electrochemical energy storage devices, especially lithium-ion batteries, are widely used in portable electronic devices, electric vehicles, power stations, etc., and are one of the most mature and widely used electrochemical energy storage devices today. However, lithium in the crust The abundance in is very low. With the increasing demand for lithium-ion batteries in the new energy industry, there is a greater demand for lithium resources, and the rarity of lithium resources greatly limits the rapid development of lithium-ion batteries in large-scale energy storage devices, and The low power density of lithium-ion batteries also limits their application in high-power applications. Therefore, finding alternative lithiu...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Patents(China)
IPC IPC(8): H01G11/04H01G11/32H01G11/86H01G11/68
CPCH01G11/04H01G11/32H01G11/68H01G11/86Y02E60/13
Inventor 杨剑钱逸泰龙亚琼
Owner SHANDONG UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap