NiO/Fe2VO4-based nanocomposite electrode

Patent metadata

Field	Value
Publication number	US-12469843-B2
Application number	US-202318152529-A
Country	US
Kind code	B2
Filing date	Jan 10, 2023
Priority date	Jan 10, 2023
Publication date	Nov 11, 2025
Grant date	Nov 11, 2025

Abstract

A nanocomposite electrode including a substrate, a binding compound, a conductive additive, and NiO/Fe2VO4 nanoparticles. The NiO/Fe2VO4 nanoparticles have a substantially spherical shape. A mixture of the binding compound, the conductive additive and the NiO/Fe2VO4 nanoparticles, is at least partially coated on a first surface of the substrate. A method of making the NiO/Fe2VO4 nanoparticles is described.

First claim

The invention claimed is:

1 . A nanocomposite electrode, comprising:
a substrate; a binding compound; a conductive additive; and NiO/Fe 2 VO 4 nanoparticles, wherein the NiO/Fe 2 VO 4 nanoparticles have a substantially spherical shape, wherein a mixture of the binding compound, the conductive additive and the NiO/Fe 2 VO 4 nanoparticles is at least partially coated on a first surface of the substrate.

2 . The nanocomposite electrode of claim 1 , wherein the NiO/Fe 2 VO 4 nanoparticles have an average diameter of 1-20 nanometers (nm).

3 . The nanocomposite electrode of claim 1 , wherein the NiO/Fe 2 VO 4 nanoparticles are aggregated and have an average aggregate size of 1 to 50 micrometers (μm).

4 . The nanocomposite electrode of claim 1 , wherein the NiO/Fe 2 VO 4 nanoparticles are aggregated and form an interconnected chain.

5 . The nanocomposite electrode of claim 1 , wherein the NiO/Fe 2 VO 4 nanoparticles form an interconnected chain while dispersed in a matrix of the conductive additive.

6 . The nanocomposite electrode of claim 1 , wherein the mixture comprises of 5-10 wt. % of the binding compound, 70-90 wt. % of the conductive additive, and 1-20 wt. % of the NiO/Fe 2 VO 4 nanoparticles, based on a total weight of the mixture.

7 . The nanocomposite electrode of claim 1 , wherein the mixture comprises 70-90 wt. % C, 0.5-5 wt. % V, 1-10 wt. % Fe, and 1-10 wt. % Ni based on the total weight of the mixture.

8 . The nanocomposite electrode of claim 1 , wherein the elements V, C, Fe, and Ni are homogeneously distributed on the first surface of the substrate.

9 . The nanocomposite electrode of claim 1 , wherein the substrate is made from at least one material selected from the group consisting of stainless steel, aluminum, nickel, copper, platinum, zinc, tungsten, and titanium.

10 . The nanocomposite electrode of claim 1 , wherein the conductive additive is at least one selected from the group consisting of graphite, activated carbon, reduced graphene oxide, carbon nanotubes, carbon nanofibers, and carbon black.

11 . The nanocomposite electrode of claim 1 , wherein the binding compound is at least one selected from the group consisting of polyvinylidene fluoride (PVDF) and N-methyl pyrrolidone (NMP).

12 . The nanocomposite electrode of claim 1 , wherein the first surface of the substrate is hydrophilic.

13 . The nanocomposite electrode of claim 1 , wherein the first surface of the substrate has a water contact angle less than 37°.

14 . A supercapacitor device, comprising:
two symmetrically facing nanocomposite electrodes of claim 1 , wherein the first surfaces coated with the mixture face inwards; and an electrolyte is disposed between and is in contact with the first surfaces.

15 . The supercapacitor device of claim 14 , wherein the electrolyte is a gel electrolyte.

16 . The supercapacitor device of claim 14 , wherein the electrolyte is a glycerol/KOH gel electrolyte.

17 . The supercapacitor device of claim 14 , wherein the electrolyte is anhydrous.

18 . The supercapacitor device of claim 14 , having a specific capacitance of 250-300 Farad per gram (F/g) at a current density of 1-5 ampere per gram (A/g).

19 . A battery, comprising 2-10 of the supercapacitor devices of claim 14 connected in parallel and/or series.

20 . A method of making the NiO/Fe 2 VO 4 nanoparticles of claim 1 , the method comprising:
mixing an iron salt, a nickel salt, and a vanadium salt in water to form an aqueous solution; sonicating the aqueous solution for at least 5 minutes to form a homogeneous solution; adding a base while sonicating the homogeneous solution to form a precipitate slurry; heating the precipitate slurry to 50-150° C. for at least 10 minutes to form a heated mixture; separating a precipitate from the heated mixture to obtain a powder; and calcining the powder at a temperature of 100 to 600° C. to obtain the NiO/Fe 2 VO 4 nanoparticles, wherein a molar ratio of the iron salt, the nickel salt, and the vanadium salt is 1-10 to 1-10 to 1-10.

Assignees

• Univ Imam Abdulrahman Bin Faisal

Inventors

• Cevik Emre
• Bozkurt Ayhan

Classifications

• H01M10/0565

  Polymeric materials, e.g. gel-type or solid-type · CPC title

• H01M2004/021

  Physical characteristics, e.g. porosity, surface area · CPC title

• H01M4/0404 Primary

  by coating on electrode collectors · CPC title

• H01M2300/0082

  Organic polymers · CPC title

• H01M4/623

  fluorinated polymers · CPC title