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Method for preparing nickel-iron sulfide nano-composite electrode through one-step electrodeposition

A technology of electrodepositing nickel and iron sulfide, which is applied in the manufacture of hybrid capacitor electrodes and hybrid/electric double layer capacitors, etc., can solve the problems of poor rate retention and poor conductivity of binary metal sulfides, and improve conductivity , Improving cycle stability and rate performance, and the effect of great application potential

Pending Publication Date: 2021-12-14
IANGSU COLLEGE OF ENG & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, during the charge-discharge process, binary metal sulfides have poor rate retention due to their poor electrical conductivity.

Method used

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  • Method for preparing nickel-iron sulfide nano-composite electrode through one-step electrodeposition
  • Method for preparing nickel-iron sulfide nano-composite electrode through one-step electrodeposition
  • Method for preparing nickel-iron sulfide nano-composite electrode through one-step electrodeposition

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] A preparation method for a one-step electrodeposited nickel-iron sulfide nanocomposite electrode, comprising:

[0040] (1) Pretreatment of carbon fiber cloth:

[0041] Cut the carbon fiber cloth into graphics of uniform size, for example, cut into strips with a size of 3cm×20cm;

[0042] Sonicate in a mixture of acetone and ethanol for 1 hour to remove dust;

[0043] After washing, immerse in an oil bath with a concentration of 5% potassium permanganate solution, the temperature of the oil bath is 80°C, and the soaking time is 40 minutes;

[0044] Ultrapure water is then used for ultrasonic cleaning until the lotion is clear and transparent, and finally dried in an oven at 60°C;

[0045] (2) Preparation of electrodeposition solution:

[0046] Electrochemical co-deposition of Ni-Fe-S on flexible carbon cloth with woven carbon fiber construction;

[0047] The electrodeposition solution contains ferric chloride hexahydrate and different concentrations of nickel dichlor...

Embodiment 2

[0052] A preparation method for a one-step electrodeposited nickel-iron sulfide nanocomposite electrode, comprising:

[0053] (1) Pretreatment of carbon fiber cloth:

[0054] Cut the carbon fiber cloth into graphics of uniform size, for example, cut into strips with a size of 3cm×20cm;

[0055] Ultrasound in acetone and ethanol mixed solution for 2 hours to remove dust;

[0056] After washing, immerse in an oil bath with a concentration of 5% potassium permanganate solution, the temperature of the oil bath is 90°C, and the soaking time is 50 minutes;

[0057] Ultrasonic cleaning is then performed with ultrapure water until the lotion is clear and transparent, and finally dried in an oven at 80°C;

[0058] (2) Preparation of electrodeposition solution:

[0059] Electrochemical co-deposition of Ni-Fe-S on flexible carbon cloth with woven carbon fiber construction;

[0060] The electrodeposition solution contains ferric chloride hexahydrate and different concentrations of nic...

Embodiment 3

[0065] A preparation method for a one-step electrodeposited nickel-iron sulfide nanocomposite electrode, comprising:

[0066] (1) Pretreatment of carbon fiber cloth:

[0067] Cut the carbon fiber cloth into graphics of uniform size, for example, cut into strips with a size of 3 cm×20 cm;

[0068] Ultrasonic in acetone and ethanol mixed solution for 1.5 hours to remove dust;

[0069] After washing, immerse in an oil bath with a concentration of 5% potassium permanganate solution, the temperature of the oil bath is 85°C, and the soaking time is 45 minutes;

[0070] Ultrasonic cleaning is then performed with ultrapure water until the lotion is clear and transparent, and finally dried in an oven at 70°C;

[0071] (2) Preparation of electrodeposition solution:

[0072] Electrochemical co-deposition of Ni-Fe-S on flexible carbon cloth with woven carbon fiber construction;

[0073] The electrodeposition solution contains ferric chloride hexahydrate and different concentrations of...

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Abstract

The invention discloses a preparation method of a one-step electrodeposition nickel-iron sulfide nano-composite electrode. The preparation method comprises the following steps: pretreatment of carbon fiber cloth: cutting the carbon fiber cloth into patterns with uniform sizes, performing ultrasonic treatment in a mixed solution of acetone and ethanol for a period of time, washing and then immersing the cloth into a potassium permanganate solution for oil bath, and finally, washing and drying; preparation of electro-deposition liquid: co-depositing Ni-Fe-S electrochemically on the flexible carbon cloth with the woven carbon fiber structure, wherein the electro-deposition solution contains ferric trichloride hexahydrate, nickel dichloride hexahydrate with different concentrations and thiourea, and obtaining five compounds with different concentrations; electrochemical deposition: taking carbon cloth as a working electrode, taking Pt as a counter electrode, taking Hg / HgCl as a reference electrode, adopting a cyclic voltammetry method to carry out electrodynamic deposition in a three-electrode system, and carrying out cyclic voltammetry tests for many times at a certain scanning rate under a certain voltage range condition; washing the carbon cloth subjected to electro-deposition with a large amount of deionized water, drying the carbon cloth, and determining the mass load of Ni-Fe-S on the carbon cloth according to the mass difference of an electronic balance before and after electro-deposition.

Description

technical field [0001] The invention belongs to the technical field of electrode materials, and in particular relates to a preparation method of a one-step electrodeposited nickel-iron sulfide nanocomposite electrode. Background technique [0002] With the further prosperity and development of human society, the consumption of fossil resources is accelerating, which has become a global problem. Therefore, efficient energy conversion and storage and the development of renewable energy have become a global focus. Lithium-ion batteries, as classic rechargeable energy storage devices, have proven to be of vital importance in the energy field of modern society due to their advantages in high energy density and operating voltage, good rechargeability, and sophisticated commercialization. important role. [0003] However, in addition to the scarcity and unbalanced geographical distribution of lithium resources, the fatal shortcoming of low power density of lithium-ion batteries h...

Claims

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Application Information

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IPC IPC(8): H01G11/86H01G11/24H01G11/30H01G11/36
CPCH01G11/86H01G11/30H01G11/36H01G11/24
Inventor 彭景富马骏贲礼进张新亮苏冬云卢欣欣高涛李军朱双春史茜刘旺达
Owner IANGSU COLLEGE OF ENG & TECH
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