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Preparation method of carbon cloth-based ferric cobaltate/molybdenum disulfide graded structure electrode material

A carbon cloth-based cobalt acid and molybdenum disulfide technology, which is applied in the field of preparing carbon cloth-based iron cobaltate/molybdenum disulfide hierarchical structure electrode materials, can solve the problem of high theoretical capacitance of molybdenum disulfide and ineffective utilization of active sites , easy to reunite and other problems, to achieve the effect of ensuring cycle stability, less destructive, and improving wettability

Active Publication Date: 2019-07-09
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Molybdenum disulfide has a high theoretical capacitance, but it is easy to agglomerate in practical applications, and the active sites are not effectively utilized.

Method used

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  • Preparation method of carbon cloth-based ferric cobaltate/molybdenum disulfide graded structure electrode material
  • Preparation method of carbon cloth-based ferric cobaltate/molybdenum disulfide graded structure electrode material
  • Preparation method of carbon cloth-based ferric cobaltate/molybdenum disulfide graded structure electrode material

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Experimental program
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Effect test

Embodiment 1

[0035] Step 1. Preparation of carbon cloth-based iron cobaltate nanorod arrays:

[0036] Firstly, the carbon cloth is cut, the length and width are 3×1 cm, the carbon cloth is ultrasonically washed in acetone, 30% hydrochloric acid, deionized water and ethanol solution, and dried to obtain a dry carbon cloth; then take Add 1 mol of cobalt nitrate, 0.5 mol of ferric nitrate, 0.15 mol of ammonium fluoride, and 0.2 mol of urea powder into 40 mL of distilled water, sonicate for 10 min, stir with a magnetic stirrer for 20 min, and mix evenly to obtain ferric cobaltate The precursor solution was transferred to a stainless steel reaction kettle, and continued to heat up to 120°C for 12 hours, then cooled to room temperature, and the product was taken out, washed several times, dried in vacuum, and then put into a tube furnace for calcination at 400°C. The calcination speed was 3°C / min, keep warm for 1h to obtain carbon cloth-based iron cobaltate nanorod arrays;

[0037] Step 2, prep...

Embodiment 2

[0040] Step 1. Preparation of carbon cloth-based iron cobaltate nanorod arrays:

[0041] Firstly, the carbon cloth is cut, the length and width are 3×1 cm, the carbon cloth is ultrasonically washed in acetone, 30% hydrochloric acid, deionized water and ethanol solution, and dried to obtain a dry carbon cloth; then take Add 0.5 mol of cobalt nitrate, 0.25 mol of ferric nitrate, 0.12 mol of ammonium fluoride, and 0.15 mol of urea powder into 120 mL of distilled water, sonicate for 10 minutes, and stir with a magnetic stirrer for 20 minutes to mix evenly to obtain cobalt acid The iron precursor solution was transferred to a stainless steel reactor, and continued to heat up to 100°C for 24 hours, then cooled to room temperature, and the product was taken out, washed several times and dried in vacuum, then put into a tube furnace for calcination at 450°C, the calcination speed At 4°C / min, keep warm for 2 hours to obtain carbon cloth-based iron cobaltate nanorod arrays;

[0042] Step...

Embodiment 3

[0045] Step 1. Preparation of carbon cloth-based iron cobaltate nanorod arrays:

[0046] Firstly, the carbon cloth is cut, the length and width are 3×1 cm, the carbon cloth is ultrasonically washed in acetone, 30% hydrochloric acid, deionized water and ethanol solution, and dried to obtain a dry carbon cloth; then take Add 0.05 mol of cobalt nitrate, 0.025 mol of ferric nitrate, 0.1 mol of ammonium fluoride, and 0.1 mol of urea powder into 20 mL of distilled water, sonicate for 10 min, stir with a magnetic stirrer for 20 min, and mix well to obtain cobalt acid The iron precursor solution was transferred to a stainless steel reactor, and continued to heat up to 180°C for 24 hours, then cooled to room temperature, and the product was taken out, washed several times and dried in vacuum, then put into a tube furnace for calcination at 500°C, the calcination speed At 5°C / min, keep warm for 1h to obtain carbon cloth-based iron cobaltate nanorod arrays;

[0047] Step 2. Preparation ...

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Abstract

The invention belongs to the technical field of energy material, and relates to a preparation method of a carbon cloth-based ferric cobaltate / molybdenum disulfide graded structure electrode material.The preparation method comprises the steps: firstly preparing a carbon cloth-based ferric cobaltate nanorod array, adding thiourea and sodium molybdate into an alcohol solution, stirring, soaking thecarbon cloth-based ferric cobaltate nanorod array in the solution and stirring again, then transferring to a reaction kettle for heating reaction, cooling to room temperature after the reaction, and washing and vacuum drying so as to obtain the carbon cloth-based ferric cobaltate / molybdenum disulfide graded structure. The alcohol solvent is used, the alcohol solvent is a low-polar organic solvent, the hydroxyl group in the alcohol solution is more beneficial to improve the wettability of the electrode material and promote the electrode material to produce more active sites and has less damageto the morphology of carbon cloth-based ferric cobaltate nanorod array in comparison with the water. The formed electrode material is beneficial to increase the contact area between the material andthe electrolyte, improve the ion and electron transmission efficiency and reduce the internal resistance of the system. The rate performance can be improved and the cycle stability can be guaranteed.

Description

technical field [0001] The invention belongs to the technical field of energy materials, and in particular relates to a preparation method of a novel carbon cloth-based iron cobaltate / molybdenum disulfide hierarchical structure electrode material. Background technique [0002] With the utilization and destruction of non-renewable resources by human activities, new green and environment-friendly energy storage devices are crucial. Among them, supercapacitor refers to a new type of energy storage device between traditional capacitors and rechargeable batteries. It not only has the characteristics of fast charging and discharging of capacitors, but also has the characteristics of energy storage of batteries. At present, with its powerful storage capacity and storage performance, supercapacitors are specifically used in backup power supplies powered by small currents such as vacuum switches, instruments and meters, and digital cameras. Therefore, it is very important to choose ...

Claims

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Application Information

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IPC IPC(8): H01G11/30H01G11/32H01G11/46H01G11/86C01G39/06
CPCC01G39/06C01P2002/72C01P2004/03C01P2004/04C01P2006/40H01G11/30H01G11/32H01G11/46H01G11/86Y02E60/13
Inventor 赵岩袁铭陈媛林逢建黄云鹏连加彪许晖李华明袁寿其
Owner JIANGSU UNIV
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