Preparation method of fiber/graphene/zinc sulfide flexible electrode material

Abstract

The invention discloses a preparation method of a fiber / graphene / zinc sulfide flexible electrode material. The preparation method comprises the following steps of A, steeping preprocessed fiber fabricinto graphene oxide suspension liquid and drying, repeating the step for many times to acquire fiber / graphene oxide material, wherein the graphene oxide suspension liquid is prepared by ultrasonically dispersing graphene oxide powder into deionized water; B, performing in-situ reduction on the fiber / graphene oxide material to acquire fiber / graphene material; and C, steeping the fiber / graphene material acquired in the step B to a hydrothermal reaction kettle including zinc salt and sulfur-containing polymeric precursor solution, and synthesizing the fiber / graphene / zinc sulfide flexible electrode material via a heating reaction. The material prepared according to the method provided by the invention, carbon material with good conductivity is compounded with zinc sulfide with high specific capacitance and poor conductivity, and gives full play to advantages of the carbon material and zinc sulfide. The fiber / graphene / zinc sulfide flexible electrode material has relatively high area ratiocapacitance and power characteristic and excellent cycle performance.

Description

technical field

[0001] The invention relates to a preparation method of a flexible electrode material, in particular to a preparation method of a fiber / graphene / zinc sulfide flexible electrode material. Background technique

[0002] Electrochemical capacitors are widely used in fields such as hybrid vehicles, communications, national defense, and wearable electronics based on their special features such as high capacity and high power density. As today's electronic devices are becoming thinner and more flexible, portable and wearable electronic devices such as flexible displays, distributed sensors, electronic paper and wearable multimedia devices are increasingly entering people's daily lives. However, traditional electrochemical capacitors are bulky, heavy, and have a fixed shape, which is far from meeting the development requirements of current flexible electronic devices. There is an urgent need to develop flexible electrochemical capacitors and their electrode material...

Examples

Embodiment 1

[0026] The graphene oxide powder was added into deionized water, and ultrasonicated for 60 minutes to make a graphene oxide suspension with a concentration of 1.5 mg / L. Cotton fabrics were treated with 1mol / L sodium hydroxide solution at 100°C for 2h, then cleaned with deionized water, and dried in a drying oven at 110°C for 2h. The pretreated cotton fabric was dipped into the prepared graphene oxide suspension, stirred at room temperature for 30 min, then dried in a vacuum oven at 50°C for 2 h, and the dipping-drying process was repeated 20 times. Immerse the cotton / graphene oxide composite fabric in NaBH with a concentration of 0.5mol / L 4 The solution was stirred at room temperature for 12 hours, then taken out and washed three times with deionized water, dried at 100° C. for 2 hours, and reduced to obtain a cotton / graphene composite material.

[0027] The cotton / graphene composite material was immersed in a hydrothermal reaction kettle containing zinc chloride and thiourea...

Embodiment 2

[0029] The graphene oxide powder was added into deionized water, and the graphene oxide suspension with a concentration of 2 mg / L was prepared by ultrasonication for 30 min. Cotton fabrics were treated with 0.5mol / L sodium bicarbonate solution at 90°C for 3h, then cleaned with deionized water, and dried in a drying oven at 100°C for 2.5h. The pretreated cotton fabric was dipped into the prepared graphene oxide suspension, stirred at room temperature for 20 min, then dried in a vacuum oven at 50°C for 3 h, and the dipping-drying process was repeated 30 times. Immerse the cotton / graphene oxide composite fabric in NaBH with a concentration of 0.1mol / L 4 The solution was stirred at room temperature for 12 hours, then taken out and washed three times with deionized water, dried at 100° C. for 2 hours, and reduced to obtain a cotton / graphene composite material.

[0030] Immerse the cotton / graphene composite material into a hydrothermal reaction kettle containing zinc chloride and c...

Embodiment 3

[0032] The graphene oxide powder was added into deionized water, and ultrasonically charged for 60 minutes to make a graphene oxide suspension with a concentration of 2.5 mg / L. Cotton fabrics were treated with 1mol / L sodium hydroxide solution at 110°C for 1h, then cleaned with deionized water, and dried in a 90°C drying oven for 3h. The pretreated cotton fabric was dipped into the prepared graphene oxide suspension, stirred at room temperature for 40 min, then dried in a vacuum oven at 40°C for 2.5 h, and the dipping-drying process was repeated 20 times. The cotton / graphene oxide composite fabric was placed in a high-temperature tube furnace at a heating rate of 2°C / min at 250°C, N 2 Under atmospheric conditions, the cotton / graphene composite material was obtained through high-temperature reaction for 3 hours.

[0033] The cotton / graphene composite was immersed in a hydrothermal reactor containing PEG-400 (0.1%), zinc acetate and thioacetamide solution (zinc:sulfur molar rati...

technical field

[0001] The invention relates to a preparation method of a flexible electrode material, in particular to a preparation method of a fiber / graphene / zinc sulfide flexible electrode material. Background technique

[0002] Electrochemical capacitors are widely used in fields such as hybrid vehicles, communications, national defense, and wearable electronics based on their special features such as high capacity and high power density. As today's electronic devices are becoming thinner and more flexible, portable and wearable electronic devices such as flexible displays, distributed sensors, electronic paper and wearable multimedia devices are increasingly entering people's daily lives. However, traditional electrochemical capacitors are bulky, heavy, and have a fixed shape, which is far from meeting the development requirements of current flexible electronic devices. There is an urgent need to develop flexible electrochemical capacitors and their electrode material...

Examples

Embodiment 1

[0026] The graphene oxide powder was added into deionized water, and ultrasonicated for 60 minutes to make a graphene oxide suspension with a concentration of 1.5 mg / L. Cotton fabrics were treated with 1mol / L sodium hydroxide solution at 100°C for 2h, then cleaned with deionized water, and dried in a drying oven at 110°C for 2h. The pretreated cotton fabric was dipped into the prepared graphene oxide suspension, stirred at room temperature for 30 min, then dried in a vacuum oven at 50°C for 2 h, and the dipping-drying process was repeated 20 times. Immerse the cotton / graphene oxide composite fabric in NaBH with a concentration of 0.5mol / L 4 The solution was stirred at room temperature for 12 hours, then taken out and washed three times with deionized water, dried at 100° C. for 2 hours, and reduced to obtain a cotton / graphene composite material.

[0027] The cotton / graphene composite material was immersed in a hydrothermal reaction kettle containing zinc chloride and thiourea...

Embodiment 2

[0029] The graphene oxide powder was added into deionized water, and the graphene oxide suspension with a concentration of 2 mg / L was prepared by ultrasonication for 30 min. Cotton fabrics were treated with 0.5mol / L sodium bicarbonate solution at 90°C for 3h, then cleaned with deionized water, and dried in a drying oven at 100°C for 2.5h. The pretreated cotton fabric was dipped into the prepared graphene oxide suspension, stirred at room temperature for 20 min, then dried in a vacuum oven at 50°C for 3 h, and the dipping-drying process was repeated 30 times. Immerse the cotton / graphene oxide composite fabric in NaBH with a concentration of 0.1mol / L 4 The solution was stirred at room temperature for 12 hours, then taken out and washed three times with deionized water, dried at 100° C. for 2 hours, and reduced to obtain a cotton / graphene composite material.

[0030] Immerse the cotton / graphene composite material into a hydrothermal reaction kettle containing zinc chloride and c...

Embodiment 3

[0032] The graphene oxide powder was added into deionized water, and ultrasonically charged for 60 minutes to make a graphene oxide suspension with a concentration of 2.5 mg / L. Cotton fabrics were treated with 1mol / L sodium hydroxide solution at 110°C for 1h, then cleaned with deionized water, and dried in a 90°C drying oven for 3h. The pretreated cotton fabric was dipped into the prepared graphene oxide suspension, stirred at room temperature for 40 min, then dried in a vacuum oven at 40°C for 2.5 h, and the dipping-drying process was repeated 20 times. The cotton / graphene oxide composite fabric was placed in a high-temperature tube furnace at a heating rate of 2°C / min at 250°C, N 2 Under atmospheric conditions, the cotton / graphene composite material was obtained through high-temperature reaction for 3 hours.

[0033] The cotton / graphene composite was immersed in a hydrothermal reactor containing PEG-400 (0.1%), zinc acetate and thioacetamide solution (zinc:sulfur molar rati...