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A kind of preparation method of graphene/iron oxide/polyaniline composite material

A composite material and polyaniline technology, applied in the field of composite materials, can solve the problems of less equipment investment, low rate performance, and low production cost, and achieve the effects of less equipment investment, high specific capacity, and low production cost.

Active Publication Date: 2018-08-10
SHANGHAI INST OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to solve above-mentioned deficiency and provide a kind of preparation method of graphene / iron oxide / polyaniline composite material, not only technological process is simple, operability is strong, and equipment investment is few, and production cost is low, and gained graphene The / iron oxide / polyaniline composite material has good electrochemical stability, high specific capacity, good cycle performance, and excellent rate performance, which solves the technical problems of poor stability and low rate performance of lithium-ion battery anode materials in the prior art

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preparation example Construction

[0016] The present invention provides a kind of preparation method of graphene / iron oxide / polyaniline composite material, and its working principle is: graphene oxide (GO) is ultrasonically dispersed uniformly, adds sodium dodecyl sulfate (SDS) aqueous solution and aniline to carry out Mix, ultrasonically form a stable and uniform mixed solution, stir in an ice-water bath and add ammonium persulfate (APS) acidified with hydrochloric acid dropwise, continue stirring in an ice-water bath for 12 hours, centrifuge the obtained dark green solution, and wash with water to obtain a gel-like substance , then ultrasonically disperse it in hydrochloric acid solution, then dropwise add saturated ferric chloride solution to continue ultrasonication, and finally stir it at room temperature for 1 hour, centrifuge at 180°C for 12 hours, wash with water, and freeze-dry. The concrete steps of this preparation method are as follows:

[0017] 1) The step of preparing polyaniline functionalized g...

Embodiment 1

[0022] A preparation method of graphene / iron oxide / polyaniline composite material, the steps are as follows:

[0023] Add 0.3ml of aniline and 10mg of sodium lauryl sulfate into 50ml of water for ultrasonic dispersion, mix the dispersed aniline solution with 60ml (0.5mg / ml) of GO dispersion, and continue ultrasonication for 15min to form a stable and uniform mixture solution, stirred in an ice-water bath, and then acidified 0.7g of ammonium persulfate with 50ml (1mol / L) HCl, the solution gradually turned dark green, kept stirring in an ice-water bath for 12 hours, and then the obtained solution was centrifuged and washed 3 times with water to obtain a gel Then, ultrasonically disperse it in 180ml of water, add 10ml (1mol / L) HCl dropwise therein, slowly add 5ml of saturated ferric chloride solution dropwise while ultrasonicating, then stir it at room temperature for 1 hour, and then add Put it into a hydrothermal kettle, react at 180° C. for 12 hours, and finally carry out cent...

Embodiment 2

[0025] A preparation method of graphene / iron oxide / polyaniline composite material, the steps are as follows:

[0026] Add 0.2ml of aniline and 8mg of sodium lauryl sulfate into 50ml of water for ultrasonic dispersion, mix the dispersed aniline solution with 30ml (0.5mg / ml) of GO dispersion, and continue ultrasonication for 15min to form a stable and uniform mixture solution, stirred in an ice-water bath, and then acidified 0.35g of ammonium persulfate with 25ml (1mol / L) HCl, the solution gradually turned dark green, kept stirring in an ice-water bath for 12 hours, and then the obtained solution was centrifuged and washed 3 times with water to obtain a gel Then, ultrasonically disperse it in 90ml water, add 5ml (1mol / L) HCl dropwise therein, slowly add 2.4ml saturated ferric chloride solution dropwise while ultrasonically, then stir it at room temperature for 1 hour, then Put it into a hydrothermal kettle, react at 180° C. for 12 hours, and finally carry out centrifugal washing...

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Abstract

The invention relates to a preparation method of a graphene / ferric oxide / polyaniline composite material. The method comprises the following steps: ultrasonically uniformly dispersing graphene oxide; adding a sodium dodecyl sulfate aqueous solution and aniline to mix; ultrasonically forming a stable and uniform mixing solution; stirring in an ice-water bath, and dropwise adding ammonium persulfate which is acidized by hydrochloric acid; continuously stirring in the ice-water bath for 12 hours; performing centrifuging and water washing on the obtained dark-green solution to obtain a gel type substance; ultrasonically dispersing the gel type substance into a hydrochloric acid solution; then dropwise adding a saturated ferric chloride solution, and continuously ultrasonically treating; stirring for 1 hour under room temperature; heating through water for 12 hours at the temperature of 180 DEG C; finally performing centrifuging, water washing and freeze drying to obtain the graphene / ferric oxide / polyaniline composite material. The method is simple in process, high in operability, small in equipment investment, and low in production cost; the graphene / ferric oxide / polyaniline composite material prepared through the method is high in electrochemical stability, high in specific capacity, excellent in circulating performance, and outstanding in rate capability.

Description

[technical field] [0001] The invention belongs to the technical field of composite materials, in particular to a method for preparing a graphene / iron oxide / polyaniline composite material. [Background technique] [0002] Graphene, as a typical two-dimensional material, has received extensive attention and research since it was first discovered in 2004. Because graphene has many excellent properties, the performance of its composite materials has also been greatly improved. As a conductive polymer, polyaniline has a long-range conjugated structure that gives it unique electrical and optical properties. Not only that, but its unique molecular structure can also interact with the π system of graphene and the residual oxygen-containing functional groups. Non-covalent interactions such as π-π stacking, hydrogen bonding, and electrostatic forces lead to the preparation of a composite material with excellent optoelectronic properties. [0003] With the rapid development of technol...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L79/02C08K3/04C08K3/22C08G73/02
CPCC08G73/0266C08K3/04C08K3/22C08K2003/2272C08L2203/20C08L79/02
Inventor 韩生刘金宝蔺华林陈红艳喻宁波冯晨萁韦焕明韩治亚
Owner SHANGHAI INST OF TECH
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