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Cobalt ferrite-graphene-polyaniline ternary nano composite material and preparation method thereof

A technology of nanocomposite materials and composite materials, which is applied in the field of cobalt ferrite-graphene-polyaniline ternary nanocomposite materials and its preparation, can solve the problems of shortage and shortage, and achieve good application prospects and economic benefits, excellent electricity The effect of chemical properties

Inactive Publication Date: 2014-10-29
NANJING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are very few reports about cobalt ferrite on supercapacitors.

Method used

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  • Cobalt ferrite-graphene-polyaniline ternary nano composite material and preparation method thereof

Examples

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Effect test

Embodiment 1

[0031] Implementation example 1: Cobalt ferrite-graphene-polyaniline ternary nanocomposite material, the mass ratio of cobalt ferrite and graphene is 1%, the preparation method that polyaniline accounts for the mass fraction of total substance is about 90%, comprises the following steps:

[0032] The first step: ultrasonically disperse 3 mg of graphite oxide in ethanol for 30 min to obtain a graphene oxide solution;

[0033] In the second step, 0.1486 g of cobalt nitrate and 0.4126 g of ferric nitrate (molar ratio 1:2) were stirred and dissolved in ethanol;

[0034] The third step is to mix the solutions obtained in the first two steps, stir for 60 min, and adjust the pH value to 7;

[0035] The fourth step is to transfer the reaction system obtained in the third step to a hydrothermal kettle for reaction. The reaction temperature is 240 °C and the reaction time is 12 h to obtain a cobalt ferrite-graphene composite material. The mass of cobalt ferrite and graphene is The ra...

Embodiment 2

[0040] Implementation example 2: Cobalt ferrite-graphene-polyaniline ternary nanocomposite material, the mass ratio of cobalt ferrite and graphene is 10%, the preparation method that polyaniline accounts for the mass fraction of total substance is about 70%, comprises the following steps:

[0041] The first step: ultrasonically disperse 13 mg of graphite oxide in ethanol for 60 min to obtain a graphene oxide solution;

[0042] In the second step, 0.1486g of cobalt nitrate and 0.4126g of ferric nitrate (molar ratio 1:2) were stirred and dissolved in ethanol;

[0043] The third step is to mix the solutions obtained in the first two steps, stir for 30 minutes, and adjust the pH value to 8;

[0044] The fourth step is to transfer the reaction system obtained in the third step to a hydrothermal kettle for reaction, the reaction temperature is 200 ° C, and the reaction time is 16 h to obtain a cobalt ferrite-graphene composite material, wherein the mass of cobalt ferrite and graph...

Embodiment 3

[0049] Implementation example 3: Cobalt ferrite-graphene-polyaniline ternary nanocomposite material, the mass ratio of cobalt ferrite and graphene is 20%, the preparation method that polyaniline accounts for the mass fraction of total substance is about 60%, comprises the following steps:

[0050] The first step: ultrasonically disperse 40 mg of graphite oxide in ethanol for 90 min to obtain a graphene oxide solution;

[0051] In the second step, 0.1486g of cobalt nitrate and 0.4126g of ferric nitrate (molar ratio 1:2) were stirred and dissolved in ethanol;

[0052] The third step is to mix the solutions obtained in the first two steps, stir for 120 minutes, and adjust the pH value to 10;

[0053] The fourth step is to transfer the reaction system obtained in the third step to a hydrothermal kettle for reaction, the reaction temperature is 180 ° C, and the reaction time is 20 h to obtain a cobalt ferrite-graphene composite material, wherein the mass of cobalt ferrite and gra...

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Abstract

The invention discloses a cobalt ferrite-graphene-polyaniline ternary nano composite material and a preparation method thereof. The ternary nano composite material consists of nano cobalt ferrite, graphene and polyaniline, wherein the nano cobalt ferrite is loaded on a graphene sheet layer; the polyaniline is coated on the surface of the whole sheet layer. The preparation method for the cobalt ferrite- graphene-polyaniline ternary nano composite material comprises the steps of ultrasonically dispersing graphite oxide into absolute ethyl alcohol to obtain graphene oxide liquor; stirring and dissolving ferric nitrate and cobalt ferrite in alcohol; mixing the liquor obtained in the two steps, stirring and regulating a pH value; transferring a reaction system obtained in the third step into an hydrothermal kettle for reacting, and washing obtained products; dispersing products obtained in the fourth step and an initiator in acid liquor; under a constant-temperature state, adding aniline into the system obtained in the fifth step; reacting the obtained system under the constant-temperature condition; filtering the products obtained in the seventh step by using a lot of deionized water and separating out the products obtained in the seventh step, and drying to obtain the cobalt ferrite-graphene-polyaniline ternary nano composite material. The cobalt ferrite-graphene-polyaniline ternary nano composite material disclosed by the invention has excellent electrochemical performance, and is widely applied to the fields of catalytic materials, electrode materials, and the like.

Description

technical field [0001] The present invention first loads nano cobalt ferrite on the graphene sheet through hydrothermal reaction, and then prepares cobalt ferrite-graphene-polyaniline ternary nanocomposite material by in-situ oxidation polymerization method, the cobalt ferrite - Graphene-polyaniline ternary nanocomposites have excellent electrochemical activity, and have good application prospects and economic benefits in supercapacitors and other aspects. Background technique [0002] With the increasingly serious energy problem, the research on high-performance electrochemical energy storage devices becomes more and more important. Among them, supercapacitors have attracted special attention because of their high energy density, fast charge and discharge rate, and long service life. [0003] Generally speaking, supercapacitors are divided into electric double layer capacitors and pseudocapacitors. The electrode materials of electric double layer capacitors are mainly car...

Claims

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Application Information

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IPC IPC(8): C08L79/02C08K9/12C08K3/24C08G73/02H01G9/042
CPCY02E60/13C08K9/12C08G73/0266C08K3/24C08K2201/011C08L2203/20H01G11/30C08L79/02
Inventor 汪信熊攀付永胜黄华杰胡辰尧范晔孙敬文钱华玉张文耀徐斌海陈美
Owner NANJING UNIV OF SCI & TECH
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