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Preparation method of graphene/nickel-aluminum bi-metal hydroxide composite material and application thereof

A hydroxide and composite material technology, applied in the field of electrochemistry, can solve the problems of poor dispersibility of composite materials, large layers of nickel-aluminum bimetallic hydroxides, serious agglomeration of graphene, etc., and achieve good conductivity and electronic conductivity. excellent effect

Active Publication Date: 2012-06-13
SHANDONG XINGQIANG CHEM IND TECH RES INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The object of the present invention is to aim at the severe environmental pollution, incomplete reduction of graphene oxide, serious graphene agglomeration, large nickel-aluminum double hydroxide layer, Insufficiency of poor dispersion of composite materials, providing a new preparation method of graphene / nickel-aluminum double metal hydroxide composites

Method used

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  • Preparation method of graphene/nickel-aluminum bi-metal hydroxide composite material and application thereof
  • Preparation method of graphene/nickel-aluminum bi-metal hydroxide composite material and application thereof

Examples

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Effect test

Embodiment 1

[0028] Put 1600mg of urea into a 500mL beaker, add 800mg of graphite oxide and 320g of deionized water, place the beaker into an ultrasonic generator and ultrasonically shake for 15 minutes, filter under reduced pressure, collect the filter cake with a water content of 10%, and then place the filter cake Into the microwave oven for 30 seconds to produce 480mg graphene; 480mg graphene is put into the tube furnace, and Ar and H 2 The mixed gas with a volume ratio of 1:1 was heated to 900°C, kept for 20 minutes, and then cooled to room temperature to obtain 460mg of deeply reduced graphene; 100mg of graphene was put into the autoclave, and 500mg of nickel nitrate, 500mg aluminum nitrate, 20000mg deionized water, 20mL pentaerythritol oleate and 800mg urea, tighten the sealing cap of the autoclave, heat up to 130℃, and keep it for 12 hours, take it out, cool to room temperature, filter, and collect 750mg graphene / nickel Aluminum bimetallic hydroxide; 10mg graphene / nickel aluminum bim...

Embodiment 2

[0030] Put 1600mg of ammonium bicarbonate into a 500mL beaker, add 800mg of graphite oxide and 220g of deionized water, place the beaker into an ultrasonic generator and ultrasonically shake for 18 minutes, filter under reduced pressure, collect the filter cake with 8% water content, and then filter The cake is placed in a microwave oven under microwave irradiation for 35 seconds to obtain 470 mg of graphene; 470 mg of graphene is placed in a tube furnace, and Ar and H are introduced 2 The mixed gas with a volume ratio of 2:1 was heated to 960°C, kept for 30 minutes, and then cooled to room temperature to obtain 450mg of deeply reduced graphene; 100mg of graphene was put into the autoclave, and 800mg of nickel nitrate, 400mg aluminum nitrate, 30000mg deionized water, 30mL pentaerythritol oleate and 1200mg urea, tighten the sealing cap of the autoclave, heat up to 150℃, and keep for 18 hours, take it out, cool to room temperature, filter, collect 900mg graphene / nickel Aluminum bi...

Embodiment 3

[0032] Put 1000mg of urea into a 500mL beaker, add 800mg of graphite oxide and 250g of deionized water, place the beaker into an ultrasonic generator and ultrasonically shake for 20 minutes, filter under reduced pressure, collect a filter cake with a water content of 10%, and then place the filter cake Into a microwave oven for 40 seconds of microwave radiation, 490mg graphene is prepared; 490mg graphene is placed in a tube furnace, and Ar and H are introduced 2 The mixed gas with a volume ratio of 1:1 was heated to 1000°C, held for 50 minutes, and then cooled to room temperature to obtain 450mg of deeply reduced graphene; 100mg of graphene was put into the autoclave, and 400mg of aluminum nitrate, 600mg nickel nitrate, 36000mg deionized water, 30mL trimethylol pentane oleate and 600mg ammonium chloride, tighten the sealing cap of the autoclave, heat up to 200℃ and keep it for 15 hours, take it out, cool to room temperature, and filter , Collect 800mg graphene / nickel-aluminum do...

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Abstract

The invention discloses a preparation method of a graphene / nickel-aluminum bi-metal hydroxide composite material and an application thereof, belonging to the technical field of electrochemistry. The preparation method comprises the following steps of: preparing a mixed solution by a stripping enhancer, oxidized graphene and deionized water, dispersing the mixed solution by ultrasonic wave; decompressing and filtering the mixed solution to obtain a filtering cake, and arranging the filtering cake into a household microwave oven to radiate; placing a graphene filtering cake into a tubular furnace, charging Ar / H2 mixed gas, and executing high-temperature thermal cracking; and adding an alkali source compound, nickel and aluminum salt precursors, a medium regulating agent and the deionized water to prepare a reactant mixing solution, and transferring the reactant mixing solution to a high-pressure reaction kettle to carry out a hydrothermal reaction, and finally obtaining the graphene / nickel-aluminum bi-metal hydroxide composite material. According to the preparation method of the graphene / nickel-aluminum bi-metal hydroxide composite material, disclosed by the invention, toxic chemical agents are not used at two steps of reduction of the graphene, thus damage on the health of a human body and environmental pollution because a large number of harmful chemical agents such as hydrazine hydrate and the like are taken as a strong reducing agent in a chemical reduction method can be eliminated fundamentally.

Description

Technical field [0001] The invention provides a preparation method and application of a graphene / nickel-aluminum double metal hydroxide composite material and belongs to the technical field of electrochemistry. Background technique [0002] Supercapacitor is a new type of energy storage device developed in the 1970s and 1980s. It is a power source with special performance between traditional capacitors and batteries. It mainly relies on electric double layers and redox pseudo-capacitors to store electrical energy. . The outstanding advantages of supercapacitors are its high power density, short charge and discharge time, long cycle life, and wide operating temperature range. With the rise of environmentally friendly electric vehicle research, electrochemical capacitors are used in conjunction with lead-acid batteries and other batteries to form composite batteries, which are used in the power starting system of electric vehicles to protect the battery during the vehicle’s starti...

Claims

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Application Information

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IPC IPC(8): H01G9/042
CPCY02E60/13
Inventor 李在均牛玉莲罗丹黄路顾志国
Owner SHANDONG XINGQIANG CHEM IND TECH RES INST CO LTD
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