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Preparation method of multi-edge graphene and prepared aluminum ion battery

An aluminum ion battery and graphene technology, applied in graphene, battery electrodes, secondary batteries, etc., can solve the problems of high production cost and high energy consumption, and achieve the effect that is conducive to mass production

Inactive Publication Date: 2020-02-21
福建海峡石墨烯产业技术研究院有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The known and reported graphene preparation methods are all prepared at a high temperature of 1000°C, which consumes a lot of energy and produces high production costs.
Therefore, it is still a great challenge to prepare high-quality graphene as a cathode for rechargeable Al-ion batteries using low-energy methods.

Method used

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  • Preparation method of multi-edge graphene and prepared aluminum ion battery
  • Preparation method of multi-edge graphene and prepared aluminum ion battery
  • Preparation method of multi-edge graphene and prepared aluminum ion battery

Examples

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preparation example Construction

[0034] refer to figure 1 , figure 2 , a preparation method of multi-edge graphene, the preparation method steps are as follows:

[0035] S01, remove the oxide layer on the surface of the nickel particles and connect the nickel particles to each other, use the nickel particles as a three-dimensional template and catalyst, clean the commercially available nickel particles, put them into a quartz boat and put them into a horizontal tube furnace, and then Heating to 400-650°C under vacuum, then continuously feeding argon and hydrogen, annealing at a constant temperature for 10-20min, removing the oxide layer on the surface of the nickel particles and making the nickel particles connected to each other continuously, the size of the nickel particles is 200nm- 4000nm, in view of production cost and energy consumption considerations, the further preferred nickel particle size is 1-3um, the argon flow rate of the tube furnace is 600-800sccm, and the hydrogen flow rate is 70-100sccm; ...

Embodiment 1

[0042] A preparation method of multi-edge graphene, the preparation method steps are as follows:

[0043] S01, remove the oxide layer on the surface of the nickel particles and connect the nickel particles to each other: use 2um nickel particles as a three-dimensional template and catalyst, put the nickel particles into a quartz boat and put it into a horizontal tube furnace, and then heat it under vacuum to 600°C, then continuously feed 700sccm argon and 80sccm hydrogen, anneal at constant temperature for 15 minutes, remove the oxide layer on the surface of nickel particles and make the nickel particles connect to each other continuously;

[0044] S02. Grow graphene on the surface of nickel particles in sheets to form a nickel mesh structure covering graphene: 30sccm methane gas is passed into the reaction tube furnace, and the gas is continuously fed for 5min; Rapid cooling to room temperature at a rate of 200°C min-1 in an atmosphere of air and 80 sccm hydrogen;

[0045] S...

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Abstract

The invention discloses a preparation method of multi-edge graphene and an aluminum ion battery prepared by the method. The preparation method comprises the following steps of removing an oxide layeron surfaces of the nickel particles and connecting the nickel particles with each other; then growing graphene on the surfaces of the flaky nickel particles to form a nickel net structure covered withthe graphene; covering a layer of PMMA (polymethyl methacrylate) on the surface of the nickel net structure covered with the graphene to obtain a PMMA / graphene / nickel net structure; removing the metal nickel by using acid to obtain a PMMA / graphene structure sample; and finally, removing PMMA to obtain the multi-edge graphene. According to the preparation method disclosed by the invention, the nickel particles are used as the template and the catalyst to prepare the independent multi-edge graphene with improved energy density, excellent mechanical strength and excellent conductivity at low temperature through a chemical vapor deposition process, the multi-edge graphene is an excellent positive electrode material of the rechargeable aluminum ion battery; and the method realizes low energy consumption and low cost, large-scale mass production is facilitated, and the aluminum ion battery based on the multi-edge graphene has a wide working temperature range and high coulombic efficiency.

Description

technical field [0001] The invention relates to the technical fields of graphene electrode materials and aluminum ion batteries, in particular to a method for preparing multi-edge graphene and the prepared aluminum ion battery. Background technique [0002] In order to meet the urgent needs of the efficient large-scale energy storage industry, the development of advanced energy storage devices has always attracted much attention. Among the emerging batteries, lithium-ion batteries (LIBs) are still widely used despite their high cost, safety issues, and the scarcity of lithium metal resources in nature. On the other hand, aluminum-ion batteries (AIBs) may be ideal energy storage devices because of their high theoretical capacity, abundant resources, low cost, and safe aluminum anode. However, conventional aluminum-ion batteries (AIBs) suffer from short cycle life and low discharge voltage. These factors lead to aluminum-ion batteries (AIBs) still unable to compete with lith...

Claims

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Application Information

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IPC IPC(8): C01B32/186H01M4/587H01M10/054
CPCC01B32/186H01M4/587H01M10/054H01M2004/021H01M2004/028Y02E60/10
Inventor 鲁兵安
Owner 福建海峡石墨烯产业技术研究院有限公司
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