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Preparation method of aluminum-ion battery positive electrode material

A technology of aluminum ion battery and positive electrode material, which is applied to battery electrodes, circuits, electrical components, etc., can solve the problems of aluminum ion battery not being practical, commercial development is not smooth, and rechargeable batteries cannot be used, so as to overcome the edge of graphite. Limited issues, excellent cycle stability, effect of low charge voltage

Active Publication Date: 2018-02-16
XIFENG 2D FUJIAN MATERIAL TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In fact, aluminum-ion batteries were discovered by researchers a long time ago, but they cannot be used for rechargeable batteries, so their commercial development is not smooth
There are three main reasons: first, the cycle life is poor; second, the charging speed is too slow and the capacity is low; third, its fatal disadvantage is that the aluminum ions in the electrolyte are unstable, and chemical reactions are easy to occur, which poses serious safety hazards. Hidden dangers, these weaknesses have kept aluminum-ion batteries from being practical

Method used

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  • Preparation method of aluminum-ion battery positive electrode material
  • Preparation method of aluminum-ion battery positive electrode material
  • Preparation method of aluminum-ion battery positive electrode material

Examples

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Effect test

Embodiment 1

[0034] refer to figure 1 , a kind of preparation method of aluminum ion battery cathode material, described method comprises the following steps:

[0035] S101, use Ar + The plasma etching method is used to process nickel foam, put the foam nickel into the plasma etching reactor, the selected power is 50w, and use Ar + The plasma treatment time is 10min;

[0036] S102, to Ar + The foamed nickel after plasma etching process is carried out surface pretreatment, foamed nickel is put into tube furnace, feeds Ar (flow rate is 500sccm) and H 2 (The flow rate is 200sccm), heated to 1000°C, and annealed for 20 minutes to clean the surface and remove surface oxides;

[0037] S103, grow graphene on the pretreated nickel foam surface by CVD, feed 10sccm flow methane into the tube furnace for reaction, the corresponding total gas flow volume fraction is 1.4%, and the reaction time is 10 minutes, then the sample is cooled rapidly To room temperature, the gas atmosphere is Ar (the flow...

Embodiment 2

[0046] refer to figure 1 , a preparation method of an ultra-stable aluminum ion battery cathode material, the method comprising the following steps:

[0047] S101, use Ar + The plasma etching method is used to process nickel foam, put the foam nickel into the plasma etching reactor, the selected power is 40w, and use Ar + The plasma treatment time is 10min, and nanopore bands are formed on the pore wall of nickel foam; then, the nickel foam is treated by chemical etching to further increase the size of nanopores, which is beneficial to AlCl 4 - Diffusion and penetration of anions in electrode materials.

[0048] S102, carry out surface pretreatment to the foamed nickel after etching process, put foamed nickel into the tube furnace, pass into Ar (flow rate is 400sccm) and H 2 (The flow rate is 200sccm), heated to 1000°C, and annealed for 30 minutes to clean the surface and remove surface oxides.

[0049] S103, grow graphene on the pretreated nickel foam surface by CVD, fee...

Embodiment 3

[0055] refer to figure 2 , a kind of preparation method of aluminum ion battery cathode material, described method comprises the following steps:

[0056] S101, surface pretreatment is carried out to nickel foam, nickel foam is put into tube furnace, feeds Ar (flow rate is 500sccm) and H 2 (The flow rate is 200sccm), heated to 1000°C, and annealed for 20 minutes to clean the surface and remove surface oxides;

[0057] S102, grow graphene on the pretreated nickel foam surface by CVD, feed 10sccm flow methane into the tube furnace for reaction, the corresponding total gas flow volume fraction is 1.4%, and the reaction time is 10 minutes, then the sample is cooled rapidly To room temperature, the gas atmosphere is Ar (the flow rate is 500sccm.) and H 2 (The flow rate is 200sccm.), the cooling rate is 300°C / min, forming a graphene / nickel foam structure;

[0058] S103, performing Ar on graphene / nickel foam + Plasma etching process, put graphene / nickel foam into plasma etching ...

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Abstract

The invention discloses a preparation method of an aluminum-ion battery positive electrode material. The method comprises the following steps of firstly, processing foamed nickel by an etching method;secondly, pre-processing a surface of the foamed nickel; thirdly, growing graphene on the surface of the foamed nickel to form a graphene / foamed nickel structure; fourthly, etching the graphene / foamed nickel; fifthly, coating a layer of PMMA solvent on a surface of the graphene / foamed nickel, and performing baking and film formation to obtain a PMMA / graphene / foamed nickel structure; sixthly, performing acid processing on the PMMA / graphene / foamed nickel, and dissolving the foamed nickel to obtain a PMMA / graphene structure; and finally, removing PMMA in the PMMA / graphene to obtain foam structure-based graphene. The synthesis of the aluminum-ion battery positive electrode material without a binding agent is achieved by chemical vapor deposition and an etching technology, the aluminum-ion battery positive electrode material has ultra-large capacity, relatively low charging voltage and excellent cycle stability, and the volume expansion of the material during the charge-discharge process is prevented.

Description

technical field [0001] The invention relates to the technical field of aluminum ion batteries, in particular to a preparation method of an anode material of an aluminum ion battery. Background technique [0002] In today's energy age, it is very important to develop energy storage devices with high energy density. Lithium-ion batteries (LIBs) are widely used in portable electronics and network storage due to their relatively high discharge voltage, energy density, and good power performance. However, because of its high cost and the lack of raw material lithium, it has prompted the emergence of new types of similar alternative products, such as aluminum-ion batteries). Compared with lithium-ion batteries, aluminum-ion batteries have the following characteristics: aluminum resources are abundant, cheap, and widely distributed. Aluminum-ion batteries have the advantages of safety, high performance, and low cost, so they have broad application prospects in large-scale electric...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/62
CPCH01M4/62H01M4/625H01M4/587Y02E60/10
Inventor 许志
Owner XIFENG 2D FUJIAN MATERIAL TECH CO LTD
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