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A kind of graphene-aluminum ion super battery and preparation method thereof

A super battery, graphene technology, applied in the direction of electrolyte battery manufacturing, battery electrodes, secondary batteries, etc., can solve the problems of low cost, limitation and low yield of chemical redox method, and achieve ultra-long charge-discharge cycle capability , Improve the rate performance, the effect of fast charge and discharge

Active Publication Date: 2020-08-14
赵红林
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Other factors that limit the application of graphene electrodes include: the technical scheme of graphene as an electrode has not been effectively studied
At present, the battery electrode scheme of the University of California, Los Angeles is to explore the combination of high-capacity nanomaterials, such as nano-silicon, sulfur, etc., and porous graphene. In fact, graphene is mainly used as the carrier as the nano-Nb2O5 electrode to improve the mass ratio discharge capacity. , does not really use graphene as an electrode material; there is no effective large-scale preparation of high-quality graphene. First, mechanical exfoliation can obtain high-quality graphene, but its yield is too low, and the size and thickness are not easy Controlled, cannot be prepared on a large scale
Second, the chemical redox method has low cost and high yield, but there are different degrees of defects in the graphene structure prepared by it.
Third; high-quality graphene films can be obtained by chemical vapor deposition, but limited by the currently used equipment and graphene transfer methods, large-scale production of large-scale graphene films cannot be produced

Method used

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  • A kind of graphene-aluminum ion super battery and preparation method thereof
  • A kind of graphene-aluminum ion super battery and preparation method thereof
  • A kind of graphene-aluminum ion super battery and preparation method thereof

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Embodiment 1

[0036] This embodiment provides a kind of graphene-aluminum ion super battery, with the aluminum or the aluminum alloy infiltration of gallium indium tin eutectic alloy as battery anode, with three-dimensional microporous structure graphene as battery cathode (such as figure 1 shown), and using (NH 2 ) 2 CO / AlCl 3 type ionic liquid as electrolyte. The performance comparison between its graphene battery and other energy devices such as figure 2 shown.

[0037] The charging and discharging chemical reaction principle of graphene-aluminum ion super battery is as follows:

[0038] On the anode side, metallic Al and AlCl 4 - A redox reaction occurs to generate Al 2 Cl 7 - and output charge from an external circuit;

[0039] On the cathode side, AlCl embedded between the graphene layers 4 - released into the electrolyte.

[0040] The battery charging process is the reverse process of the above reaction, and its redox reaction equation is shown in the following formula:

...

Embodiment 2

[0054] This embodiment provides a kind of graphene-aluminum ion super cell manufacturing method;

[0055] Step 1. Prepare aluminum or aluminum alloy impregnated with gallium indium tin eutectic alloy as the anode electrode of graphene-aluminum ion super battery

[0056] Step 1.1. Soak the aluminum wire in a mixture of concentrated sulfuric acid, nitric acid and phosphoric acid to remove the oxide layer on the surface.

[0057] Step 1.2, the aluminum is repeatedly rinsed with deionized water to remove the aluminum compound and residual acid formed on the surface.

[0058] Step 1.3. In a sealed container, completely immerse the aluminum wire in the gallium indium tin eutectic alloy with a low melting point, vacuumize it, and then fill it with argon to keep the container in an oxygen-free and anhydrous state, and let it stand for a while After that, it can be used as battery anode.

[0059] In this step, the liquid metal is an alloy composed of gallium, indium and tin, the mass...

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Abstract

The invention discloses a graphene-aluminum ion super battery. The super battery uses aluminum or aluminum alloy impregnated with gallium indium tin eutectic alloy as the anode of the battery, and graphene with a three-dimensional microporous structure as the cathode of the battery, and adopts ( NH 2 ) 2 CO / AlCl 3 type ionic liquid as electrolyte. At the same time, the invention also discloses a method for preparing a graphene-aluminum ion super battery, which ultimately achieves low-cost, industrialized preparation with high capacity, high energy density, high power density, fast charge and discharge (second charge and second discharge) ), and the goal of an aluminum-ion super battery with ultra-long stable charge-discharge cycle capability (millions of times).

Description

technical field [0001] The invention relates to a high-performance graphene-aluminum ion primary super battery, which has the characteristics of high energy density and high power density and can be quickly charged and discharged, and belongs to electric vehicles, electromagnetic catapults, space technology, smart grids and distributed energy systems, etc. application field. Background technique [0002] At present, the most successful industrialized battery anode material is graphite, but its theoretical capacity is only 373mAh / g, which is difficult to meet the requirements of high energy density and high power in fields such as electric vehicles, electromagnetic catapults, future space technology, smart grids, and distributed energy systems. Density battery needs. Lithium-ion batteries have been industrialized for more than 20 years. In terms of energy density, commercial lithium-ion batteries can reach 100-150Wh / kg, while lead-acid and nickel-cadmium batteries are only 2...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/38H01M4/46H01M10/054H01M10/0568H01M10/058
CPCH01M4/387H01M4/463H01M10/054H01M10/0568H01M10/058Y02E60/10Y02P70/50
Inventor 赵希芝
Owner 赵红林