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Preparation method for flexible and bendable aluminum ion battery

An aluminum-ion battery, bending technology, applied in the direction of battery electrodes, secondary batteries, circuits, etc., can solve the problems of being unable to meet wearable portable devices, not having mass production characteristics, not being bendable, etc., and achieving fast charging and discharging characteristics, rapid charge and discharge performance, and the effect that is beneficial to adsorption

Active Publication Date: 2017-02-22
杭州德烯科技集团有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these cathode materials are complex to prepare, high in cost, do not have mass production characteristics and are not bendable, and cannot meet the requirements of wearable and portable devices.

Method used

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  • Preparation method for flexible and bendable aluminum ion battery
  • Preparation method for flexible and bendable aluminum ion battery
  • Preparation method for flexible and bendable aluminum ion battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] 1) Add 1 part by weight of graphene oxide to 1000 parts by weight of deionized water, and treat it in a 20Hz ultrasonic bath for 1 hour to obtain a concentration of 1 mg • mL -1 Graphene oxide dispersion;

[0030] 2) Extrude the graphene oxide dispersion liquid from a spinning head with a diameter of 100 microns into a rotating coagulation bath. The formula of the coagulation bath is: the volume ratio of ethanol to water is 3:1, and the mass fraction of calcium chloride is 5 %. The speed of the coagulation bath is 1000RPM;

[0031] 3) Collect the coagulation bath by filtering it with a filter screen, and the graphene oxide fibers (fiber length is 8-10 cm) in the coagulation bath are overlapped on the filter screen to form a graphene oxide cloth. Graphene oxide was dried at room temperature for 2 hours and then lyophilized, and then the lyophilized graphene oxide was placed in a 500mL airtight container, and 5mL of hydrazine hydrate aqueous solution with a concentratio...

Embodiment 2

[0036] 1) Add 5 parts by weight of graphene oxide to 1000 parts by weight of N,N-dimethylformamide, and treat it in a 50Hz ultrasonic bath for 0.5 hours to obtain a concentration of 5 mg·mL -1 Graphene oxide dispersion;

[0037] 2) The graphene oxide dispersion is extruded into a rotating coagulation bath through a spinning head with a diameter of 130 microns, and the coagulation bath is ethyl acetate solution. The rotation speed of the coagulation bath is 700RPM;

[0038]3) Collect the coagulation bath by filtering it with a filter screen, and the graphene oxide fibers (fiber length is about 10 cm) in the coagulation bath are overlapped on the filter screen to form a graphene oxide cloth. After the graphene oxide was dried at room temperature for 5 hours, it was dried in an oven at 60°C to remove the solvent. Arrange the dried graphene oxide in a nitrogen atmosphere, heat it to 2800°C in a graphitization furnace and keep it for one hour to obtain a graphene cloth with high ...

Embodiment 3

[0043] 1) Add 1 part by weight of graphene oxide and 1 part by weight of ammonium bicarbonate inorganic salt to 1000 parts by weight of deionized water, and treat it in a 20Hz ultrasonic bath for 1 hour to obtain a concentration of 1 mg·mL -1 Graphene oxide dispersion;

[0044] 2) Extrude the graphene oxide dispersion liquid from a spinning head with a diameter of 150 microns into a rotating coagulation bath. The formula of the coagulation bath is: the volume ratio of ethanol to water is 3:1, and the mass fraction of calcium chloride is 5 %. The speed of the coagulation bath is 1000RPM;

[0045] 3) Collect the coagulation bath by filtering it with a filter screen, and the graphene oxide fibers (fiber length is 8-10 cm) in the coagulation bath are overlapped on the filter screen to form a graphene oxide cloth. Arrange the graphene oxide at room temperature to dry for 2 hours and then freeze-dry, then arrange the freeze-dried graphene oxide in a 500mL airtight container, drop ...

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Abstract

The invention discloses a preparation method for a flexible and bendable aluminum ion battery. The preparation method comprises the steps of extruding graphene oxide or a graphene oxide inorganic salt mixed solution to rotary inorganic salt solution coagulating bath in spinning equipment with certain diameter; then filtering and collecting short fibers from the coagulating bath by a filtering net, and lapping joint the short fibers into graphene oxide cloth; reducing the obtained graphene oxide cloth in a reduction temperature to obtain graphene cloth; and then assembling the obtained graphene cloth positive electrode material, a diaphragm, a negative electrode, an electrolyte and a battery shell to obtain the aluminum ion battery taking the graphene cloth as the positive electrode material. The flexible and bendable aluminum ion battery is green, environment-friendly and low in cost, and suitable for continuous and controllable large-scale industrial production; under the premise of ensuring relatively high energy density, power density and cycle life of the aluminum ion battery, the flexibility and bendable property of the battery are realized; and the flexible and bendable aluminum ion battery is applicable to the field of high-safety wearable energy storage devices.

Description

technical field [0001] The invention relates to a preparation method of an aluminum ion battery using a flexible and bendable graphene cloth as a positive electrode material. Background technique [0002] With the advancement of science and technology, electronic devices such as smart phones and smart bracelets emerge in an endless stream, which also puts forward new requirements for their power source batteries. As a new type of secondary battery, lithium-ion batteries are becoming more and more popular due to their advantages such as small self-discharge and high mass-to-capacity. However, the low natural abundance of Li, flammability in air, and easy dendrite formation limit its application in everyday portable devices. The negative electrode material of aluminum ion battery is aluminum metal or alloy, and aluminum element is abundant in nature and can exist stably in the air. The above advantages make Al-ion batteries have broad application prospects in flexible and po...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/583H01M4/62H01M10/054C01B32/20
CPCH01M4/583H01M4/625H01M10/054Y02E60/10
Inventor 高超郭凡李拯
Owner 杭州德烯科技集团有限公司
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