Zinc-based battery anode material and preparation method thereof

A negative electrode material, technology of zinc-based battery, applied in battery electrodes, circuits, electrical components, etc., to achieve the effect of simple preparation method and inhibiting the phenomenon of dendrite growth piercing through the diaphragm

Inactive Publication Date: 2018-11-13
SHANGHAI UNIVERSITY OF ELECTRIC POWER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a zinc-based battery negative electrode material and its preparation method that can effectively solve the problem of negative electrode material dendrite growth in order to overcome the defects of the above-mentioned prior art

Method used

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  • Zinc-based battery anode material and preparation method thereof
  • Zinc-based battery anode material and preparation method thereof
  • Zinc-based battery anode material and preparation method thereof

Examples

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Effect test

Embodiment 1

[0030] A preparation method for a zinc ion secondary battery negative electrode material, comprising the steps of:

[0031] (1) Pretreatment of metal zinc: Cut a zinc sheet with a thickness of 0.3 mm into a disc with a diameter of 16 mm, place it in acetone, ultrasonically clean it for 30 minutes, and then wash it with absolute ethanol and deionized water in order to remove zinc Oil stains on the surface of the zinc sheet, then soaked in 1% hydrochloric acid for 10 seconds to remove the oxide layer on the surface of the zinc sheet, then rinsed with deionized water, and dried for later use;

[0032] (2) Preparation of graphene oxide solution: use 32-mesh flake graphite as raw material, use hummers to prepare graphite oxide, after centrifugal cleaning, collect graphite oxide in the centrifuge tube and freeze-dry, weigh 0.1g of graphite oxide after drying and add 1L to remove Ionized water, after stirring and ultrasonic stripping, a graphene oxide aqueous solution with uniform co...

Embodiment 3

[0046] (1) Pretreatment of metal zinc: Cut a zinc sheet with a thickness of 0.1 mm into a disc with a diameter of 15 mm, place it in acetone, ultrasonically clean it for 50 minutes, and then wash it with absolute ethanol and deionized water in order to remove zinc Oil stains on the surface of the zinc sheet, then soaked in 3% hydrochloric acid for 5 seconds to remove the oxide layer on the surface of the zinc sheet, then rinsed with deionized water, and dried for later use

[0047] (2) Preparation of graphene oxide solution: use 128-mesh flake graphite as raw material, use hummers to prepare graphite oxide, after centrifugal cleaning, collect graphite oxide in the centrifuge tube and freeze-dry, weigh 2 g of dried graphite oxide and add 1 L of deionized water, a graphene oxide aqueous solution with uniform color was obtained after stirring and ultrasonic stripping.

[0048] (3) Graphene oxide is reduced and adsorbed on the surface of the zinc sheet: put the pretreated zinc she...

Embodiment 4

[0052] (1) Pretreatment of metal zinc: Cut a zinc sheet with a thickness of 0.1 mm into a disc with a diameter of 15 mm, place it in acetone, clean it ultrasonically for 30 minutes, and then wash it with absolute ethanol and deionized water in order to remove zinc Oil stains on the surface of the zinc sheet, then soaked in 2% hydrochloric acid for 5 seconds to remove the oxide layer on the surface of the zinc sheet, then rinsed with deionized water, and dried for use

[0053] (2) Preparation of graphene oxide solution: use 128-mesh flake graphite as raw material, use hummers to prepare graphite oxide, after centrifugal cleaning, collect graphite oxide in the centrifuge tube and freeze-dry, weigh 3g of dried graphite oxide and add 1L deionized water, a graphene oxide aqueous solution with uniform color was obtained after stirring and ultrasonic stripping.

[0054] (3) Graphene oxide is reduced and adsorbed on the surface of the zinc sheet: put the pretreated zinc sheet into the...

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Abstract

The invention relates to a zinc-based battery anode material and a preparation method thereof. The anode material comprises a zinc base and graphene supported on the surface of the zinc base. The preparation method comprises the following steps: (1) carrying out surface treatment on the zinc base, and then putting the zinc base in dilute acid for removing a surface oxide layer for later use; (2) placing graphene oxide in water and ultrasonically dispersing to obtain a graphene oxide solution; (3) placing the treated zinc base in the graphene oxide solution for reaction, and then soaking in deionized water and electrolyte separately, so as to obtain the zinc-based battery anode material. Compared with the prior art, the anode material is stably cycled for 150 cycles in zinc sulphate electrolyte having current density of 0.2mA per square centimeter and 0.5mole per liter, thereby effectively suppressing the phenomenon that dendrites grow to pierce a membrane in a circulation process; andthe preparation method is simple, and is suitable for large-scale application.

Description

technical field [0001] The invention relates to the field of energy storage materials, in particular to a zinc-based battery negative electrode material and a preparation method thereof. Background technique [0002] Due to environmental pollution and energy shortage, new energy secondary batteries have become a focus of attention and research. Zinc-based battery is a very important energy storage device, because of the abundant reserves and high energy density of metal zinc, it occupies a large market share in traditional primary batteries. Aqueous zinc-ion batteries, zinc-air batteries and other secondary batteries have high energy density, less environmental pollution, and the battery technology is simpler than organic battery systems, and the price is low. At the same time, it can effectively avoid thermal runaway in existing commercial lithium batteries, etc. Security issues have received widespread attention. At present, aqueous zinc-ion batteries still have problems...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/42H01M4/62
CPCH01M4/42H01M4/625Y02E60/10
Inventor 刘海梅夏奥林徐群杰
Owner SHANGHAI UNIVERSITY OF ELECTRIC POWER
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