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Aqueous zinc ion battery negative electrode material with functional protection layer and preparation method of aqueous zinc ion battery negative electrode material

A technology of zinc ion battery and negative electrode material, applied in battery electrodes, electrode manufacturing, secondary batteries, etc., can solve the problems of complex equipment and uneven protective layer, achieve uniform zinc electrodeposition, abundant raw materials, and promote rapid ion transport Effect

Pending Publication Date: 2022-07-29
ANHUI UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although these modification strategies all inhibit the dendrite growth on the surface of the zinc anode, the traditional coating methods are likely to cause uneven protective layers, and the equipment required for the atomic layer deposition method is relatively complicated.

Method used

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  • Aqueous zinc ion battery negative electrode material with functional protection layer and preparation method of aqueous zinc ion battery negative electrode material
  • Aqueous zinc ion battery negative electrode material with functional protection layer and preparation method of aqueous zinc ion battery negative electrode material
  • Aqueous zinc ion battery negative electrode material with functional protection layer and preparation method of aqueous zinc ion battery negative electrode material

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Embodiment 1

[0034] A method for preparing a negative electrode material for an aqueous zinc ion battery, specifically comprising the following steps:

[0035] 1) Pretreatment of zinc flakes: Cut multiple zinc flakes with a size of 2cm×1cm, soak them in dilute hydrochloric acid with a concentration of 0.3mol / L for 3 minutes, remove the surface oxide film, and use anhydrous ethanol and deionized water for the soaked zinc flakes. Repeated cleaning several times, dry in natural environment, spare.

[0036] 2) Prepare 100mL of 0.4M zinc sulfate heptahydrate (ZnSO 4 ·7H 2 O), 0.1M sodium phosphite (NaH 2 PO 2 ), 0.08M boric acid (H 3 BO 3 ), sodium sulfate (NaSO 4 ), 0.01M stannous chloride dihydrate (SnCl 2 ·2H 2 O), 0.006M sodium ethylenediaminetetraacetate (C 10 H 14N 2 Na 2 O 8 ) as the electroplating solution.

[0037] 3) Using the pretreated zinc sheet in step 1) as the working electrode, using AgCl as the reference electrode and Pt as the counter electrode, placing it in th...

Embodiment 2

[0041] A method for preparing a negative electrode material for an aqueous zinc ion battery, specifically comprising the following steps:

[0042] 1) Pretreatment of zinc flakes: Cut multiple zinc flakes with a size of 2cm×1cm, soak them in dilute hydrochloric acid with a concentration of 0.3mol / L for 3 minutes, remove the surface oxide film, and use anhydrous ethanol and deionized zinc flakes to remove the surface oxide film. Wash with water several times, dry in natural environment, and set aside.

[0043] 2) Prepare 100mL of 0.4M zinc sulfate heptahydrate (ZnSO 4 ·7H 2 O), 0.1M sodium phosphite (NaH 2 PO 2 ), 0.08M boric acid (H 3 BO 3 ), sodium sulfate (NaSO 4 ), 0.01M stannous chloride dihydrate (SnCl 2 ·2H 2 O), 0.006M sodium ethylenediaminetetraacetate (C 10 H 14 N 2 Na 2 O 8 ) as the electroplating solution.

[0044] 3) Using the pretreated zinc sheet in step 1) as the working electrode, using AgCl as the reference electrode and Pt as the counter electrod...

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Abstract

The invention belongs to the technical field of preparation of zinc ion battery electrode materials, and particularly relates to an aqueous zinc ion battery negative electrode material with a functional protection layer and a preparation method of the aqueous zinc ion battery negative electrode material. Zinc sulfate heptahydrate, sodium phosphite, stannous chloride dehydrate, boric acid, sodium sulfate, disodium ethylene diamine tetraacetate and deionized water are mixed to form an electroplating solution, and tin-doped zinc phosphide is uniformly deposited on a zinc sheet through an electrodeposition method to form the coating (Zn (at) Sn-ZnP). According to the invention, the Sn-ZnP functional protection layer is constructed on the surface of the metal zinc negative electrode, and P is inserted into a Zn lattice to form the ZnP protection layer through an economical and efficient electro-deposition method, so that the rapid transfer of Zn < 2 + > is facilitated, and the electrochemical reaction energy barrier in the Zn electroplating / stripping process is reduced; and meanwhile, the ZnSn alloy formed by electro-deposition can effectively inhibit the hydrogen evolution reaction of a zinc electrode and the generation of irreversible byproducts, so that the cycle life of the battery is prolonged.

Description

technical field [0001] The invention belongs to the technical field of preparation of electrode materials for zinc ion batteries, and in particular relates to a negative electrode material of an aqueous zinc ion battery with a functional protective layer and a preparation method thereof. Background technique [0002] With the rapid development of science and technology and the rapid progress of industry, the society consumes a lot of energy, and the exploitation and use of fossil energy destroys the ecological environment. Therefore, the needs of society have stimulated the enthusiasm of researchers to explore low-cost, high-energy-density and environmentally friendly renewable energy. In recent years, with the rapid development of electric vehicles and wearable electronic devices, lithium-ion batteries have been widely used. However, due to the limited and uneven distribution of lithium resources on the earth, the flammable and explosive organic electrolytes, and the low e...

Claims

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Application Information

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IPC IPC(8): H01M4/36H01M4/42H01M4/62H01M4/04H01M10/36
CPCH01M4/366H01M4/42H01M4/0452H01M4/628H01M10/36H01M2004/027
Inventor 秦清清李启文钱森森周文东李伟伟刘孝伟
Owner ANHUI UNIVERSITY OF TECHNOLOGY
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