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Preparation method and application of a patterned ultralight flexible self-supporting zinc electrode

A zinc-supporting, patterning technology, applied in the direction of electrode manufacturing, active material electrodes, negative electrodes, etc., can solve the problems of limiting the cycle life of devices and increasing the quality of devices, so as to inhibit volume expansion and dendrite growth, facilitate penetration, and mechanical good performance effect

Active Publication Date: 2021-08-17
HUNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing flexible zinc anodes limit the cycle life of the device due to dendrite growth, corrosion, and uneven deposition / stripping of zinc during charge and discharge.
Current collectors and active material heterostructures used in existing zinc anodes also greatly increase device quality

Method used

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  • Preparation method and application of a patterned ultralight flexible self-supporting zinc electrode
  • Preparation method and application of a patterned ultralight flexible self-supporting zinc electrode
  • Preparation method and application of a patterned ultralight flexible self-supporting zinc electrode

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] (1) Place the conductive ITO glass in ethanol and deionized water for 10-15 minutes;

[0025] (2) Spin-coat Ruihong photoresist on the ITO conductive surface obtained in step (1), first spin-coat at 500rpm for 10s, and then spin-coat at 800rpm for 25s;

[0026] (3) Place the ITO obtained in step (2) on a constant temperature plate for drying, the temperature of the constant temperature plate is 75° C., and the drying time is 60 minutes;

[0027] (4) After patterning and exposing the photoresist on the ITO obtained in step (3) for 28 seconds, use 0.5% sodium hydroxide to dissolve and clean it for 40 seconds to make a hard template;

[0028] (5) 11.4%wt of zinc sulfate heptahydrate and 15.4%wt of sodium sulfate and 0.5%wt of boric acid solution are dissolved in deionized water of 72.7%wt, configured into electroplating solution;

[0029] (6) Place the hard template obtained in step (4) in the electroplating solution obtained in step (5) and apply 25mA*cm -2 The constant...

Embodiment 2

[0033] (1) Place the graphite plate successively in ethanol and deionized water for 10-15min;

[0034] (2) Spin-coat Ruihong photoresist on the graphite plate obtained in step (1), first spin-coat with 600rpm for 10s, and then spin-coat for 30s with 800rpm;

[0035] (3) Place the graphite plate obtained in step (2) on a constant temperature plate for drying, the temperature of the constant temperature plate is 70° C., and the drying time is 60 minutes;

[0036] (4) Patterning and exposing the photoresist on the graphite plate obtained in step (3) for 15 seconds and then using 0.5% sodium hydroxide to dissolve and clean it for 26 seconds to make a hard template;

[0037] (5) 11.4%wt of zinc sulfate heptahydrate and 15.4%wt of sodium sulfate and 0.5%wt of boric acid solution are dissolved in 72.7%wt of deionized water, configured into electroplating solution;

[0038] (6) Place the hard template obtained in step (4) in the electroplating solution obtained in step (5) and apply ...

Embodiment 3

[0042] (1) Place AZO successively in ethanol and deionized water for 10-15min;

[0043] (2) Spin-coat Ruihong photoresist on the AZO conductive surface obtained in step (1), the speed of the homogenizer is 800rpm, and the time is 60s;

[0044] (3) Place the AZO obtained in step (2) on a constant temperature plate for drying. The constant temperature plate is first baked at 50°C for 30 minutes, and then at 75°C for 60 minutes;

[0045] (4) Patterning and exposing the photoresist on the AZO obtained in step (3) for 50 s and then dissolving and cleaning with 0.5% sodium hydroxide for 60 s to make a hard template;

[0046] (5) 11.4%wt of zinc sulfate heptahydrate and 15%wt of sodium sulfate and 0.9%wt of boric acid solution are dissolved in deionized water of 72.7%wt, configured into electroplating solution;

[0047] (6) Place the hard template obtained in step (4) in the electroplating solution obtained in step (5) and apply 25mA*cm -2 The constant current is electroplated to m...

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Abstract

The invention discloses a method for preparing a patterned ultra-light flexible self-supporting zinc electrode and its application. The invention has the advantages of environmental friendliness, customizable patterns, no need to add conductive agents and binders, ultra-light and ultra-thin, self-supporting and The advantages of excellent mechanical properties. Compared with the existing flexible zinc-ion battery negative electrode, the flexible electrode obtained in the present invention is composed of a single-layer zinc grid that can be customized and patterned. The current collector and active material are both zinc metal, and the porous gap of the electrode can effectively inhibit charge and discharge. The volume expansion and dendrite growth caused by zinc deposition during the process are also conducive to the penetration of the electrolyte. The prepared flexible electrode can withstand repeated bending without breaking, and the electrochemical performance remains basically unchanged. It can be directly cut for battery assembly, which is convenient for the shape design and assembly of zinc-ion batteries.

Description

technical field [0001] The invention relates to the field of electrode preparation, in particular to an electrode preparation method and its application. Background technique [0002] With the rapid development of wearable electronic technology, higher requirements are placed on the thinness, flexibility, biosafety and cycle life of energy supply devices. Rechargeable aqueous zinc-ion batteries have the advantages of low cost, high operational safety, and environmental friendliness, and have obvious potential in the application of wearable devices. Due to its high theoretical capacity, relatively low redox potential, low cost, and good electrochemical stability in water, zinc metal is an ideal anode for aqueous zinc-ion batteries. [0003] At present, zinc anodes mostly use current collectors and active material heterogeneous structures. First, the current collectors are manufactured by photolithography, selective melting, etc. The materials are mostly carbon-based material...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/04H01M4/66H01M10/36
CPCH01M4/04H01M4/0452H01M4/661H01M10/36H01M2004/021H01M2004/027Y02E60/10
Inventor 张冠华李金昊段辉高胡晋
Owner HUNAN UNIV
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