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

A patterned and supported zinc technology, applied in electrode manufacturing, active material electrodes, negative electrodes, etc., can solve problems such as limiting device cycle life and increasing device quality, inhibiting volume expansion and dendrite growth, facilitating penetration, Excellent support

Active Publication Date: 2020-10-02
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 patterned ultra-flexible self-supporting zinc electrode
  • Preparation method and application of patterned ultra-flexible self-supporting zinc electrode
  • Preparation method and application of patterned ultra-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 preparation method and application of a patterned ultra-flexible self-supporting zinc electrode. The patterned ultra-flexible self-supporting zinc electrode has the advantages of being environment friendly, being capable of customizing patterns, not needing a conductive agent and a binder, being ultra-light, ultra-thin, being capable of achieving self-supporting and beingexcellent in mechanical property. Compared with an existing flexible zinc ion battery negative electrode, the obtained flexible electrode is composed of a customizable patterned single-layer zinc grid, a current collector and an active material are both zinc metal, and the pore-shaped gap of the electrode can effectively inhibit the volume expansion and dendritic crystal growth caused by zinc deposition in the charging and discharging process, and the permeation of an electrolyte is also facilitated. The prepared flexible electrode can bear the repeated bending without breakage, the electrochemical performance of the prepared flexible electrode is basically kept unchanged, the prepared flexible electrode can be directly cut and used for assembling a battery, and the appearance design andassembly of a zinc ion battery are facilitated.

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 Applications(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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