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Method for modifying negative electrode of aqueous zinc ion battery

A zinc-ion battery and water-based technology, applied in battery electrodes, electrode manufacturing, chemical electrode manufacturing, etc., can solve problems such as battery short circuit, safety issues, and restrictions on the development and application of zinc-ion batteries, and achieve extended cycle life and single conditions. control, good electrochemical cycle stability

Pending Publication Date: 2022-05-17
XUZHOU NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

A large number of zinc dendrites will be generated on the electrode surface during the charge and discharge process of the zinc foil negative electrode. These zinc dendrites will pierce the separator during the cycle and cause internal short circuit of the battery, and even cause safety problems, which greatly limit the further development of zinc ion batteries. Development and Application

Method used

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  • Method for modifying negative electrode of aqueous zinc ion battery
  • Method for modifying negative electrode of aqueous zinc ion battery
  • Method for modifying negative electrode of aqueous zinc ion battery

Examples

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Embodiment 1

[0026] A method for modifying the negative pole of an aqueous zinc-ion battery, comprising the following steps:

[0027] (1) Polish the zinc foil sequentially with 1200#, 2500#, 4000# and 7000# sandpaper, then wash it with deionized water and absolute ethanol for 3 to 6 times, and then set it aside;

[0028] (2) Preparation of assembly solution: 0.1 mmol of n-dodecyl mercaptan (DT) was dissolved in 100 mL of absolute ethanol to form an alkyl mercaptan-ethanol assembly solution with a concentration of 0.001 mol / L;

[0029] (3) Deoxygenate the assembly solution before use. The deoxygenation process is: use high-purity argon to deoxygenate the assembly solution for 30 minutes. The entire assembly process is always protected by argon, so that the assembly is carried out in an oxygen-free environment;

[0030] (4) Soak the polished and leveled zinc foil in the assembly solution for 2 hours to form a self-assembled film on the surface of the zinc foil, then take out the zinc sheet a...

Embodiment 2

[0035] A method for modifying the negative pole of an aqueous zinc-ion battery, comprising the following steps:

[0036] (1) Polish the zinc foil sequentially with 1200#, 2500#, 4000# and 7000# sandpaper, then wash it with deionized water and absolute ethanol for 3 to 6 times, and then set it aside;

[0037] (2) Preparation of assembly solution: 0.1 mmol of salicylidene-2-aminopyridine (HL) was dissolved in 100 mL of absolute ethanol to form an alkylthiol-ethanol assembly solution with a concentration of 0.001 mol / L;

[0038] (3) Deoxygenate the assembly solution before use. The deoxygenation process is: use high-purity argon to deoxygenate the assembly solution for 30 minutes. The entire assembly process is always protected by argon, so that the assembly is carried out in an oxygen-free environment;

[0039] (4) Soak the polished and leveled zinc foil in the assembly solution for 2 hours to form a self-assembled film on the surface of the zinc foil, then take out the zinc she...

Embodiment 3

[0043] A method for modifying the negative pole of an aqueous zinc-ion battery, comprising the following steps:

[0044] (1) Polish the zinc foil sequentially with 1200#, 2500#, 4000# and 7000# sandpaper, then wash it with deionized water and absolute ethanol for 3 to 6 times, and then set it aside;

[0045](2) Preparation of assembly solution: 0.1 mmol of n-dodecyl mercaptan (DT) and salicylidene-2-aminopyridine (HL) were respectively dissolved in 100 mL of absolute ethanol to form a concentration of 0.001 mol / L Alkylthiol-ethanol assembly solution and Schiff bases-ethanol assembly solution;

[0046] (3) Deoxygenate the assembly solution before use. The deoxygenation process is: use high-purity argon to deoxygenate the assembly solution for 30 minutes. The entire assembly process is always protected by argon, so that the assembly is carried out in an oxygen-free environment;

[0047] (4) Soak the polished zinc foil in the alkylthiol-ethanol assembly solution for 1 h, then ta...

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Abstract

The invention discloses a method for modifying a water-based zinc ion battery negative electrode, which comprises the following steps: soaking a polished and flattened zinc foil in an assembly solution to form a self-assembly film layer on the surface of the zinc foil to obtain the modified water-based zinc ion battery negative electrode, the preparation method of the assembly solution comprises the following steps: respectively dissolving an alkyl mercaptan organic matter or a Schiff base organic matter in absolute ethyl alcohol to form an alkyl mercaptan-ethyl alcohol assembly solution or a Schiff base-ethyl alcohol assembly solution. The method for modifying the self-assembled film on the surface of the zinc foil is simple in preparation process operation, single and controllable in condition and easy to realize large-scale production; the alkyl mercaptan organic matter molecules and the Schiff base organic matter molecules can generate a chemical adsorption effect with the zinc surface, and a compact and ordered molecular film capable of inhibiting zinc dendritic crystal growth is formed on the zinc surface; when the zinc / self-assembled membrane composite negative electrode prepared by the method is applied to a zinc ion battery, zinc ion electrons have good electrochemical cycle stability.

Description

technical field [0001] The invention relates to the technical field of water system zinc ion batteries, in particular to a method for modifying the negative electrode of water system zinc ion batteries. Background technique [0002] Due to the environmental pollution and energy crisis brought about by traditional energy storage technologies, people's demand for high-energy density, low-cost environment-friendly grid energy storage equipment continues to increase, which promotes the rapid development of various energy storage systems. Lithium-ion batteries are widely used in commercial energy storage devices due to their high efficiency, high voltage, and long cycle life. However, the large-scale application of lithium-ion batteries has been seriously hindered due to the shortage of lithium resources, high cost, and poor safety of organic electrolytes. As an emerging and promising alternative energy storage technology, aqueous zinc-ion battery is due to its abundant natural ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/04H01M4/62
CPCH01M4/04H01M4/049H01M4/628Y02P70/50
Inventor 王庆红任凯欣肖清华赖超王超
Owner XUZHOU NORMAL UNIVERSITY