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Flexible silver oxide electrode, manufacturing method and application

A production method and silver oxide technology are applied in the field of flexible silver oxide electrodes, the positive electrode field of a new generation of power type, and special-shaped zinc-silver storage batteries, which can solve the problems of waste of silver powder active material, long production cycle, increased weight, etc.

Pending Publication Date: 2021-09-10
SHANGHAI INST OF SPACE POWER SOURCES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The silver oxide electrode produced by this method is characterized by good strength and regular size, but extremely poor flexibility, inability to bend, and inability to adapt to the space size design of special-shaped structures, which restricts the application range and field of zinc-silver storage batteries. At the same time, formation and washing are required. Long production cycle
In addition, for power-type silver electrodes, less active material is usually required to meet the index requirements. However, because the existing production method requires that the silver mesh cannot leak outside, the silver powder needs to be fully covered with the silver mesh, which not only wastes the silver powder active material, but also increases the production cost. unnecessary weight
[0003] In terms of flexible electrode production, such as "A Flexible Silver Electrode and Its Preparation Method" published by Chinese patent CN111349934A and CN101693135B "A Preparation Method of Flexible Medical Silver Electrode Material", both adopt chemical silver plating to prepare silver electrodes instead of oxidation. Silver electrode, and low efficiency, large environmental pollution

Method used

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  • Flexible silver oxide electrode, manufacturing method and application
  • Flexible silver oxide electrode, manufacturing method and application
  • Flexible silver oxide electrode, manufacturing method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] Example 1 80mm×80mm, single-sided coating thickness 0.02mm~0.04mm flexible silver oxide electrode production

[0054] Select a roll of silver foil with a width of 100mm×0.05mm and a purity of 99.5%, soak it in a 50% alcohol tank for 4 hours, then rinse it with deionized water, dry it in an oven at 50°C±3°C, and set it aside; Using an electronic scale with a sensitivity better than or equal to 0.01g, weigh 1.000kg of the solute PVDFHSV900 type polyvinylidene fluoride with a purity of 99.6%, put it into a stirring container, and then weigh the analytically pure, 95% pure N-methyl Put 12.000kg of pyrrolidone into a stirring container, turn on the stirring container, set the heating temperature to 40°C, set the stirring rate to 130 rpm, and set the stirring time to 5h to make a binder; the binder is calculated as 13.000kg, and then Take by weighing 99.5% of purity and 7.222kg of analytically pure silver oxide powder according to the mass ratio relationship between silver ...

Embodiment 2

[0059] Example 2 80mm × 80mm, double-sided coating thickness 0.05mm ~ 0.07mm flexible silver oxide electrode production

[0060] Prepare the ready-to-use flexible silver oxide tape from Example 1, coat the uncoated surface of the silver foil completely according to Example 1, and measure the thickness after coating and drying (drying temperature 90°C) to meet the requirements, that is, Flexible silver oxide electrode tape coating production can be carried out. The blank size of the silver foil coating is used as the cutting electrode tab, and the coated flexible silver oxide electrode strip is cut according to 80mm×80mm to become the desired flexible silver oxide electrode. The electrode can be used in laminated sheets or coiled.

[0061] The thickness measurement result of the above-mentioned cut silver oxide electrode with a digital display micrometer is 0.107mm, and the weighing result with an electronic scale is 5.294g, minus the weight of the silver foil substrate 8cm×...

Embodiment 3

[0063] Example 3 70mm × 500mm, single-side coating thickness 0.02mm ~ 0.04mm flexible silver oxide electrode production

[0064] Select a roll of silver foil with a width of 100mm×0.05mm and a purity of 99.9%, soak it in an 80% alcohol tank for 8 hours, then rinse it with deionized water, dry it in an oven at 50°C±3°C, and set it aside; Using an electronic scale with a sensitivity better than or equal to 0.01g, weigh 1.000kg of the solute PVDFHSV900 type polyvinylidene fluoride with a purity of 99.9%, put it into a stirring container, and then weigh the analytically pure, 99% pure N-methyl Put 12.000kg of pyrrolidone into a stirring container, turn on the stirring container, set the heating temperature to 50°C, set the stirring rate to 170 rpm, and set the stirring time to 10h to make a binder; the binder is calculated as 13.000kg, and then Take by weighing 99.8% of purity and 7.222kg of analytically pure silver oxide powder according to the mass ratio of silver oxide powder...

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Abstract

The invention provides a flexible silver oxide electrode, a manufacturing method and application. The manufacturing method comprises the following steps: 1, weighing a solute polyvinylidene fluoride (PVDF) and a solvent N-methyl pyrrolidone (NMP) according to a ratio, and preparing a binder; 2, weighing silver oxide powder, and adding the silver oxide powder into the binder according to a specified proportion to prepare silver oxide slurry; and 3, coating a silver foil serving as a current collector with the silver oxide slurry, drying, and cutting to prepare the flexible silver oxide electrode. According to the manufacturing method, the flexible silver oxide electrode which is high in flexibility, thin and free of formation can be manufactured, the flexible silver oxide electrode is very suitable for being used as the positive electrode of a power type and special-shaped structure zinc-silver reserve battery, and the positive electrode design of the zinc-silver reserve battery for a new generation of weapons is facilitated.

Description

technical field [0001] The invention belongs to the technical field of electrochemical energy storage materials, and in particular relates to a flexible silver oxide electrode, a manufacturing method and an application thereof, and is suitable for a positive electrode of a new generation of power-type, heterogeneous structure (irregular structure) zinc-silver storage battery. Background technique [0002] The silver oxide electrode made by the existing method is to flatten the silver powder on the silver grid, and then press, sinter, chemically form, clean, and dry to become a silver oxide electrode. The specific process is as follows: figure 1 shown. The silver oxide electrode produced by this method is characterized by good strength and regular size, but extremely poor flexibility, inability to bend, and inability to adapt to the space size design of special-shaped structures, which restricts the application range and field of zinc-silver storage batteries. At the same tim...

Claims

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Application Information

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IPC IPC(8): H01M4/08H01M4/06H01M4/66H01M6/36
CPCH01M4/08H01M4/06H01M4/661H01M6/36
Inventor 郭兆瑞沈川杰雷刚张懋慧葛伟梁一林
Owner SHANGHAI INST OF SPACE POWER SOURCES
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