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A kind of negative electrode of zinc-based battery and its preparation and application

A zinc-based battery, battery negative electrode technology, applied in battery electrodes, circuits, electrical components, etc., can solve the problems of reduced Coulomb efficiency and cycle life, limited rapid development, battery structure damage, etc., to achieve no impurity interference and achieve effective control , The effect of uniform and dense deposition

Active Publication Date: 2021-06-11
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, the metal zinc anode of zinc-based batteries has limited its rapid development, making its large-scale commercialization face great challenges.
The dissolution / deposition reaction of metal zinc on the negative electrode causes serious shape changes during the cycle, causing damage to the battery structure; rapid electrochemical crystallization of zinc on the negative electrode current collector will make the distribution of metal zinc on the current collector uneven. Even, the zinc dendrites grow rapidly and puncture the separator to make the battery invalid; repeated cycles form a loose structure and fall off during the cycle, resulting in a decrease in Coulombic efficiency and cycle life
Therefore, the regulation of the electrochemical crystallization behavior of metal zinc to make it deposited uniformly, densely and smoothly will be of great significance and extremely challenging.

Method used

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  • A kind of negative electrode of zinc-based battery and its preparation and application
  • A kind of negative electrode of zinc-based battery and its preparation and application
  • A kind of negative electrode of zinc-based battery and its preparation and application

Examples

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Effect test

Embodiment 1

[0037] Using the following steps to prepare:

[0038] (1) After the commercial carbon felt is washed with ethanol, acetone, and water, it is cleaned with ethanol, acetone, and water, as for 4 hours of vacuum ovens;

[0039] (2) The electrode substrate prepared by step (1) is on the sample table of the magnetron sputtering apparatus presented in advance, and the molecular pump draws the sputter main chamber to 1 × 10 by mechanical pump. -3 Pa; close the sample baffle, the sputter gas is argon, the flow control is 50sccm, the power is 10 W / cm 2 The pressure is maintained at 1 Pa, pre-sputtering for 10 minutes, after the glow and power is relatively stable, open the sample baffle, start sputtering to the electrode substrate, power control at 20W / cm 2 The sputtering gas is argon, and the flow control is at 50sccm, and the pressure is maintained at 1 Pa; and after the sputter is completed, the sample is taken out and can be used. Sputter thickness ~ 1 μm.

[0040] The carbon felt a...

Embodiment 2

[0043] Using the following steps to prepare:

[0044] (1) After the commercial carbon felt is washed with ethanol, acetone, and water, it is cleaned with ethanol, acetone, and water, as for 4 hours of vacuum ovens;

[0045] (2) The electrode substrate prepared by step (1) is on the sample table of the magnetron sputtering apparatus presented in advance, and the molecular pump draws the sputter main chamber to 1 × 10 by mechanical pump. -3 Pa; close the sample baffle, the sputter gas is argon, the flow control is 50sccm, the power is 10 W / cm 2 The pressure is maintained at 1 Pa, pre-sputtering for 10 minutes, after the glow and power is relatively stable, open the sample baffle, start sputtering to the electrode substrate, power control at 20W / cm 2 The sputtering gas is argon, and the flow control is at 50sccm, and the pressure is maintained at 1 Pa; and after the sputter is completed, the sample is taken out and can be used. The sputter thickness was ~ 5 nm.

[0046] The carbo...

Embodiment 3

[0049] Using the following steps to prepare:

[0050] (1) After the electrode substrate to be plated is washed with ethanol, acetone and water, as for vacuum oven 80 ° C, drying for 4 hours;

[0051] (2) The electrode substrate prepared by step (1) is on the sample table of the magnetron sputtering apparatus presented in advance, and the molecular pump draws the sputter main chamber to 1 × 10 by mechanical pump. -3 Pa; close the sample baffle, the sputter gas is argon, the flow control is 50sccm, the power is 10 W / cm 2 The pressure is maintained at 1 Pa, pre-sputtering for 10 minutes, after the glow and power is relatively stable, open the sample baffle, start sputtering to the electrode substrate, power control at 20W / cm 2 The sputtering gas is oxygen, and the flow control is at 50sccm, and the pressure is maintained at 1 Pa; and after the sputter is completed, the sample is taken out. The sputter thickness was ~ 1 μm.

[0052] The carbon felt after magnetron sputtering is us...

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Abstract

The invention relates to a negative electrode of a zinc-based battery and its preparation and application. One or more targets of metal, metal alloy, and metal oxide are deposited on an electrode substrate by magnetron sputtering to obtain a zinc-based battery negative electrode. Negative electrode of flow battery; by controlling the preparation conditions and the material composition of the electrode, it has a significant crystallization control function, excellent electronic conductivity, stable structure, and high specific surface area. It can be applied to aqueous and organic zinc-based batteries.

Description

Technical field [0001] The present invention relates to the technical field of zinc-based batteries, and more particularly to a zinc-based battery negative electrode. Background technique [0002] As people continue to increase, renewable energy production and utilization has a series of complex problems, which is equipped with large energy storage systems, which is considered to be practical solutions. At present, the market outlook of the energy storage power plant is broad. . However, more lithium batteries for power storage still have some security hazards, such as exploding, and safety issues for large-scale energy storage systems need to be resolved. [0003] Metal zinc has a negative electrode potential, two electron transfer reactions, high solubility, rapid kinetics, good circulating, rich reserves, and relatively cheap features, so that the zinc-based cell has normal temperature and normal pressure, no harmful Substance emissions, high safety, high energy conversion eff...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/90H01M4/88
CPCH01M4/8871H01M4/9041H01M4/9083H01M2004/8684Y02E60/50
Inventor 李先锋尹彦斌张华民
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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