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A kind of diaphragm for zinc ion battery and preparation method thereof

A zinc ion battery and separator technology, applied in secondary batteries, battery pack parts, circuits, etc., can solve the problem that the physical indicators and electrochemical performance of zinc ion batteries cannot be significantly improved, the safety of the separator is not high, the puncture resistance strength, Problems such as poor liquid retention, to achieve the effect of improving liquid retention and puncture resistance, improving electrochemical performance, and improving liquid retention

Active Publication Date: 2021-07-23
SHENZHEN CITY THROUGH SCI & TECH OF NEW ENERGY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the separators on the market are not high in safety, have poor properties such as puncture resistance and liquid retention, and cannot significantly improve the physical indicators and electrochemical performance of zinc-ion batteries.

Method used

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  • A kind of diaphragm for zinc ion battery and preparation method thereof
  • A kind of diaphragm for zinc ion battery and preparation method thereof
  • A kind of diaphragm for zinc ion battery and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0032] This embodiment provides a diaphragm for a zinc ion battery, comprising a diaphragm base and coating layers arranged on the two surfaces of the diaphragm base, the diaphragm base is an adsorption glass fiber mat type diaphragm (AGM diaphragm), and the coating layer is an oxide aluminum layer.

[0033] The single-sided coating thickness of the alumina slurry on the surface of the AGM diaphragm is controlled at 4 μm, the thickness of the AGM diaphragm is 0.5 mm, and the weight of the AGM diaphragm is increased by 20.5% after the alumina slurry is coated. The particle diameter of alumina is 300-400 nm.

[0034] The preparation method of the separator for the zinc ion battery at least comprises the following steps:

[0035] The first step: the preparation of oxide slurry, add 5% alumina, 3% binder, 0.8% surfactant, 0.6% thickener, 0.3% dispersant, 2% defoamer and 88.1% solvent In the high-speed dispersing equipment tank, start the mixer while adding and stir to obtain uni...

Embodiment 2

[0042] This embodiment provides a diaphragm for a zinc ion battery, comprising a diaphragm base and coating layers arranged on the two surfaces of the diaphragm base, the diaphragm base is an adsorption glass fiber mat type diaphragm (AGM diaphragm), and the coating layer is an oxide aluminum layer.

[0043] The single-sided coating thickness of the alumina slurry on the surface of the AGM diaphragm is controlled at 3 μm, the thickness of the AGM diaphragm is 0.6 mm, and the weight of the AGM diaphragm is increased by 22.5% after the alumina slurry is coated. The particle diameter of alumina is 500-700 nm.

[0044] The preparation method of the separator for the zinc ion battery at least comprises the following steps:

[0045] The first step: the preparation of oxide slurry, add 10% alumina, 5% binder, 1.0% surfactant, 0.8% thickener, 0.6% dispersant, 3% defoamer and 79.6% solvent In the high-speed dispersing equipment tank, start the mixer while adding and stir to obtain a ...

Embodiment 3

[0049] This embodiment provides a diaphragm for a zinc ion battery, comprising a diaphragm base and coating layers arranged on the two surfaces of the diaphragm base, the diaphragm base is an adsorption glass fiber mat type diaphragm (AGM diaphragm), and the coating layer is an oxide zirconium layer.

[0050] The single-side coating thickness of the zirconia slurry on the surface of the AGM diaphragm is controlled at 2 μm, and the thickness of the AGM diaphragm is 0.4 mm. After the zirconia slurry is coated on the AGM diaphragm, the weight increases by 18.3%. The particle diameter of zirconia is 200-400 nm.

[0051] The preparation method of the separator for the zinc ion battery at least comprises the following steps:

[0052] The first step: the preparation of oxide slurry, add 19% zirconia, 3% binder, 0.7% surfactant, 0.7% thickener, 0.3% dispersant, 1.5% defoamer and 74.8% solvent In the high-speed dispersing equipment tank, start the mixer to stir while adding, and obta...

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Abstract

The invention belongs to the technical field of zinc ion batteries, and in particular relates to a diaphragm for zinc ion batteries, comprising a diaphragm base and a coating layer arranged on at least one surface of the diaphragm base, the diaphragm base is an adsorption glass fiber mat type diaphragm, the The coating layer is an oxide layer. Compared with the prior art, the diaphragm of the invention has the advantages of high safety, puncture resistance, high liquid retention and high porosity. In addition, the invention also discloses a preparation method of the diaphragm.

Description

technical field [0001] The invention belongs to the technical field of zinc ion batteries, and in particular relates to a separator for zinc ion batteries and a preparation method thereof. Background technique [0002] In the traditional battery system, primary batteries are easy to cause waste of resources, and lead-acid batteries are easy to cause regional lead pollution. The shortage of resources and the urgent need for environmental protection have prompted people to vigorously develop green and environmentally friendly new battery systems with high specific energy. In secondary batteries, rechargeable zinc-ion aqueous batteries can provide higher storage capacity for batteries because of their zinc ions with divalent charges, and also have high power, high safety, rich raw material resources, and no environmental pollution, etc. It is considered to be an ideal new green battery system, which has excellent application value and development prospects in the field of energ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M50/431H01M50/437H01M50/44H01M50/403H01M50/449H01M10/36
CPCH01M10/36H01M50/403H01M50/431H01M50/44H01M50/449Y02E60/10
Inventor 魏春光王静霞梁燕
Owner SHENZHEN CITY THROUGH SCI & TECH OF NEW ENERGY CO LTD
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