Environment-friendly aqueous battery and preparation method thereof

An environmentally friendly, water-based electrolyte technology, which is applied to battery pack components, circuits, electrical components, etc., can solve problems such as poor water resistance, poor insulation, and short life, and achieve poor water resistance and maintenance. The effect of deformation and strength increase

Active Publication Date: 2022-04-15
池州精研新能源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In the prior art, there are many reports on the positive electrode materials of aqueous batteries, but most of the separators still use the separators of existing ion batteries. There are two main types of separators used, one is the insulating film material represented by polyimide , which has good insulation, can effectively separate the positive and negative electrodes, and prevent the internal short circuit of the battery, but the water resistance is not good, and the service life is not long when used in water-based batteries. The other type is olefin film, which has good water resistance. However, its insulation is not good, and there is a great risk of short circuit, especially when it is hit or squeezed, the battery will fail due to the puncture of the diaphragm.

Method used

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  • Environment-friendly aqueous battery and preparation method thereof
  • Environment-friendly aqueous battery and preparation method thereof
  • Environment-friendly aqueous battery and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] In this example, a hydrophobic reinforced diaphragm is prepared, and the specific implementation process is as follows:

[0029] Step A1: Weigh 200g of nano-silica, measure 800mL of ethanol aqueous solution with a volume concentration of 10%, add nano-silica to the ethanol solution, ultrasonically disperse at 28kHz for 10min to form a suspension, and then let it stand at room temperature Soak for 30 minutes, so that a large amount of silicon hydroxyl groups are formed on the surface, and then the reaction solution is suction-filtered, and the filter cake is stirred and dried after suction filtration, and the water content of the filter cake is controlled below 20%, so as to obtain pretreated nano-silica;

[0030] Step A2: Measure 24mL of perfluorooctyltrichlorosilane and 200mL of isopropanol, add the perfluorooctyltrichlorosilane dropwise into the isopropanol, stir and mix, and weigh 200g of the pretreated nanometer dichlorosilane prepared in step A1. Silicon oxide, the...

Embodiment 2

[0034] In this example, a hydrophobic reinforced diaphragm is prepared, and the specific implementation process is as follows:

[0035] Step A1: Weigh 200g of nano-silica, measure 1L of ethanol aqueous solution with a volume concentration of 10%, add nano-silica to the ethanol solution, ultrasonically disperse at 28kHz for 15min to form a suspension, and then let it stand at room temperature Soak for 50 minutes, so that a large amount of silicon hydroxyl groups are formed on the surface, and then the reaction solution is suction-filtered, and the filter cake is stirred and dried after suction filtration, and the water content of the filter cake is controlled below 20%, so as to obtain pretreated nano-silica;

[0036] Step A2: Measure 34mL of perfluorooctyltrichlorosilane and 220mL of isopropanol, add the perfluorooctyltrichlorosilane dropwise into the isopropanol, stir and mix, and weigh 200g of the pretreated nanometer dichlorosilane prepared in step A1. Silicon oxide, the mi...

Embodiment 3

[0055] In this example, a zinc water-based battery is prepared by using the hydrophobic reinforced diaphragm prepared in Example 2. The specific implementation process is as follows:

[0056] Positive grid: use the known molybdenum trioxide coil, the coil thickness is 40μm;

[0057] Negative grid: choose zinc foil, the thickness of zinc foil is 45μm, and the purity of zinc foil is >99.9%;

[0058] Aqueous electrolyte: zinc trifluoromethanesulfonate electrolyte (commercially available)

[0059] The positive grid, the negative grid, the hydrophobic reinforced separator prepared in Example 2, and the water-based electrolyte were assembled into the casing by adopting the roll-core battery structure to obtain a zinc water-based battery.

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Abstract

The invention relates to an environment-friendly aqueous battery and a preparation method thereof, and belongs to the technical field of aqueous batteries. The hydrophobic reinforced diaphragm taking polyimide as a base material is adopted in the battery, and fluorinated nano silicon dioxide is added into the diaphragm to serve as a reinforcing filler, so that the strength of the diaphragm material is improved, the diaphragm is prevented from being punctured, and the battery is ensured to still operate after being impacted or extruded by the outside, and the diaphragm is endowed with good hydrophobicity by a fluorine-containing group, so that the service life of the battery is prolonged. The diaphragm is not easy to infiltrate by the electrolyte, so that the problem of poor water resistance of the polyimide base material is solved, the contact angle between the diaphragm and the aqueous electrolyte is over 125 degrees through testing, and the diaphragm can be stably applied to an aqueous battery; the diaphragm is prepared by adopting two-step electrostatic spinning, fluorinated nano silicon dioxide is dispersed in a prepolymer to prepare a spinning solution, a membrane material is prepared by virtue of electrostatic spinning, and finally, a staggered three-dimensional network structure coated with nano silicon dioxide is formed by virtue of heating imidization reaction and has fine and high-strength pores, and the pore structure is maintained to be not deformed.

Description

technical field [0001] The invention belongs to the technical field of water-based batteries, and in particular relates to an environment-friendly water-based battery and a preparation method thereof. Background technique [0002] With the advancement of science and technology and the development of society, fossil energy is becoming increasingly exhausted and environmental pollution is becoming more and more serious. Therefore, energy issues have become a key issue related to the sustainable development of the world. The huge pressure on energy and the environment has made it an urgent task for mankind to find and develop new green and renewable energy sources. The tremendous development of smart grids and renewable energy technologies (including solar energy, wind energy, new clean energy internal combustion engines, fuel cell technology, etc.) More requirements are put forward for secondary energy storage technology. However, whether it is distributed energy storage or c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M50/403H01M50/414H01M50/423
CPCH01M50/423H01M50/414H01M50/403Y02P70/50
Inventor 吴田元吴小强董书胜
Owner 池州精研新能源科技有限公司
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