Electricity isolator, manufacturing method and use thereof

A spacer and electrical insulation technology, applied in the direction of circuits, electrical components, battery pack components, etc., can solve the problems of low thermal stability, poor machining performance, low heat resistance, etc.

Inactive Publication Date: 2009-05-06
EVONIK DEGUSSA GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These materials are not currently used in commercial battery systems due to their poor machinability
[0008] Disadvantages of organic polyolefin separators are: relatively low heat resistance, significantly below 150°C, relatively low thermal stability, and less chemical stability in inorganic battery cells
[0011] In conclusion, at present, there are no suitable separator materials that can be used to cost-effectively produce wound-type inorganic high-power or high-energy batteries

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 11

[0065] Add 300 g of deionized water, 50 g of ethanol and 1.2 g of zirconium acetylacetonate into the beaker. Then add 280g Al in portions 2 o 3 (Alcoa's ct3000), and keep stirring. The suspension thus prepared was stirred for about 24 hours. Then add 150g zirconium sol (MEL company) and stir well. The sol can then be processed into a film.

Embodiment 12

[0067] Add 300 g of deionized water, 50 g of ethanol and 1.2 g of zirconium acetylacetonate into the beaker. Then add 280g Al in portions 2 o 3 (MR32 from Martinswerke) with constant agitation. The suspension thus prepared was stirred for about 24 hours. Then add 150 g of zirconium sol and stir well. The sol can then be processed into a film.

Embodiment 13

[0069] 70g of tetraethoxysilane was hydrolyzed with 20g of water, and then peptized with 20g of nitric acid (25%). The solution is stirred until it becomes clear, after addition of 70 g of amorphous silicic acid or amorphous silicon dioxide (Aerosil 90 from the company Degussa), it is stirred until the aggregates dissolve and the suspension is then ready for use.

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Abstract

The invention relates to an electrical spacer and a manufacturing method thereof. The electrical spacer is used for batteries and other devices. Electrodes are separated mutually to keep ionic conductivity. The spacer is preferably made of thin and porous insulating material, has high iron conductivity, good mechanical strength, and can withstand chemical substances and solvents used in a system (such as in the electrolyte of the battery) for a long time. The spacer completely separates a cathode and an anode in the battery. In addition, the spacer has continuous elasticity and moves in accordance with the system, such as the movement in an electrode array during the charging and the discharging processes. The problem can be solved by the spacer; the spacer comprises a plurality of holes; flat and flexible base material for a coating layer is arranged on the base material and in the base material; meanwhile, the base material is made of self-weaving or non-weaving non conductive glass or ceramic fiber or the combination of the conductive glass and the ceramic fiber; and the coating layer is a porous electrical isolation ceramic coating layer. The spacer is characterized in that the thickness of the spacer is less than 100 microns.

Description

technical field [0001] Electrical separators are separators used in batteries and other devices where it is necessary to separate electrodes from one another and, for example, maintain ionic conductivity. Background technique [0002] Separators are thin, porous insulating materials with high ionic conductivity, good mechanical strength, and long-term resistance to the chemicals and solvents used in the system, such as in the electrolyte of a battery. This separator should completely electrically isolate the cathode and anode in the battery. In addition, the separator must be durable and elastic, and must conform to the movements that occur in the system, such as those in the electrode stack during charging and discharging. [0003] Devices that use separators, such as battery cells, depend primarily on the separator for their useful life. It is desirable to develop a rechargeable battery having a lithium electrode (negative electrode). But commercially available spacers ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M2/14H01M2/16H01M50/403H01M50/434H01M50/437H01M50/449
CPCY02E60/12Y02E60/10
Inventor V·亨尼格C·海英G·霍佩尔
Owner EVONIK DEGUSSA GMBH
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