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Electric double-layer capacitor

一种电双层电容、电容的技术，应用在双层电容器、电解电容器、电容器等方向，能够解决EDL电容比能降低、比能不足够高、成本高等问题

Inactive Publication Date: 2004-08-04
AXION POWER INT
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, this capacitor has many disadvantages: 1) the specific energy is not high enough; and 2) the cost is high due to the use of a large amount of nickel oxide
For all these reasons, EDL capacitors have a fundamental disadvantage: they can decompress and even explode, requiring special maintenance
This results in a significant reduction in the specific energy of the EDL capacitance, which is proportional to the difference between the square of the initial and final discharge voltage

Method used

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Examples

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example 1

[0037] An electric double layer capacitor ( figure 1 ), comprising a negative electrode 5 in the form of 8 layers of activated carbon fibers of the TCA type, each layer having 1200m 2 / g specific surface area and 300 μm thickness; a 1-mm thick positive electrode 7 with an active mass comprising lead sulfate and lead dioxide pressed into an alloy comprising 94% lead and 5% antimony A Grace-type porous separator 6; a pressure shell 1 of the outer tube; an insulator 2 to prevent short circuits between capacitor electrodes; a current collector 3 made of iron sheets; a corrosion-resistant collector made of graphite flakes Electrical protection layer 4 ; acid-resistant sealing layer 8 ; and a pressure-resistant outer tube 9 .

[0038] According to chemical analysis, the active mass of the positive electrode in the discharged state contains 91.2% PbSO 4 and 4.6% PbO 2 , while in the charged state it contains 3.2% PbSO 4 and 92.8% PbO 2 . Therefore, the mass ratio of lead sulfat...

example 2

[0042] An electric double layer capacitor ( figure 2 ) and Example 1 ( figure 1 ) differs in that, in this case, two negative electrodes are used, each made of 4 layers of TCA-type activated carbon fibers (with 1200m 2 / g specific surface area and 300μm layer thickness), placed on both sides of the positive electrode and connected. The positive non-polarizable electrode 7 consists of a grid made of an alloy containing 94% lead and 5% antimony. A coating comprising 83% active mass and 17% Teflon was applied to the openings of the mesh. According to chemical analysis, the mass ratio of lead sulfate and lead dioxide at the device in the discharged state was 95.8%. In the fully charged state, this ratio is 5.6%, and in the 50% discharged state it is 45.1% (in this calculation, PbSO 4 and PbO 2 The total mass of is taken as 100%). A Grace type divider 5 is used. The current collector 3 is made of stainless steel sheet. The corrosion-resistant current collector protection l...

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Abstract

The present invention is directed to a novel capacitor. The capacitor may be used in electric double layer capacitors. The capacitors include a polarizable electrode including activated carbon and a non-polarizable electrode including lead dioxide and lead sulfate. The capacitors of the present invention provide considerably higher electric capacity, higher durability, and low resistance, while maintaining high conductivity. Additionally, the electrodes may be produced more quickly and inexpensively.

Description

technical field [0001] The present invention relates to electronic engineering, and more particularly to capacitance engineering, which can be used to manufacture high-capacity capacitors utilizing the energy of an electric double layer (EDL). EDL can be used in systems that require uninterrupted power supply, such as computers, communication equipment, digital programmable lathes, continuous production cycles, as a backup power supply; for electric starters of internal combustion engines, power supplies for wheelchair engines, golf carts, etc. Background technique [0002] As described in US Patent No. 4313084 and US Patent No. 4562511, several electrical energy storage devices exist in the form of electric double layer (EDL) capacitors. This capacitor consists of two porous, polarizable electrodes with a porous separator made of a dielectric material between the electrodes and the current collector. An anhydrous or aqueous liquid electrolyte comprising a solution of hydra...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/24H01G9/00H01G9/02
CPCH01G9/02H01G11/04H01G9/155H01G9/038H01G11/58Y02E60/13H01G11/24
Inventor 尤里·M·沃尔夫科维奇帕维尔·A·史玛特科
Owner AXION POWER INT
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