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Current collector structure

A current collector, electrode layer technology, applied in collectors/separators, electrochemical generators, chemical instruments and methods, etc., can solve problems such as increased resistance

Inactive Publication Date: 2011-01-19
PRAXAIR TECH INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, it overcomes the disadvantage of this structure: where the resistance increases as one tries to make such a current collector thin enough to minimize the resistance of molecular oxygen transport through the layer

Method used

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Embodiment Construction

[0016] see figure 1 and figure 2 , shows an electrochemical cell 1 incorporating a current collector structure according to the invention.

[0017] The electrochemical cell 1 has an electrolyte layer 10 formed from a ceramic that is an ion conductor at elevated temperatures, such as between about 400°C and 1000°C. When the electrochemical cell 1 is subjected to high temperature and a potential is applied to the opposing surfaces of the electrolyte layer 10, oxygen ions will conduct through the electrolyte to produce oxygen permeation or permeation. Thus, as is well known in the art, the electrochemical cell will be located in an insulating enclosure in which the electrochemical cell 1 will be heated and will be fed with an oxygen-containing stream 14 , and will discharge an oxygen permeate stream 16 from the electrochemical cell 1 .

[0018] In the illustrated embodiment, the electrochemical cell 1 is in tubular form. As indicated above, other configurations are possible,...

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Abstract

A current collector structure that is used to distribute an electrical potential to an electrode layer of an electrochemical cell. The electrochemical cell has an electrolyte layer adjacent the electrode layer for transport of oxygen ions. The current collector structure has a porous, electrically conductive layer located on the electrode layer. Additionally, at least one elongated strip-like layer formed of an electrically conductive material is located on the porous, electrically conductive layer, opposite the electrode and oriented in a lengthwise direction of the electrode layer.

Description

technical field [0001] The present invention relates to current collector structures for distributing electrical potential to electrode layers of electrochemical cells. More particularly, the present invention relates to current collector structures in which a porous conductive layer is on the electrode layer and one or more elongated strip-like layers of conductive material are on the porous conductive layer. Background technique [0002] Electrochemical cells are used to separate oxygen from an oxygen-containing feed. Separation purposes may be to concentrate oxygen or to remove oxygen from a feed for purification purposes. [0003] Electrochemical cells have an electrolyte layer to conduct oxygen ions, and the electrolyte layer is positioned between two electrode layers to apply a potential across the electrolyte. The electrode layers are porous and may have sublayers, while the electrolyte is a gas-tight dense layer. The resulting composite structure may be in the for...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M8/02
CPCC01B13/0255H01M8/0226B01D53/326B01D2256/12Y02E60/50H01M8/0215C01B13/0248H01M8/0236H01M8/0247H01M8/0243H01M8/0206Y02E60/525H01M8/0232H01M2008/1293
Inventor D·M·里德J·M·科尔普斯J·L·内夫J·A·莱恩
Owner PRAXAIR TECH INC
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