Method for removing conductive layer of titanium fuel cell separator

A fuel cell and conductive layer technology, applied to fuel cells, cleaning methods using liquids, cleaning methods and appliances, etc., can solve the problems of reduced recycling efficiency and reduced yield, and achieve high yields and suppress losses.
CN103165922BInactive Publication Date: 2016-06-01KOBE STEEL LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
KOBE STEEL LTD
Publication Date
2016-06-01
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention provides a method for removing a conductive layer containing a carbon conductive material from a Ti-made fuel battery separation plate while inhibit loss of a substrate that is Ti material. The Ti-made fuel battery separation plate of the invention comprises: a conductive layer which contains the carbon conductive material and is formed on the substrate made of pure titanium or titanium alloys, and an intermediate layer which contains titanium carbide and is formed between substrate and the conductive layer; and the method is used for removing the conductive layer from the Ti-made fuel battery separation plate. The method is characterized by dipping the Ti-made fuel battery separation plate in a water solution containing any one of nitric acid and hydrogen peroxide, or in a water solution containing both of nitric acid and hydrogen peroxide.
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Description

technical field

[0001] The present invention relates to a method for removing a conductive layer from a titanium fuel cell separator material coated with a conductive layer containing a carbon-based conductive material on a base material formed of pure titanium or titanium alloy . Background technique

[0002] As an energy source, a fuel cell that continuously extracts electricity by continuously supplying fuel such as hydrogen and an oxidant such as oxygen is expected. Unlike primary batteries such as dry batteries or secondary batteries such as lead storage batteries, they have high power generation efficiency and are hardly affected by the size of the system. In addition, since there is little noise and vibration, it can cover a variety of uses and scales. Specifically, fuel cells have developed solid polymer fuel cells (PEFC), alkaline electrolyte fuel cells (AFC), phosphoric acid fuel cells (PAFC), molten carbonate fuel cells (MCFC), solid oxide fuel cells type fuel c...

Claims

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