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Fuel cell separator

A fuel cell and separator technology, which is applied to fuel cells, fuel cell components, solid electrolyte fuel cells, etc., can solve the problem of high cost and achieve the effect of low contact resistance

Inactive Publication Date: 2013-10-30
KOBE STEEL LTD
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0006] As a conductive and corrosion-resistant coating material, there are noble metals or noble metal alloys such as Au and Pt, but the cost becomes high

Method used

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Embodiment

[0063] 〔Preparation of test materials〕

[0064] As the base material, JIS 1 class, pure titanium with a chemical composition of O: 450ppm, Fe: 250ppm, N: 40ppm, C: 350ppm, and the balance of Ti and unavoidable impurities is applied, and known dissolution, casting, and hot rolling are performed. , Cold rolling, made into a base material with a plate thickness of 0.12mm.

[0065] Graphite particles with an average particle diameter of 10 μm and a purity of 4N were dispersed in a 1% by mass aqueous solution of carboxymethylcellulose at a predetermined concentration to prepare a slurry. Then, without removing the surface layer by pickling after cold rolling, etc., the slurry was applied to both sides of each test material (substrate) with varying coating amounts, and allowed to dry naturally. Then, with regard to the base material, the roll gap was adjusted so that the rolling reduction per pass was constant, and cold rolling was performed in multiple passes with rolls not coated...

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Abstract

Provided is a fuel cell separator that can maintain a low contact resistance for a long period of time while being used for a fuel cell, by using a carbon film that can be formed with high productivity. The fuel cell separator 10 is provided with: a substrate 1 comprising titanium or titanium alloy; and a conductive carbon layer 2 that is formed by compression bonding carbon powder onto the substrate 1, and covers the surface thereof. Between the substrate 1 and the carbon layer 2, particle-like titanium carbide 31 and carbon dissolved titanium 32 generated by reacting the titanium of the substrate 1 and carbon of the carbon layer 2 with each other through heat treatment are connected, forming an intermediate layer 3.

Description

technical field [0001] The present invention relates to a fuel cell separator using titanium as a base material used in fuel cells. Background technique [0002] Unlike primary batteries such as dry batteries and secondary batteries such as lead-acid batteries, fuel cells that can continuously generate electricity by continuously supplying fuel such as hydrogen and oxidants such as oxygen have high power generation efficiency and are hardly affected by the size of the system. , There is also less vibration, so it is expected to be used as an energy source covering various purposes and scales. Fuel cells are specifically referred to as solid polymer fuel cells (PEFC), alkaline electrolyte fuel cells (AFC), phosphoric acid fuel cells (PAFC), molten carbonate fuel cells (MCFC), solid oxide fuel cells (SOFC), biofuel cells, etc. are being developed. In particular, solid polymer fuel cells are being developed as portable devices for fuel cell vehicles, household cogeneration sy...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M8/02H01M8/10
CPCH01M2008/1095H01M8/0228H01M8/0213Y02E60/50H01M8/0206H01M8/10H01M8/02
Inventor 高田悟铃木顺佐藤俊树
Owner KOBE STEEL LTD
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