Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Alternative energy comes closer with advances in hydrogen fuel cell sealing technology

14.06.2007
Developing ceramic seal technology for solid oxide fuel cells

Solid Oxide Fuel Cells (SOFC) have attracted major interest from research and development communities as an alternative source of power, with commercial trials already under way. In these fuel cells electricity is generated via electro-chemical reactions using hydrogen based gas and oxygen as a fuel and oxidant, respectively.

Sealing these units is a critical technical issue that needs further work before they can be put into widespread commercial use. In particular the system chosen must exhibit good gas tightness, adhesion with adjoining components (electrolyte and connector), chemical compatibility, matching coefficient of thermal expansion and electrical insulation.

Recent work from researchers, Apichart Jinnapat, Sirithan Jiamsirilert and Sumittra Charojrochkul from Chulalongkorn University and Thailand's National Metals and Materials Technology Center, and published under AZojomo* (OARS)**, looked at ceramic adhesives and ceramic-glass composites. These materials were examined in terms of their chemical and thermal compatibilities with respect to potential use in SOFCs.

The researchers found that all materials tested displayed good compatibility with the yttria-stabilised zirconia (YSZ) electrolyte and 430 stainless steel interconnector system. In general glass-ceramic composite materials sealed better than ceramic adhesives. Their sealing properties were also found to be superior after being subjected to thermal cycling. The most promising sealing material was a 80/20 Pyrex glass/YSZ composite material which recorded a leakage rate as low as 2.41 x 10 -4 cm 3/min cm.

Dr. Ian Birkby | EurekAlert!
Further information:
http://www.azom.com/Details.asp"ArticleID=3834

More articles from Materials Sciences:

nachricht Novel sensors could enable smarter textiles
17.08.2018 | University of Delaware

nachricht Quantum material is promising 'ion conductor' for research, new technologies
17.08.2018 | Purdue University

All articles from Materials Sciences >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Color effects from transparent 3D-printed nanostructures

New design tool automatically creates nanostructure 3D-print templates for user-given colors
Scientists present work at prestigious SIGGRAPH conference

Most of the objects we see are colored by pigments, but using pigments has disadvantages: such colors can fade, industrial pigments are often toxic, and...

Im Focus: Unraveling the nature of 'whistlers' from space in the lab

A new study sheds light on how ultralow frequency radio waves and plasmas interact

Scientists at the University of California, Los Angeles present new research on a curious cosmic phenomenon known as "whistlers" -- very low frequency packets...

Im Focus: New interactive machine learning tool makes car designs more aerodynamic

Scientists develop first tool to use machine learning methods to compute flow around interactively designable 3D objects. Tool will be presented at this year’s prestigious SIGGRAPH conference.

When engineers or designers want to test the aerodynamic properties of the newly designed shape of a car, airplane, or other object, they would normally model...

Im Focus: Robots as 'pump attendants': TU Graz develops robot-controlled rapid charging system for e-vehicles

Researchers from TU Graz and their industry partners have unveiled a world first: the prototype of a robot-controlled, high-speed combined charging system (CCS) for electric vehicles that enables series charging of cars in various parking positions.

Global demand for electric vehicles is forecast to rise sharply: by 2025, the number of new vehicle registrations is expected to reach 25 million per year....

Im Focus: The “TRiC” to folding actin

Proteins must be folded correctly to fulfill their molecular functions in cells. Molecular assistants called chaperones help proteins exploit their inbuilt folding potential and reach the correct three-dimensional structure. Researchers at the Max Planck Institute of Biochemistry (MPIB) have demonstrated that actin, the most abundant protein in higher developed cells, does not have the inbuilt potential to fold and instead requires special assistance to fold into its active state. The chaperone TRiC uses a previously undescribed mechanism to perform actin folding. The study was recently published in the journal Cell.

Actin is the most abundant protein in highly developed cells and has diverse functions in processes like cell stabilization, cell division and muscle...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

VideoLinks
Industry & Economy
Event News

LaserForum 2018 deals with 3D production of components

17.08.2018 | Event News

Within reach of the Universe

08.08.2018 | Event News

A journey through the history of microscopy – new exhibition opens at the MDC

27.07.2018 | Event News

 
Latest News

Smallest transistor worldwide switches current with a single atom in solid electrolyte

17.08.2018 | Physics and Astronomy

Robots as Tools and Partners in Rehabilitation

17.08.2018 | Information Technology

Climate Impact Research in Hannover: Small Plants against Large Waves

17.08.2018 | Life Sciences

VideoLinks
Science & Research
Overview of more VideoLinks >>>