Featured Research

from universities, journals, and other organizations

Fuel cell innovation: Novel cathode material which has outstanding performance

Date:
August 13, 2013
Source:
Ulsan National Institute of Science and Technology (UNIST)
Summary:
Scientists have developed a novel cathode material which has outstanding performance and robust reliability even at the intermediate temperature range.

Prof. Guntae Kim.
Credit: UNIST

Research team of Ulsan National Institute of Science and Technology (UNIST), Georgia Institute of Technology, and Dong-Eui University developed a novel cathode material which has outstanding performance and robust reliability even at the intermediate temperature range.

As high power density devices, fuel cells can convert chemical energy directly into electric power very efficiently and environmentally friendly. Solid oxide fuel cells (SOFCs), based on an oxide ion conducting electrolyte, have several advantages over other types of fuel cells, including relatively inexpensive material costs, low sensitivity to impurities in the fuel, and high overall efficiency.

To make SOFC technology more affordable, the operating temperature must be further reduced so that substantially less expensive materials may be used for the cell components. Also there will be more choices of materials for other components with lower operating temperature.

However, at the low operating temperature, the problem is that the efficiency drop by the cathode is especially dramatic than the one due to the anode and/or electrolyte. It means that the cathode, as a key component of SOFC, contributes the most to the polarization loss during intermediate temperature operation. As a result, the development of feasible low temperature SOFCs requires the generation of highly efficient cathode materials.,

A UNIST research team tried to co-dope Sr and Fe and succeeded in yielding remarkable out-performance to present materials at lower operating temperature. The optimized composition has facilitated excellent oxygen reduction reaction and the novel structure has created pore channels that dramatically enhance oxygen ion diffusion and surface oxygen exchange while maintaining excellent compatibility and stability under operating conditions.

"The hardest part of this research was finding optimum composition of Sr and Fe for the best performance and robustness," said Prof. Kim. "Previously various researches trying to dope Sr to perovskite structure had been made by many other groups. But none of them was successful for the better performance at the low operating temperature."

The new material developed by the UNIST research team led by Prof. Guntae Kim, could be used at significantly low temperature SOFC with higher efficiency and solid reliability than the previously reported materials.

This new novel cathode material enables the fuel cell designers have more flexible choices on the materials of fuel cell components, which leads to the lower fuel cell cost and, finally, to the step closer to the highly efficient and reliable fuel cells.

This research was published in Scientific Reports on August 13. (Title: Highly Efficient and robust cathode materials for low-temperature solid fuel cells: PrBa0.5Sr0.5Co2-xFexO5+δ )


Story Source:

The above story is based on materials provided by Ulsan National Institute of Science and Technology (UNIST). The original article was written by Eunhee Song. Note: Materials may be edited for content and length.


Cite This Page:

Ulsan National Institute of Science and Technology (UNIST). "Fuel cell innovation: Novel cathode material which has outstanding performance." ScienceDaily. ScienceDaily, 13 August 2013. <www.sciencedaily.com/releases/2013/08/130813112305.htm>.
Ulsan National Institute of Science and Technology (UNIST). (2013, August 13). Fuel cell innovation: Novel cathode material which has outstanding performance. ScienceDaily. Retrieved September 1, 2014 from www.sciencedaily.com/releases/2013/08/130813112305.htm
Ulsan National Institute of Science and Technology (UNIST). "Fuel cell innovation: Novel cathode material which has outstanding performance." ScienceDaily. www.sciencedaily.com/releases/2013/08/130813112305.htm (accessed September 1, 2014).

Share This




More Matter & Energy News

Monday, September 1, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Australian Airlines Relax Phone Ban Too

Australian Airlines Relax Phone Ban Too

Reuters - Business Video Online (Aug. 26, 2014) Qantas and Virgin say passengers can use their smartphones and tablets throughout flights after a regulator relaxed a ban on electronic devices during take-off and landing. As Hayley Platt reports the move comes as the two domestic rivals are expected to post annual net losses later this week. Video provided by Reuters
Powered by NewsLook.com
Hurricane Marie Brings Big Waves to California Coast

Hurricane Marie Brings Big Waves to California Coast

Reuters - US Online Video (Aug. 26, 2014) Huge waves generated by Hurricane Marie hit the Southern California coast. Rough Cut (no reporter narration). Video provided by Reuters
Powered by NewsLook.com
Chinese Researchers Might Be Creating Supersonic Submarine

Chinese Researchers Might Be Creating Supersonic Submarine

Newsy (Aug. 26, 2014) Chinese researchers have expanded on Cold War-era tech and are closer to building a submarine that could reach the speed of sound. Video provided by Newsy
Powered by NewsLook.com
Breakingviews: India Coal Strained by Supreme Court Ruling

Breakingviews: India Coal Strained by Supreme Court Ruling

Reuters - Business Video Online (Aug. 26, 2014) An acute coal shortage is likely to be aggravated as India's supreme court declared government coal allocations illegal, says Breakingviews' Peter Thal Larsen. Video provided by Reuters
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:

Breaking News:
from the past week

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile: iPhone Android Web
Follow: Facebook Twitter Google+
Subscribe: RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins