Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:


Success in developing groundbreaking electrolyte materials

Success in developing groundbreaking electrolyte materials
Researchers at National Institute for Materials Science (NIMS) have successfully developed two types of novel proton conducting oxide electrolytes for SOFCs, moving towards the commercialization of SOFCs.

Fuel Cell Nano-Materials Group (Leader: Enrico TRAVERSA), International Center for Materials Nanoarchitectonics (Director: Masakazu AONO) has successfully developed two types of novel proton conducting oxide electrolytes for solid oxide fuel cells (SOFCs). By applying these electrolytes, the commercialization of SOFCs operating in the intermediate temperature range, 500 to 650¡ÆC, has come into sight.

SOFCs are environmental-friendly and efficient energy production devices. Reducing the operating temperature of SOFCs below 700¡ÆC is needed for a wide practical application of these devices. Yttrium-doped barium zirconate (BZY) is now considered as an alternative to the oxygen-ion conductor electrolytes conventionally used in SOFCs due to its higher bulk proton conductivity at low temperatures. BZY has not been exploited until now despite its excellent chemical stability because, when prepared as a ceramic polycrystalline material, it suffers from difficult sintering and proton conductivity is decreased by grain boundaries, which have a blocking effect.

Fuel Cell Nano-Materials Group has successfully developed two types of novel materials which satisfy all the three requirements for electrolyte: ion conductivity, chemical stability and sinterability, at high levels.

... more about:
»BZY »Nano-Materials »NiO-BZY »SOFC »cell death

One is yttrium-doped barium zirconate with 10 mol% of praseodymium (BZPY). The addition of Pr improves the sinterability of BZY and dense samples are obtained after sintering at 1500¡ÆC for 8 hours. This material showed very high proton conductivity (above 0.01S/cm at 600¢ªC), comparable to the proton conductivity of BCZY, now proposed for proton conductor electrolyte, but with significantly better chemical stability, thereby resulting in realistic applicability in fuel cell devices.

The other material is indium-doped barium zirconate (BZI) on a NiO-BZY anode substrate. During sintering at 1450oC, a dense electrolyte film is formed and simultaneously indium evaporates, being substituted by yttrium. The final result is the achievement of a dense BZY electrolyte film on a NiO-BZY anode, which cannot be obtained at the same temperature with direct processing. The fuel cells using this electrolyte film showed the largest fuel cell performance, 0.169 W/cm2 at 600oC, ever reported for BZY-based electrolytes. The BZY film made by this method shows excellent chemical stability, indicating its potential for long-term operation.

These two materials are promising electrolyte materials for SOFC operating in the intermediate temperature range, 500 to 650¡ÆC, which allows reducing SOFC fabrication and operation costs, and thus accelerating their commercialization. The previous work of the group, published in Nature Materials on September 20th, introduced high-performance materials that show very high proton conductivity at even lower temperatures, but it was fabricated by using a special technology called pulsed laser deposition. In these new studies, high-performance electrolyte materials were obtained by simple co-pressing and subsequent sintering in the air, which is suitable for mass-production. This indicates the aforementioned results could accelerate the commercialization of SOFCs.

Mikiko Tanifuji | Research Asia Research News
Further information:

Further reports about: BZY Nano-Materials NiO-BZY SOFC cell death

More articles from Materials Sciences:

nachricht Scientists have a new way to gauge the growth of nanowires
19.03.2018 | DOE/Argonne National Laboratory

nachricht Researchers demonstrate existence of new form of electronic matter
15.03.2018 | University of Illinois at Urbana-Champaign

All articles from Materials Sciences >>>

The most recent press releases about innovation >>>

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

Im Focus: Tiny implants for cells are functional in vivo

For the first time, an interdisciplinary team from the University of Basel has succeeded in integrating artificial organelles into the cells of live zebrafish embryos. This innovative approach using artificial organelles as cellular implants offers new potential in treating a range of diseases, as the authors report in an article published in Nature Communications.

In the cells of higher organisms, organelles such as the nucleus or mitochondria perform a range of complex functions necessary for life. In the networks of...

Im Focus: Locomotion control with photopigments

Researchers from Göttingen University discover additional function of opsins

Animal photoreceptors capture light with photopigments. Researchers from the University of Göttingen have now discovered that these photopigments fulfill an...

Im Focus: Surveying the Arctic: Tracking down carbon particles

Researchers embark on aerial campaign over Northeast Greenland

On 15 March, the AWI research aeroplane Polar 5 will depart for Greenland. Concentrating on the furthest northeast region of the island, an international team...

Im Focus: Unique Insights into the Antarctic Ice Shelf System

Data collected on ocean-ice interactions in the little-researched regions of the far south

The world’s second-largest ice shelf was the destination for a Polarstern expedition that ended in Punta Arenas, Chile on 14th March 2018. Oceanographers from...

Im Focus: ILA 2018: Laser alternative to hexavalent chromium coating

At the 2018 ILA Berlin Air Show from April 25–29, the Fraunhofer Institute for Laser Technology ILT is showcasing extreme high-speed Laser Material Deposition (EHLA): A video documents how for metal components that are highly loaded, EHLA has already proved itself as an alternative to hard chrome plating, which is now allowed only under special conditions.

When the EU restricted the use of hexavalent chromium compounds to special applications requiring authorization, the move prompted a rethink in the surface...

All Focus news of the innovation-report >>>



Industry & Economy
Event News

Virtual reality conference comes to Reutlingen

19.03.2018 | Event News

Ultrafast Wireless and Chip Design at the DATE Conference in Dresden

16.03.2018 | Event News

International Tinnitus Conference of the Tinnitus Research Initiative in Regensburg

13.03.2018 | Event News

Latest News

A new kind of quantum bits in two dimensions

19.03.2018 | Physics and Astronomy

Scientists have a new way to gauge the growth of nanowires

19.03.2018 | Materials Sciences

Virtual reality conference comes to Reutlingen

19.03.2018 | Event News

Science & Research
Overview of more VideoLinks >>>