Performance and long-term durability of nanostructured Ni anodes doped with transition metals prepared by spray mist dryer

K. Araki, J. Yamamoto, Y. Shiratori, K. Ito, K. Sasaki

Research output: Chapter in Book/Report/Conference proceedingConference contribution

4 Citations (Scopus)

Abstract

Various additives for Ni anodes mixed with scandium stabilized zirconia (ScSZ) prepared by spray mist dryer are examined for SOFCs in order to improve their anodic activity and long-term durability. Among the additives examined, it is found that the addition of Mn was highly effective to improve anode activity and sulfur tolerance. In case 5 mol% Mn was added to Ni, at 800°C and 200 mA/cm2 for 50% pre-reformed CH4 fuels (S/C = 2.5), the anodic overvoltage was as low as 18 mV and the initial cell voltage drop by 5 ppm H2S was ca. 30 m V, which was less than half of the initial cell voltage drop for undoped Ni-cermet anodes. Mn-oxide reacts with NiO during preparation, while Ni metal nanoparticles will be segregated after reduction and Mn-oxide acts as pinning sites to depress grain growth and agglomeration of Ni particles, leading to lower anodic overvoltage and higher sulfur tolerance. Long-term durability up to 3000 hours has been verified.

Original languageEnglish
Title of host publicationECS Transactions - Solid Oxide Fuel Cells 11 (SOFC-XI)
Pages2039-2048
Number of pages10
Edition2 PART 3
DOIs
Publication statusPublished - Dec 1 2009
Event11th International Symposium on Solid Oxide Fuel Cells (SOFC-XI)- 216th ECS Meeting - Vienna, Austria
Duration: Oct 4 2009Oct 9 2009

Publication series

NameECS Transactions
Number2 PART 3
Volume25
ISSN (Print)1938-5862
ISSN (Electronic)1938-6737

Other

Other11th International Symposium on Solid Oxide Fuel Cells (SOFC-XI)- 216th ECS Meeting
Country/TerritoryAustria
CityVienna
Period10/4/0910/9/09

All Science Journal Classification (ASJC) codes

  • Engineering(all)

Fingerprint

Dive into the research topics of 'Performance and long-term durability of nanostructured Ni anodes doped with transition metals prepared by spray mist dryer'. Together they form a unique fingerprint.

Cite this