One-step mechanical processing to prepare LSM/ScSZ composite particles for SOFC cathode

• Published in: Advanced powder technology : the international journal of the Society of Powder Technology, Japan Japan, 2014-09, Vol.25 (5), p.1430-1434
• Main Authors: Hosokawa, Kouhei, Kondo, Akira, Okumiya, Masataro, Abe, Hiroya, Naito, Makio
• Format: Article
• Language: English
• Subjects: Cathode; Composite particle; Mechanical synthesis; Solid oxide fuel cell (SOFC); Strontium doped lanthanum manganite
• ISSN: 0921-8831; 1568-5527
• DOI: 10.1016/j.apt.2013.12.006

[Display omitted] •One-step mechanical process was developed to prepare composites for SOFC cathode.•They consisted of strontium doped lanthanum manganite particles and electrolyte ones.•It was prepared by only 10min processing without extra-heat.•Polarization resistance of the resultant cathode was 0.5Ωcm2 at 800°C. Novel one-step mechanical processing was proposed to prepare LSM/ScSZ composite particles from the starting raw powders of LSM (strontium doped lanthanum manganite) and ScSZ (scandium stabilized zirconia) fine powder. In this paper, the properties of composite particles made by this method and the properties of the resultant cells were evaluated. As a result, LSM/ScSZ composite particles were obtained by only 10min mechanical processing using three kinds of raw powder materials of LSM and ScSZ fine particles without extra heat. The maximum power density of the cell made by the composite particles at 800°C reached 320mW/cm2. It was higher than that made by commercially available LSM nanosized powder. Besides, the polarization resistance of the cathode made by the composite particles at 800°C was 0.5Ωcm2 which was lower than that made by using commercially available LSM powder. It suggests that the proposed method is very promising for producing high quality composite particles used for SOFC cathodes by more simple and energy-saving way.