Nano-scale LSM-YSZ composite electrodes are prepared from a mixture of yttria stabilized zirconia (YSZ) and strontium-doped lanthanum manganite (LSM) particles. Commercial YSZ particles are mixed with polymerizable complex method-driven LSM powders of two different particle sizes, namely, 81 and 210 nm. Then, the correlations between the properties of the starting particles, sintering temperature, microstructure and cell performance are studied. Use of smaller LSM particles in the composite electrode induces extensive grain growth. This significantly reduces the triple phase boundary (TPB) and leads to an increase in the polarization resistance. The composite cathode derived from larger LSM particles exhibits a lower total polarization resistance (∼0.31 Ω cm2 at 800 °C) and, subsequently, better maximum cell power (∼630 mA cm-2). By contrast, larger resistance and lower cell power are observed for electrodes composed of smaller LSM particles.
Bibliographical noteFunding Information:
This work was supported by the Core Technology Development Program for the Fuel Cell of Ministry of Commerce, Industry, and Energy and the Korea Institute of Science and Technology Evaluation and Planning. It was also partially supported by the Korea Science and Engineering Foundation (KOSEF) through the National Research Lab. Program funded by the Ministry of Science and Technology (No. M10500000011).
All Science Journal Classification (ASJC) codes
- Renewable Energy, Sustainability and the Environment
- Energy Engineering and Power Technology
- Physical and Theoretical Chemistry
- Electrical and Electronic Engineering