Abstract
Tuning semiconductors as an electrolyte for advanced low-temperature fuel cells is an exciting but challenging research subject. To realize this, we develop the cobalt-doped SrSnO3 (SrCo0.1Sn0.9O3-Î and SrCo0.2Sn0.8O3-Î) toward an electrolyte, which only permits ions to pass but blocks the electrons simultaneously. The SrCo0.2Sn0.8O3-Î electrolyte fuel cell has achieved a remarkable performance with a maximum power density of 476 mW cm-2 and obtained a high ionic conductivity of 0.12 S cm-1 at a low temperature of 520 C. This improved performance is accredited to the bandgap engineering and built-in electric field, which significantly enhanced the ionic transport while suppressing the electronic conduction. The doped SrCoSnO3-Î perovskite materials demonstrated a high potential for solving the low-temperature solid oxide fuel cell (LT-SOFC) material's challenging problems.
| Original language | English |
|---|---|
| Pages (from-to) | 6323-6333 |
| Number of pages | 11 |
| Journal | ACS Applied Energy Materials |
| Volume | 3 |
| Issue number | 7 |
| DOIs | |
| State | Published - 27 Jul 2020 |
| Externally published | Yes |
Keywords
- bandgap engineering
- doping
- effect of a junction
- high ionic conductivity
- low-temperature solid oxide fuel cell (LT-SOFC)
- semiconductor SrCoSnO