A high-entropy perovskite cathode for solid oxide fuel cells
Abstrak
Abstract A new concept of high-entropy cathode is reported, which can bring about a definite improvement of electrochemical performance for solid oxide fuel cells (SOFCs). As a proof-of-concept, a new high-entropy perovskite oxide of La0.2Pr0.2Nd0.2Sm0.2Ba0.1Sr0.1Co0.2Fe0.6Ni0.1Cu0.1O3-δ (HEP) is successfully synthesized by a facile one-pot combustion method and proposed as a potential cathode for SOFC at intermediate temperatures. The high-entropy HEP formed a single phase of cubic perovskite structure and matched well with the adjacent electrolyte of Gd0.2Ce0.8O2-δ (GDC). The high-entropy HEP shows a sufficient electrical conductivity of 635.15 S·cm-1 at 800 °C. The high-entropy cathode of HEP achieved a much lower polarization resistance of 0.3 Ω·cm2 on YSZ electrolyte at 800 °C, which was only half of 0.6 Ω·cm2 for conventional La0.8Sr0.2FeO3-δ (LSF) cathode under same conditions. The YSZ-based SOFC with HEP cathode exhibited an outstanding output performance of 714.5 mW·cm-2 at 800 °C, indicating that the high-entropy perovskite as a new-type SOFC cathode is promising.
Topik & Kata Kunci
Penulis (12)
Quan Yang
Guoqing Wang
Haodong Wu
Bayu Admasu Beshiwork
D. Tian
Shiyue Zhu
Yang Yang
Xiaoyong Lu
Yanzhi Ding
Y. Ling
Yonghong Chen
B. Lin
Akses Cepat
PDF tidak tersedia langsung
Cek di sumber asli →- Tahun Terbit
- 2021
- Bahasa
- en
- Total Sitasi
- 110×
- Sumber Database
- Semantic Scholar
- DOI
- 10.1016/J.JALLCOM.2021.159633
- Akses
- Open Access ✓