TY - JOUR
T1 - Magnesium tuned triple conductivity and bifunctionality of BaCo0.4Fe0.4Zr0.1Y0.1O3-δ perovskite towards reversible protonic ceramic electrochemical cells
AU - Liang, Mingzhuang
AU - Song, Yufei
AU - Liu, Dongliang
AU - Xu, Longwei
AU - Xu, Meigui
AU - Yang, Guangming
AU - Wang, Wei
AU - Zhou, Wei
AU - Ran, Ran
AU - Shao, Zongping
N1 - Publisher Copyright:
© 2022 Elsevier B.V.
PY - 2022/12/5
Y1 - 2022/12/5
N2 - The performance of reversible protonic ceramic electrochemical cells (R-PCECs) was significantly limited, due to lack of suitable air electrode materials specifically designed to match proton conducting electrolyte. Here, we report by doping a small amount of magnesium (5 %), a phase-pure triple conducting Ba(Co0.4Fe0.4Zr0.1Y0.1)0.95Mg0.05O3-δ (BCFZYM) perovskite is developed as an air electrode for R-PCECs. The doping of 5 % Mg effectively enhances oxygen/steam surface exchange, oxygen-ion and proton conductivity, consequently significantly improves catalytic oxygen reduction and evolution reactions (ORR/OER) activities over protonic electrolytes. R-PCECs with the BCFZYM display excellent performances in both fuel cell (850 mW cm-2 at 600 °C) and electrolysis modes (−1244 mA cm-2 at 1.3 V at 600 °C). In addition, the R-PCECs show favorable stability in cycling (110 h), electrolysis (200 h) and fuel cell modes (300 h), demonstrating that BCFZYM air electrode has excellent operating stability.
AB - The performance of reversible protonic ceramic electrochemical cells (R-PCECs) was significantly limited, due to lack of suitable air electrode materials specifically designed to match proton conducting electrolyte. Here, we report by doping a small amount of magnesium (5 %), a phase-pure triple conducting Ba(Co0.4Fe0.4Zr0.1Y0.1)0.95Mg0.05O3-δ (BCFZYM) perovskite is developed as an air electrode for R-PCECs. The doping of 5 % Mg effectively enhances oxygen/steam surface exchange, oxygen-ion and proton conductivity, consequently significantly improves catalytic oxygen reduction and evolution reactions (ORR/OER) activities over protonic electrolytes. R-PCECs with the BCFZYM display excellent performances in both fuel cell (850 mW cm-2 at 600 °C) and electrolysis modes (−1244 mA cm-2 at 1.3 V at 600 °C). In addition, the R-PCECs show favorable stability in cycling (110 h), electrolysis (200 h) and fuel cell modes (300 h), demonstrating that BCFZYM air electrode has excellent operating stability.
KW - Mg-doping
KW - Oxygen evolution reaction
KW - Oxygen reduction reaction
KW - Perovskite
KW - Reversible protonic ceramic electrochemical cells
UR - http://www.scopus.com/inward/record.url?scp=85136284536&partnerID=8YFLogxK
U2 - 10.1016/j.apcatb.2022.121868
DO - 10.1016/j.apcatb.2022.121868
M3 - 文章
AN - SCOPUS:85136284536
SN - 0926-3373
VL - 318
JO - Applied Catalysis B: Environmental
JF - Applied Catalysis B: Environmental
M1 - 121868
ER -