TY - JOUR
T1 - Facile anion engineering
T2 - A pathway to realizing enhanced triple conductivity in oxygen electrodes for reversible protonic ceramic electrochemical cells
AU - Chen, Xi
AU - Yu, Na
AU - Bello, Idris Temitope
AU - Guan, Daqin
AU - Li, Zheng
AU - Liu, Tong
AU - Shao, Zongping
AU - Ni, Meng
N1 - Publisher Copyright:
© 2023 Elsevier B.V.
PY - 2023/11
Y1 - 2023/11
N2 - Reversible proton ceramic electrochemical cells (R-PCECs) have emerged as a promising solution for sustainable energy conversion and storage at intermediate temperatures. However, the sluggish oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) kinetics at the air electrodes of R-PCECs limit the cell performance. To achieve improved ORR/OER catalytic performance, we propose a practical approach of strategic anion engineering on the oxygen site of air electrode materials. Specifically, the popular triple H+/e−/O2− conducting oxide (TCO) Ba0.5Sr0.5Co0.8Fe0.2O3−δ (BSCF) is selected to enhance the limiting H+/O2− generation and migration processes as an efficient air electrode for R-PCECs. By introducing different electronegative elements (F and Cl) to weaken metal-oxygen bonds (M-O), the oxygen chemical environment of the electrode material was optimized, thereby promoting surface oxygen exchange and O2−/H+ bulk migration. The resulting Ba0.5Sr0.5Co0.8Fe0.2O2.9-σF0.1 electrode exhibits enhanced proton uptake/mobility and catalytic activity for ORR and OER, as well as improved stability. This research offers a rational design strategy for engineering high-performance R-PCEC air electrodes with enhanced operating stability for efficient and sustainable energy conversion and storage.
AB - Reversible proton ceramic electrochemical cells (R-PCECs) have emerged as a promising solution for sustainable energy conversion and storage at intermediate temperatures. However, the sluggish oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) kinetics at the air electrodes of R-PCECs limit the cell performance. To achieve improved ORR/OER catalytic performance, we propose a practical approach of strategic anion engineering on the oxygen site of air electrode materials. Specifically, the popular triple H+/e−/O2− conducting oxide (TCO) Ba0.5Sr0.5Co0.8Fe0.2O3−δ (BSCF) is selected to enhance the limiting H+/O2− generation and migration processes as an efficient air electrode for R-PCECs. By introducing different electronegative elements (F and Cl) to weaken metal-oxygen bonds (M-O), the oxygen chemical environment of the electrode material was optimized, thereby promoting surface oxygen exchange and O2−/H+ bulk migration. The resulting Ba0.5Sr0.5Co0.8Fe0.2O2.9-σF0.1 electrode exhibits enhanced proton uptake/mobility and catalytic activity for ORR and OER, as well as improved stability. This research offers a rational design strategy for engineering high-performance R-PCEC air electrodes with enhanced operating stability for efficient and sustainable energy conversion and storage.
KW - Metal-oxygen bonds (M-O)
KW - Oxygen evolution reaction (OER)
KW - Oxygen reduction reaction (ORR)
KW - Reversible protonic ceramic electrochemical cells (R-PCECs)
KW - Triple H/e/O conducting oxide (TCO)
UR - http://www.scopus.com/inward/record.url?scp=85177048373&partnerID=8YFLogxK
U2 - 10.1016/j.ensm.2023.103056
DO - 10.1016/j.ensm.2023.103056
M3 - 文章
AN - SCOPUS:85177048373
SN - 2405-8297
VL - 63
JO - Energy Storage Materials
JF - Energy Storage Materials
M1 - 103056
ER -
