TY - JOUR
T1 - Anion Doping
T2 - A New Strategy for Developing High-Performance Perovskite-Type Cathode Materials of Solid Oxide Fuel Cells
AU - Zhang, Zhenbao
AU - Zhu, Yinlong
AU - Zhong, Yijun
AU - Zhou, Wei
AU - Shao, Zongping
N1 - Publisher Copyright:
© 2017 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
PY - 2017/9/6
Y1 - 2017/9/6
N2 - Overcoming the sluggish activity of cathode materials is critical to realizing the wide-spread application of intermediate-temperature solid oxide fuel cells. Herein, a new way is reported to tune the performance of perovskite-type materials as oxygen reduction electrodes by embedding anions (F−) in oxygen sites. The obtained perovskite oxyfluorides SrFeO3−σ−δFσ and SrFe0.9Ti0.1O3−σ−δFσ (σ = 0.05 and 0.10) show improved electrocatalytic activity compared to their parent oxides, achieving area specific resistance values of 0.875, 0.393, and 0.491 Ω cm2 for SrFeO3−δ, SrFeO2.95−δF0.05, and SrFeO2.90−δF0.10, respectively, at 600 °C in air. Such improved performance is a result of the improved bulk diffusion and surface exchange properties due to anion doping. Moreover, favorable stability in performance is also demonstrated for the F− anion-doped perovskites as oxygen reduction electrodes at 650 °C for a test period of ≈200 h. A combination of anion doping and cation doping may provide a highly attractive strategy for the future development of cathode materials.
AB - Overcoming the sluggish activity of cathode materials is critical to realizing the wide-spread application of intermediate-temperature solid oxide fuel cells. Herein, a new way is reported to tune the performance of perovskite-type materials as oxygen reduction electrodes by embedding anions (F−) in oxygen sites. The obtained perovskite oxyfluorides SrFeO3−σ−δFσ and SrFe0.9Ti0.1O3−σ−δFσ (σ = 0.05 and 0.10) show improved electrocatalytic activity compared to their parent oxides, achieving area specific resistance values of 0.875, 0.393, and 0.491 Ω cm2 for SrFeO3−δ, SrFeO2.95−δF0.05, and SrFeO2.90−δF0.10, respectively, at 600 °C in air. Such improved performance is a result of the improved bulk diffusion and surface exchange properties due to anion doping. Moreover, favorable stability in performance is also demonstrated for the F− anion-doped perovskites as oxygen reduction electrodes at 650 °C for a test period of ≈200 h. A combination of anion doping and cation doping may provide a highly attractive strategy for the future development of cathode materials.
KW - anion doping
KW - cathodes
KW - oxygen reduction reaction
KW - perovskites
KW - solid oxide fuel cells
UR - http://www.scopus.com/inward/record.url?scp=85019441780&partnerID=8YFLogxK
U2 - 10.1002/aenm.201700242
DO - 10.1002/aenm.201700242
M3 - 文章
AN - SCOPUS:85019441780
SN - 1614-6832
VL - 7
JO - Advanced Energy Materials
JF - Advanced Energy Materials
IS - 17
ER -
