TY - JOUR
T1 - Oxygen vacancies-rich Ce0.9Gd0.1O2-δ decorated Pr0.5Ba0.5CoO3-δ bifunctional catalyst for efficient and long-lasting rechargeable Zn-air batteries
AU - Gui, Liangqi
AU - Wang, Zhenbin
AU - Zhang, Kun
AU - He, Beibei
AU - Liu, Yuzhou
AU - Zhou, Wei
AU - Xu, Jianmei
AU - Wang, Qing
AU - Zhao, Ling
N1 - Funding Information:
We are grateful for the financial support from National Natural Science Foundation of China (Grant No. 21975229 and 11975212), and Natural Science Foundation of Zhejiang Province (Grant No. LY19E020001 and LY19B060003).
Funding Information:
We are grateful for the financial support from National Natural Science Foundation of China (Grant No. 21975229 and 11975212 ), and Natural Science Foundation of Zhejiang Province (Grant No. LY19E020001 and LY19B060003 ). Appendix A
Publisher Copyright:
© 2020 Elsevier B.V.
PY - 2020/6/5
Y1 - 2020/6/5
N2 - Rational design of bifunctional catalysts towards oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) is vital for reversible Zn-air batteries. Here, we highlight the surface functionalized perovskite, oxygen vacancies-rich Ce0.9Gd0.1O2-δ (GDC) decorated Pr0.5Ba0.5CoO3-δ (PBC), as a novel bifunctional electrode for Zn-air batteries. Surface decoration by GDC can not only introduce the abundant electrochemically active oxygen vacancies for ORR and OER, but also improve the structure stability of perovskite against practical operation. Density functional theory calculations further reveal that O2 and H2O molecules readily adsorb on GDC surface rather than PBC surface. The resulting 20 wt.% GDC decorated PBC catalyst delivers a significantly higher bifunctionality than the pristine PBC. As a proof-of-concept, an assembled Zn–air battery using 20 wt.% GDC decorated PBC electrode demonstrates a considerable peak power density and a long cycling life. This study offers a facile and effective approach to design air electrode of rechargeable Zn-air batteries.
AB - Rational design of bifunctional catalysts towards oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) is vital for reversible Zn-air batteries. Here, we highlight the surface functionalized perovskite, oxygen vacancies-rich Ce0.9Gd0.1O2-δ (GDC) decorated Pr0.5Ba0.5CoO3-δ (PBC), as a novel bifunctional electrode for Zn-air batteries. Surface decoration by GDC can not only introduce the abundant electrochemically active oxygen vacancies for ORR and OER, but also improve the structure stability of perovskite against practical operation. Density functional theory calculations further reveal that O2 and H2O molecules readily adsorb on GDC surface rather than PBC surface. The resulting 20 wt.% GDC decorated PBC catalyst delivers a significantly higher bifunctionality than the pristine PBC. As a proof-of-concept, an assembled Zn–air battery using 20 wt.% GDC decorated PBC electrode demonstrates a considerable peak power density and a long cycling life. This study offers a facile and effective approach to design air electrode of rechargeable Zn-air batteries.
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U2 - 10.1016/j.apcatb.2020.118656
DO - 10.1016/j.apcatb.2020.118656
M3 - Article
AN - SCOPUS:85078559726
SN - 0926-3373
VL - 266
JO - Applied Catalysis B: Environmental
JF - Applied Catalysis B: Environmental
M1 - 118656
ER -