TY - JOUR
T1 - Ultrastable FeCo Bifunctional Electrocatalyst on Se-Doped CNTs for Liquid and Flexible All-Solid-State Rechargeable Zn-Air Batteries
AU - Zhang, Hongwei
AU - Zhao, Meiqi
AU - Liu, Haoran
AU - Shi, Shuangrui
AU - Wang, Zhenhua
AU - Zhang, Biao
AU - Song, Lin
AU - Shang, Jingzhi
AU - Yang, Yong
AU - Ma, Chao
AU - Zheng, Lirong
AU - Han, Yunhu
AU - Huang, Wei
N1 - Publisher Copyright:
© 2021 American Chemical Society.
PY - 2021/3/10
Y1 - 2021/3/10
N2 - The rechargeable Zn-air batteries as an environmentally friendly sustainable energy technology have been extensively studied. However, it is still a challenge to develop non-noble metal bifunctional catalysts with high oxygen reduction as well as oxygen evolution reaction (ORR and OER) activity and superior durability, which limit the large-scale application of rechargeable Zn-air batteries. Herein, we synthesized an ultrastable FeCo bifunctional oxygen electrocatalyst on Se-doped CNTs (FeCo/Se-CNT) via a gravity guided chemical vapor deposition (CVD) strategy. The catalyst exhibits excellent ORR (E1/2 = 0.9 V) and OER (overpotential at 10 mA cm-2 = 340 mV) properties simultaneously, surpassing commercial Pt/C and RuO2/C catalysts. More importantly, the catalyst shows an unordinary stability, that is, is no obvious decrease after 30K cycles accelerated durability test for ORR and OER processes. The small potential gap (0.75 V) represents superior bifunctional ORR and OER activities of the FeCo/Se-CNT catalyst. The FeCo/Se-CNT catalyst possesses outstanding electrochemical performance for the rechargeable liquid and flexible all-solid-state Zn-air batteries, for example, a high open circuit voltage (OCV) and peak power density of 1.543 and 1.405 V and 173.4 and 37.5 mW cm-2, respectively.
AB - The rechargeable Zn-air batteries as an environmentally friendly sustainable energy technology have been extensively studied. However, it is still a challenge to develop non-noble metal bifunctional catalysts with high oxygen reduction as well as oxygen evolution reaction (ORR and OER) activity and superior durability, which limit the large-scale application of rechargeable Zn-air batteries. Herein, we synthesized an ultrastable FeCo bifunctional oxygen electrocatalyst on Se-doped CNTs (FeCo/Se-CNT) via a gravity guided chemical vapor deposition (CVD) strategy. The catalyst exhibits excellent ORR (E1/2 = 0.9 V) and OER (overpotential at 10 mA cm-2 = 340 mV) properties simultaneously, surpassing commercial Pt/C and RuO2/C catalysts. More importantly, the catalyst shows an unordinary stability, that is, is no obvious decrease after 30K cycles accelerated durability test for ORR and OER processes. The small potential gap (0.75 V) represents superior bifunctional ORR and OER activities of the FeCo/Se-CNT catalyst. The FeCo/Se-CNT catalyst possesses outstanding electrochemical performance for the rechargeable liquid and flexible all-solid-state Zn-air batteries, for example, a high open circuit voltage (OCV) and peak power density of 1.543 and 1.405 V and 173.4 and 37.5 mW cm-2, respectively.
KW - Se-doped CNTs
KW - bifunctional oxygen electrocatalyst
KW - gravity guided CVD strategy
KW - liquid and flexible solid rechargeable Zn-air batteries
KW - outstanding durability
UR - https://www.scopus.com/pages/publications/85101827219
U2 - 10.1021/acs.nanolett.1c00077
DO - 10.1021/acs.nanolett.1c00077
M3 - 文章
C2 - 33599511
AN - SCOPUS:85101827219
SN - 1530-6984
VL - 21
SP - 2255
EP - 2264
JO - Nano Letters
JF - Nano Letters
IS - 5
ER -