TY - JOUR
T1 - A Highly Active Bifunctional Catalyst of Mn-Co-Fe-N/S@CNT for Rechargeable Zinc-Air Batteries
AU - Wang, Keliang
AU - Liu, Xiaotian
AU - Zuo, Yayu
AU - Wei, Manhui
AU - Xiao, Yu
AU - Zhang, Pengfei
AU - Xiong, Jianyin
AU - Pei, Pucheng
N1 - Publisher Copyright:
© 2021 The Electrochemical Society ("ECS"). Published on behalf of ECS by IOP Publishing Limited.
PY - 2021/11
Y1 - 2021/11
N2 - Rechargeable zinc-air batteries are promising candidates for energy storage due to their high energy density, environmentally friendliness, and low cost. However, such batteries are limited by the high cost and sluggish kinetics of noble metal catalysts. Here, we present a highly active bifunctional catalyst of Mn-Co-Fe-N/S@CNT, where the catalyst is synthesized by Mn, Co, and Fe oxides doped with N and S on porous carbon nanotubes. Mn-Co-Fe-N/S@CNT has higher electrocatalytic activity than the commercial catalysts of Pt/C and RuO2, demonstrating that the half-wave potential of the oxygen reduction reaction (ORR) of Mn-Co-Fe-N/S@CNT is 0.807 V (0.9 V with Pt/C), the initial potential is 0.85 V (0.789 V with Pt/C), the limiting current is 5.66 mA cm-2 at 0.2 V (5.69 mA cm-2 with Pt/C), and oxygen evolution reaction overpotential of Mn-Co-Fe-N/S@CNT is 0.386 V at 10 mA cm-2 (0.371 V with RuO2). Moreover, a rechargeable zinc-air battery using Mn-Co-Fe-N/S@CNT outputs a discharging voltage of 1.2 V and a stable cycle life of over 150 h at 10 mA cm-2.
AB - Rechargeable zinc-air batteries are promising candidates for energy storage due to their high energy density, environmentally friendliness, and low cost. However, such batteries are limited by the high cost and sluggish kinetics of noble metal catalysts. Here, we present a highly active bifunctional catalyst of Mn-Co-Fe-N/S@CNT, where the catalyst is synthesized by Mn, Co, and Fe oxides doped with N and S on porous carbon nanotubes. Mn-Co-Fe-N/S@CNT has higher electrocatalytic activity than the commercial catalysts of Pt/C and RuO2, demonstrating that the half-wave potential of the oxygen reduction reaction (ORR) of Mn-Co-Fe-N/S@CNT is 0.807 V (0.9 V with Pt/C), the initial potential is 0.85 V (0.789 V with Pt/C), the limiting current is 5.66 mA cm-2 at 0.2 V (5.69 mA cm-2 with Pt/C), and oxygen evolution reaction overpotential of Mn-Co-Fe-N/S@CNT is 0.386 V at 10 mA cm-2 (0.371 V with RuO2). Moreover, a rechargeable zinc-air battery using Mn-Co-Fe-N/S@CNT outputs a discharging voltage of 1.2 V and a stable cycle life of over 150 h at 10 mA cm-2.
UR - http://www.scopus.com/inward/record.url?scp=85120816654&partnerID=8YFLogxK
U2 - 10.1149/1945-7111/ac3718
DO - 10.1149/1945-7111/ac3718
M3 - Article
AN - SCOPUS:85120816654
SN - 0013-4651
VL - 168
JO - Journal of the Electrochemical Society
JF - Journal of the Electrochemical Society
IS - 11
M1 - 110529
ER -
