1. FeOOH-carbon nanotube-FeCo/nitrogen-doped porous carbon as an excellent bifunctional catalyst for achieving high power performance in rechargeable zinc-air batteries.
- Author
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Yang, Pei-Qing, Ko, Ta-En, Tseng, Chen-Ming, Wang, Wei-Hsuan, Huang, Cheng-Chia, Tsai, Jui-En, Fu, Yu-Chun, and Li, Yuan-Yao
- Subjects
ELECTRIC batteries ,ELECTROCATALYSTS ,STORAGE batteries ,GRAPHITIZATION ,OXYGEN evolution reactions ,CATALYSTS ,METAL-air batteries ,CARBON nanotubes - Abstract
[Display omitted] • The novel bifunctional electrocatalyst, FeOOH-CNT-FeCo/NC, with good ORR and OER performance is derived from zeolitic imidazolate framework. • The catalyst with synergistic effect of the FeCo, FeOOH, N-doping showed high activities compared to the Pt/C + Ir/C catalyst. • The catalyst with the porous and graphitized carbon framework and the CNTs are beneficial for the electron and ion transfer. • The Zn-air battery cell with the electrocatalyst demonstrated a very high power density of 284 mW cm
−2 at 365 mA cm−2 . • The charge–discharge tests showed a very stable charge–discharge potential with a retention rate of 93.7% after 686 cycles (229 hrs) at 10 mA cm−2 . Rechargeable metal-air batteries (MABs) are one of the most promising next-generation alternatives for energy storage. One of the key challenges for the eventual viability of the MAB is the development of a high-performance bifunctional catalyst for the oxygen reduction reaction (ORR) and the oxygen evolution reaction (OER). In this study, a novel bifunctional electrocatalyst consisting of a FeOOH/carbon nanotube/FeCo/nitrogen-doped porous carbon framework (FeOOH-CNT-FeCo/NC) derived from a zeolitic imidazolate framework is reported. This reported electrocatalyst showed a good ORR/OER performance with a potential difference of 0.86 V compared to Pt/C and Ir/C (1.12 V and 1.05 V). When tested in a Zn-air battery (ZAB) cell, the battery cell with the FeOOH-CNT-FeCo/NC electrocatalyst demonstrated a very high power density of 284 mW cm−2 at 365 mA cm−2 while exhibiting good cycling stability. Additionally, a very stable charge–discharge potential with a retention rate of 93.7% after 686 cycles (229 hrs) at 10 mA cm−2 was observed. [ABSTRACT FROM AUTHOR]- Published
- 2023
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