화학공학소재연구정보센터
Journal of Industrial and Engineering Chemistry, Vol.121, 338-347, May, 2023
FeOOH-carbon nanotube-FeCo/nitrogen-doped porous carbon as an excellent bifunctional catalyst for achieving high power performance in rechargeable zinc-air batteries
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.