Wood Carbon Based Single-Atom Catalyst for Rechargeable Zn–Air Batteries

By Linxin Zhong, Chengyu Jiang, Mengting Zheng, Xinwen Peng, Tongchao Liu, S. Xi, X. Chi, Qinghua Zhang, Linyang Gu, Shanqing Zhang and 9 more. ACS Energy Letters, 2021

180 citations recorded by the source corpus.

: Low-cost and efficient oxygen reduction reaction (ORR)/oxygen evolution reaction (OER) bifunctional electrocatalysts are vital for the applications of rechargeable Zn-air batteries (ZABs). Given the high catalytic activity of single-atom catalysts (SACs), preparing SACs on a large-scale for ZABs is desirable, but remains challenging. Herein, in-situ formation of single-atom Fe-N-C catalysts on plate wood-based porous carbon is achieved via facile Lewis acid pre-treatment and carbonization process. Lewis acid FeCl 3 pretreatment on the cell wall of wood not only produces abundant microchannels, but also successfully introduces atomically dispersed Fe-N active species into the hierarchical structure. Such uniformly dispersive SACs on the hierarchical structure enhance ORR/OER performance and durability. ZAB using the catalyst in the cathode shows a high power density (70.2 mW cm -2 , at quasi-solid-state) and long-term stability. This work provides a new path for the large-scale preparation of high-performance SACs.

Subfields: Electrical and Electronic Engineering, Electronic, Optical and Magnetic Materials, Renewable Energy, Sustainability and the Environment

View Paper: https://www.semanticscholar.org/paper/aecbd65934a67a2fe6adc83e7b8f96df0617ca56