Bamboo fiber–derived bifunctional electrocatalyst for rechargeable Zn-air batteries

Abstract

Low-cost and high-performance bifunctional electrocatalysts for e cient oxygen reduction reaction (ORR)/oxygen evolution reaction (OER) are vital for the applications of rechargeable Zn-air batteries (ZABs). Herein, a porous carbon material is fabricated by traditional pulp and papermaking and carbonization process from bamboo. The resultant carbon paper catalyst possesses a high surface area, porous structure and high content of nitrogen. Bene ting from these characteristics, this material exhibits remarkable ORR and OER catalytic performances. The aqueous rechargeable Zn-air batteries assembled with this catalyst exhibit a high power density of 279.5 mW cm −2 . This work paves an encouraging way for the industrial production of cost-effective catalysts in a sustainable manner.