A Review of Bifunctional Catalysts for Zinc-Air Batteries
Nguyễn Hữu Huy Phúc, Tran Anh Tu, Lưu Cẩm Lộc, Cao Xuan Viet, Pham Thi Thuy Phuong, Tri Nguyen, Thang Van Le
Abstract
Zinc–air batteries are promising candidates as stationary power sources because of their high specific energy density, high volumetric energy density, environmental friendliness, and low cost. The oxygen-related reactions at the air electrode are kinetically slow; thus, the air electrode integrated with an oxygen electrocatalyst is the most critical component, and inevitably determines the performance of a Zn–air battery. The aim of this paper was to document progress in researching bifunctional catalysts for Zn–air batteries. The catalysts are divided into several categories: noble metal, metal nanoparticle (single and bimetallic), multicomponent nanoparticle, metal chalcogenide, metal oxide, layered double hydroxide, and non-metal materials. Finally, the battery performance is compared and discussed.