Tri-functional carbon nanocages coated CoNi electrocatalyst with micro twinning structure for high-performance electrochemical devices

Highly Reversible Zn–Air Batteries Enabled by Tuned Valence Electron and Steric Hindrance on Atomic Fe–N4–C Sites

“…Zn–air batteries (ZABs) have great potential as sustainable devices for converting chemical energy into electric energy due to their environmental friendliness and high theoretical energy density and the abundance of Zn. − However, the low oxygen conversion efficiency of the air cathode restricts their development. − Although Pt-based catalysts for the oxygen reduction reaction (ORR) and Ru/Ir-based catalysts for the oxygen evolution reaction (OER) have traditionally been utilized, − the performance degradation caused by the electrochemical dissolution of active sites during the reaction is a serious issue. − In particular, to achieve the superior rechargeability of ZABs, it is necessary to improve the OER activity and stability. − …”