In-situ observation of the gas evolution process on the air electrode of Zn-air batteries during charging

An in-depth study of the gas evolution process on the air electrode was carried out by in-situ characterization. The results show that the charging process can be divided into three typical stages, and at lower current densities and extents of discharge/charge, the air electrode can always maintain a "self-cleaning" state to be free of bubbles. This work provides an understanding of the charging behavior on the air electrode, promoting the practical development of metal-air batteries.

June 2021