Electrochemical behavior of Zn anodes in Zn/air batteries for nano-roughened ZnO structure synthesis

The nano-roughened ZnO structure synthesized by electrochemical process in Zn-air battery without injected any external energy at room temperature are characterized. The electrochemical reaction mechanism creates to the concentration gradient of the electrolyte, which cause the localized of Zn with excess electrolyte to form the nano-roughened ZnO upon Zn electrode. As the output current sustained increase over than 150 mA, the tip-like structure transfers into rod-like structure, which ascribe to the cell polarization start to be serious affected by mass transport limitations. Furthermore, the ZnO sample grown in an oxygen deficient environment promoted the more oxygen vacancy.