Electrochemical Properties of Bacto-agar and Commercial Agar Applying in Porous Zinc Anode for Zn-air Battery.

Due to ion mobility properties, Zn powder had been chosen as anode part in this Zn-air battery study. So, binder is needed to produce the compact form of Zn anode since the powder form will segregate and move freely in the electrolyte. The presence of the binder should be importantly considered if the binder will affect the electrochemical performance of battery. The conductivity test was conducted on binder to verify the ability of natural binder as ionic carrier in porous Zn anode by applying different concentration of KOH. Then, second test is to find out the electrochemical stability window of binder in the different concentration of KOH. The conductivity value increasing with increasing of KOH concentration with the recorded highest value owned by Bacto-agar in 0.2 M KOH, 1.63 x 10⁴ Scm^-1. However, the highest window stability value was possessed by commercial agar with the value of 2.219 V in 0.2 M KOH. [ABSTRACT FROM AUTHOR]