Investigations On The Formation Regime Of Silver Electrode In Silver-Zinc Battery

Along with the development of technology and more extensive application of silver-zinc battery, advance of the performances are required, include higher voltage accuracy and better performances behind reserve. Silver electrode is the positive electrode of silver-zinc battery and influences the final performances of silver-zinc battery. Recently, new silver electrodes are developed in materials and techniques. But, the electrochemically prepared silver electrodes are still widely applied. Therefore, how enhance the performances of silver electrodes become the research hotspot.Formation is an important process and directly influences the performances of silver electrode. This paper studies various formation regimes of silver-zinc battery.Firstly, charge regimes and formation temperature are studied. Charge regimes include constant current charge, variation current charge, shallow discharge after charge, halogen ion method, asymmetric alternating current charge. Besides, high temperature charge is studied. Moreover, silver electrodes are studied after accelerative aging. The experimental results show that variation current charge regime may advance the capacity and discharge performance at high current density of the electrodes. But, high voltage plateau still exist at low current density. That shallow discharge after charge may eliminate high voltage plateau and advance discharge voltage at the load moment. Halogen ion method, asymmetric alternating current charge regime and high temperature charge regime may all eliminate high voltage plateau and advance the capacity. The shallow discharge after charge regime and high temperature charge may advance the electrodes performances after aging.Secondly, treatment methods after formation are studied. Treatment methods include drying natural, drying at 50℃, dipping in KCl, remaining in KOH, remaining in water just below boiling point. The experimental results show that treatment for electrodes after formation may eliminate high voltage plateau and enhance the stability of AgO.The results of this paper provide technical reservoir for design of silver-zinc battery, and establish basis for improving the performances of silver-zinc battery.