The Effects of a Premixed Electrolyte in Zn-MnO2 Alkaline Rechargeable Batteries

Abstract

Zinc-Manganese Dioxide (Zn-MnO2) batteries have been at the forefront of rechargeable battery research due to their low cost, increased safety, and high capacity for use in small electronic devices and wearable technology. Zn-MnO2 batteries however form inactive compounds during charge and discharge that hinder their ability to be utilized in rechargeable settings. Due to this, optimization of the layers of the battery (Anode, Cathode, and Electrolyte) must be performed to improve the performance of the battery. This research was centered on the improvement of the electrolyte layer in the battery. Many electrolytes fabricated utilize two different solutions that are mixed. Due to this, both solutions are never fully incorporated into one another, causing discrepancies in the consistency of the electrolyte. Here, the electrolyte utilized was a 5:1 ratio of Chitosan and Polyvinyl Alcohol respectively, that was premixed before drying. This new process of electrolyte formation was compared between 150?m and 250?m, and the best electrolyte was then compared tothe old process of electrolyte formation of mixing solutions separately, and to a premixed electrolyte thinner than 150?m to see at what point the preferred thickness is reached. These electrolytes were compared on their Ionic Conductivity, Ionic Conductance, and Ion Transference Number. These electrolytes were then used in the fabrication of Zn-MnO2 batteries to see their performance within a full battery as compared to previously used electrolytes.