13. Improvements to Battery Systems Through Surface Modification

Robert Dick Trine University
Faculty Sponsor(s): Yingwen Cheng Northern Illinois University
Batteries are an important energy storage device used in everyday life. One common type of battery is the alkaline type, also known as the zinc-manganese oxide battery, which has a zinc anode and manganese oxide cathode. Alkaline batteries are popular because they are inexpensive and easy to manufacture. However, a major issue with these batteries is that they cannot be recharged. A primary reason for recharging issues is that during the charging process Mn2+ ions are lost from the cathode. The purpose of this research was to add a self-assembled monolayer (SAM) to form a protective layer on the surface of the cathode to trap the Mn2+ ions. The SAM layer used was composed of a polar trichlorosilane head group and a nonpolar fluorocarbon tail. The effectiveness of the SAM layer was tested by comparing charge/discharge cycles on cells constructed with both unprotected and protected cathodes. Modified cathodes were shown to have greater capacity retention when compared to standard, unmodified, cathodes. This work shows the potential for improvements to the commonly used alkaline battery that could allow for stable recharging.
Chemistry
Poster Presentation

When & Where

Irwin Library 1st Floor