Date of Graduation
Bachelor of Science
Chemistry & Biochemistry
Supercapacitors are ideal tools for energy storage due to their wide range of operation temperatures, long cycle-lives, high power densities of up to 13,000 W/kg, and fast rates of charge-discharge thereby having a high specific capacitance. This research reports synthesis of grapheme-based materials using a modified Hummer’s method. Graphene oxide synthesized first and then converted to reduced graphene oxide sheets and graphene-powder, which both increase the ionic conductivity due to sp2 bonding and a high surface area. These materials were then constructed into a button-cell supercapacitor for testing. For the first supercapacitors, a porous polypropylene membrane (Celgard) that acted as a separator was placed between the reduced grapheme oxide electrode sheets. Propylene carbonate diluted in sodium perchlorate solution was used as an electrolyte. As an attempt, we replaced the Celgard with a graphene oxide-COOH membrane. This acted as a
Rogers, Lea Rachel, "Developing graphene-based Supercapacitors for High Temperature Applications" (2015). Chemistry & Biochemistry Undergraduate Honors Theses. 8.