Exploring the Effects of Copper on Composition and Charge Storage of Prussian Blue Analogue Pseudocapacitors
Dr. Jennifer Hampton , Physics
As energy usage has increased in recent years, there has been great demand for efficient, cost-effective, and earth-abundant materials to be used for energy storage. The ability to produce hexacyanoferrate (HCF) modified nickel film for use as a pseudocapacitor has already been demonstrated. This project focuses on the effects on the modification procedure and the resulting material of adding copper to the nickel metal film. A NiCu film was deposited onto a gold substrate with a controlled potential electrolysis experiment, then was modified and characterized with a cyclic voltammetry experiment. The composition was determined with a scanning electron microscope with energy dispersive x-ray spectroscopy before and after the modification process. Copper was selectively removed in some cases as a result of the modification. With increased levels of copper, the material can become structurally unsound and result in unintentional stripping of the material. Preliminary data suggests that as the pre-modification level of copper is increased, the resulting charge storage of the HCF film increases as well.
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