Document Type

Post-Print

Publication Date

3-14-2015

Subjects

Potassium ions, Cathodes

Abstract

The influence of the precursors, namely potassium ferrocyanide and potassium ferricyanide on the particles sizes of Prussian Blue (PB) and Prussian Green (PG), under identical reaction conditions have been investigated. It was found that the particle sizes influence the gravimetric capacity utilization of these materials as cathodes for aqueous potassium (K+ ) ion batteries. The PG particle sizes were on the order of 50-75 nm, whereas PB particles size were on the order of 2-10 microns. The PG cathodes demonstrated a reversible capacity of 121.4 mAhr/g, with a coulombic efficiency of 98.7% compared to PB cathodes which demonstrated 53.8 mAhr/g, with a coulombic efficiency of 100%. We interpret the increased capacity of PG batteries relative to PB batteries as being a result of the smaller particle size of PG, which results in greater accessibility of the cathode to K+ ions.

Description

This is a PDF file of an unedited manuscript that has been accepted for publication in Electrochimica Acta. The manuscript will undergo copyediting, typesetting, and review of the resulting proof before it is published in its final form.

Although accepted manuscripts do not have all bibliographic details available yet, they can already be cited using the year of online publication and the DOI, as follows: author(s), article title, Publication (year), DOI.

DOI

10.1016/j.electacta.2015.03.084

Persistent Identifier

http://archives.pdx.edu/ds/psu/14526

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