Prussian Green: A High Rate Capacity Cathode for Potassium Ion Batteries

Autor:	Raj Solanki, David R. Evans, Prasanna Padigi, Gary Goncher, Joseph Thiebes, Mitchell Swan
Rok vydání:	2015
Předmět:	Prussian blue Potassium ferrocyanide General Chemical Engineering Potassium Inorganic chemistry chemistry.chemical_element Potassium-ion battery chemistry.chemical_compound Potassium ferricyanide chemistry Electrochemistry Particle Particle size Faraday efficiency
Zdroj:	Electrochimica Acta. 166:32-39
ISSN:	0013-4686
DOI:	10.1016/j.electacta.2015.03.084
Popis:	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.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::9a18ae46dc7064108d39ef49be3c1106 https://doi.org/10.1016/j.electacta.2015.03.084 Zobrazit plný text záznamu Full Text from ScienceDirect