Reversible Aluminum‐Ion Intercalation in Prussian Blue Analogs and Demonstration of a High‐Power Aluminum‐Ion Asymmetric Capacitor

Electroanalytical, structural, and microanalytical techniques are combined to demonstrate the first clear and convincing case of electrochemical storage by Al-ion intercalation in a Prussian blue analog host. In addition, a high power asymmetric capacitor using Al-ion intercalation is demonstrated. Al, Fe, and Cu elemental maps of intercalated Al0.18 K0.02Cu[Fe(CN)6]0.7·3.7H2O obtained by transmission electron microscopy (TEM) energy-dispersive X-ray spectroscopy (EDX) area scan are shown. As a service to our authors and readers, this journal provides supporting information supplied by the authors. Such materials are peer reviewed and may be re-organized for online delivery, but are not copy-edited or typeset. Technical support issues arising from supporting information (other than missing files) should be addressed to the authors. Please note: The publisher is not responsible for the content or functionality of any supporting information supplied by the authors. Any queries (other than missing content) should be directed to the corresponding author for the article.