Amorphous iron phosphate: potential host for various charge carrier ions

By V. Mathew, Sungjin Kim, Jungwon Kang, J. Gim, Jinju Song, Joseph Paul Baboo, Wang-hee Park, Docheon Ahn, Junhee Han, L. Gu and 4 more. 2014

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Unlike crystalline electrodes wherein ion insertion is crucially dependent on the presence of energetically equivalent sites, nanostructured amorphous iron(III) phosphate hosts prepared by room temperature strategies and possessing porous properties facilitate the insertion of alkali ions with different sizes and also higher charge carriers including divalent cations (Mg2+−0.72A, Zn2+-0.74 A) or trivalent cations (Al3+−0.53 A). This versatile cathode stores electrical energy by a reversible amorphous to crystalline reconstitutive reaction that occurs during electrochemical reaction with monovalent sodium, potassium and lithium. The study presents opportunities to develop amorphous electrodes with similar phase behavior for energy storage applications.

Subfields: Electrical and Electronic Engineering, Electronic, Optical and Magnetic Materials

View Paper: https://www.semanticscholar.org/paper/64fc91e617cbc0ce7b6761ada97669474cf0b010