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FeTiO 3 as Anode Material for Sodium‐Ion Batteries: from Morphology Control to Decomposition
Author(s) -
Brugnetti Gabriele,
Fiore Michele,
Lorenzi Roberto,
Paleari Alberto,
Ferrara Chiara,
Ruffo Riccardo
Publication year - 2020
Publication title -
chemelectrochem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.182
H-Index - 59
ISSN - 2196-0216
DOI - 10.1002/celc.202000150
Subject(s) - ilmenite , electrochemistry , anode , materials science , chemical engineering , hydrothermal circulation , decomposition , ion , lithium (medication) , degradation (telecommunications) , potassium hydroxide , inorganic chemistry , mineralogy , chemistry , electrode , computer science , organic chemistry , medicine , telecommunications , engineering , endocrinology
Ilmenite, general formula FeTiO 3 , has been proposed as possible conversion anode material for lithium‐ and sodium‐ion batteries, with theoretical capacity of 530 mAhg −1 . Experimentally, the observed specific capacity for pristine ilmenite is far away from the theoretical value; for this reason, the control of morphology via alkaline hydrothermal treatment has been proposed as possible strategy to improve the electrochemical performance. At the same time FeTiO 3 is prone to react with sodium and potassium hydroxide, as already demonstrated by studies on the degradation of ilmenite for the extraction of TiO 2 . In this paper we demonstrate that the alkaline treatment does not induce a morphological modification of the FeTiO 3 powders but involved the degradation of the precursor material with the formation of different phases. A complete physicochemical and electrochemical characterization is performed with the aim of correlating structural and functional properties of the obtained products.