Open AccessImpact of Synthesis Conditions in Na-Rich Prussian Blue Analogues
Author(s) -
Paula Sanz Camacho,
Romain Wernert,
Mathieu Duttine,
Alain Wattiaux,
Ashish Rudola,
Palani Balaya,
François Fauth,
Romain Berthelot,
Laure Monconduit,
Dany Carlier,
Laurence Croguennec
Publication year - 2021
Publication title -
acs applied materials and interfaces
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.535
H-Index - 228
eISSN - 1944-8252
pISSN - 1944-8244
DOI - 10.1021/acsami.1c09378
Subject(s) - prussian blue , monoclinic crystal system , orthorhombic crystal system , coprecipitation , materials science , hydrothermal synthesis , hydrothermal circulation , phase (matter) , sodium , crystallography , inorganic chemistry , electrochemistry , crystal structure , chemical engineering , chemistry , organic chemistry , metallurgy , electrode , engineering
Sodium-rich iron hexacyanoferrates were prepared by coprecipitation, hydrothermal route, and under reflux, with or without dehydration. They were obtained with different structures described in cubic, orthorhombic, or rhombohedral symmetry, with variable compositions in sodium, water, and cationic vacancies and with a variety of morphologies. This series of sodium-rich Prussian blue analogues allowed addressing the relationship between synthesis conditions, composition, structure, morphology, and electrochemical properties in Na-ion batteries. A new orthorhombic phase with the Na 1.8 Fe 2 (CN) 6 ·0.7H 2 O composition synthesized by an hydrothermal route at 140 °C is reported for the first time, whereas a phase of Na 2 Fe 2 (CN) 6 ·2H 2 O composition obtained under reflux, previously described with a monoclinic structure, shows in fact a rhombohedral structure.
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