Intercalation materials from azamacrocycles and layered sulfides: electrical and electrochemical behaviour
作者： An�bal Villanueva , Eduardo Ruiz-Hitzky
DOI: 10.1039/B311854A
关键词: Electrochemistry 、 Inorganic chemistry 、 Sulfide 、 Thermal stability 、 Alkali metal 、 Lithium 、 Electrical resistivity and conductivity 、 Chemistry 、 Transition metal 、 Intercalation (chemistry)
摘要: The intercalation of poly-oxo-aza-macrocyclic compounds (azacrowns, AZC) in layered sulfides, such as TiS2 and TaS2, giving MS2(AZC)n (M = Ta, Ti; n ≈ 0.2) compounds, takes place at 200 °C during 2 days contact time between the MS2 AZC absence air. basal spacing increase about 0.4 nm is compatible with thickness macrocycle a pseudo-planar arrangement sulfide layers. exhibit good thermal stability. TaS2 derivatives show superconducting behaviour Tc values close to 3 K. resistivity pristine sulfides strongly increased by intercalation. Electrochemical insertion lithium could be carried out reversible manner, diffusion coefficients, determined from GITT pulse-relaxation experiments, being two orders magnitude lower than Li sulfides.
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