ISSN:
1433-0768
Keywords:
Key words Tantalum iron telluride
;
Alkali metal intercalation
;
Lithium
;
sodium battery
;
Lithium
;
sodium insertion
;
Electrochemical intercalation reaction
Source:
Springer Online Journal Archives 1860-2000
Topics:
Chemistry and Pharmacology
Notes:
Abstract Lithium and sodium have been topotactically inserted in the lattice of TaFe1.25Te3 by electrochemical procedures. The existence of electronically unequivalent sites occupied by tellurium atoms conditions a two-step insertion process. In each step, the alkali metal ions occupy empty sites in the structure which are coordinated by tellurium atoms of a different set of sites. The␣thermodynamic and kinetic parameters of Li x TaFe1.25Te3 and Na x TaFe1.25Te3 have been determined and compared with other inserted binary and ternary chalcogenides. The values of the free energy of intercalation are less negative than those previously reported for TaTe2 and close to those found for the misfit layer compound (PbS)1.13TaS2. The values of alkali metal ion diffusivity are closer to those reported for the binary telluride, due to the similarities in the atoms exposed to the interlayer space.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/s100080050108
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