The thermodynamic and kinetic properties of silver intercalated niobium disulfide

Henny J.M. Bouwmeester*

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

17 Citations (Scopus)

Abstract

A study of structures, thermodynamic and kinetic properties of Ag intercalated 2H-NbS2 is reported. The observed phases AgxNbS2, being a dilute gasphase (x<0.22) and a second- and first-stage phase (0.22≦×≦0.30 and 0.55 ≦×≦0.76 respectively) are structurally related. Silver atoms reside in tetrahedral holes between neighbouring sandwiches of NbS2. Kinetic parameters of the mobile species (Ag) were obtained from ac response and the Galvanostatic Intermittent current Titration Technique (GITT), using samples of AgxNbS2 as solid solution electrode in an AgI electrochemical cell above 425 K. Both first- and second-stage AgxNbS2 exhibit fast ionic conduction. The relatively low chemical diffusion coefficient at 450 K, D̃ ≈ 10-6.5 cm2s-1, in the second-stage phase, as compared to that in the first-stage, D̃≈ 10-4.5 cm2s-1, is attributed to the coupling of the diffusion kinetics with stage conversion in islands type domains.

Original languageEnglish
Pages (from-to)163-169
Number of pages7
JournalSolid state ionics
Volume16
DOIs
Publication statusPublished - Jun 1985
Externally publishedYes

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