Diffusion of 8Li Short-Lived Radiotracer in Li Ionic Conductors of NaTl-Type Intermetallic Compounds

Abstract:

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Non-destructive and on-line Li diffusion experiments in Li ionic conductors are conducted using the short-lived !-emitting radiotracer of 8Li. The radiotracers produced as an energetic and pulsed ion beam from TRIAC (Tokai Radioactive Ion Accelerator Complex) are implanted into a structural defect mediated Li ionic conductor of NaTl-type intermetallic compounds ("-LiGa and "-LiIn). The experimental time spectra of the yields of !-particles are compared with simulated results and Li diffusion coefficients in the intermetallic compounds are extracted with an accuracy of ±10%. The diffusion coefficients obtained for "-LiGa with Li content of 43-54 at.% are discussed in terms of the interaction between Li-ion and the structural defects in the specimen, compared with the cases of "-LiAl and "-LiIn. The nonlinear Li-content dependency of Li diffusion coefficients for "-LiGa suggests that the Li diffusion with the Li-deficient region is obstructed by the defect complex composed of vacancies at the Li sites.

Info:

Periodical:

Defect and Diffusion Forum (Volumes 273-276)

Edited by:

Andreas Öchsner and Graeme E. Murch

Pages:

667-672

DOI:

10.4028/www.scientific.net/DDF.273-276.667

Citation:

H. Sugai et al., "Diffusion of 8Li Short-Lived Radiotracer in Li Ionic Conductors of NaTl-Type Intermetallic Compounds", Defect and Diffusion Forum, Vols. 273-276, pp. 667-672, 2008

Online since:

February 2008

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