The isothermal transient ionic current technique was applied to β-phase samples which had been prepared by means of chemical vapor deposition. The mobility, conductivity and number of protons could be deduced from the measurements. When Li ions were intercalated electrochemically into the material, it was found that the isothermal transient ionic current method could separate the contributions which arose from proton and Li-ion conduction; in such a way that the mobilities of both species could be extracted. The lattice-gas model was used to describe the Li interaction process. This showed that the Li ions tended to be uniformly distributed, rather than attracting each other and forming clusters.

Isothermal Transient Ionic Current as a Characterization Technique for Ion Transport in Ta2O5. M.Stromme Mattsson, G.A.Niklasson: Journal of Applied Physics, 1999, 85[12], 8199-204