Ionic conductivity of Li14Zn(GeO44 (Lisicon)

Fast Li ionic conduction in solid solutions of the system Li4GeO4-Li2ZnGeO4-Li3PO4

“…2 is very similar to that reported by von Alpen et al [2] for lisicon, who attributed the response to a mixture of bulk ionic and intergranular impedance, i.e. a grain-boundary-transfer resistance.…”

“…Also included is the bulk conductivity at SO"C, extracted from the data fitting, and an extrapolated bulk conductivity value at 90°C. The data of Hong [l] and von Alpen et al [2] are included for comparison. The data from the present study shown in fig.…”

“…This temperature was selected as here the metastable compositions had not decomposed to any appreciable extent. The lisicon datum of von Alpen et al [2] as well as the data of Hu et al [8] for compositions in the Li,SiO,- [Sl.…”

“…The samples were provided with sputtered Pt electrodes, as von Alpen et al [2] reported that a reaction between MO or Cr/Au electrodes leads to an irreversible decrease in the conductivity, while reproducible results were obtained with Pt electrodes. For the ac conductivity measurements, the sample was spring loaded between Pt discs in a stainless steel conductivity cell.…”

“…Von Alpen et al [2] studied l&icon using ac conductivity methods, and dc ionic four-probe techniques. They observed conductivity values about Bn order of magnitude lower than those observed by Hong.…”