Li+-ion conductivity of BPO4–Li2O; the relation between crystal structure and ionic conductivity (original) (raw)

Solid State Ionics, 1999

Abstract

By combining structural data with electrical data of nano-structured Li-doped BPO4 the relation between crystal structure and Li+-ion conductivity is derived. A maximum ionic conductivity is found by changing the Li-doping level and is related to the structural changes. Previously, two possible defect models for Li-doped BPO4 were derived from structural data, however the maximum conductivity could not be explained by these defect models. From preliminary Rietveld refined X-ray diffraction data this maximum can be attributed to a change in the a- and c-axes and the related tunnel size for Li+ ions. Another possible explanation for the conductivity maximum is the role of the particle size which depends on the Li-doping level.

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