Changbao Zhu, Katja Weichert and Joachim Maier Electronic Conductivity and Defect Chemistry of Heterosite FePO4 Advanced Functional Materials 21
Heterosite FePO4 exhibits a predominant electronic conductivity (σeon) which is of n-type. The main electronic and ionic defects are electrons and Li-interstitials ([Lii•] = [e′]) as suggested by conductivity investigations of solid solutions LixFePO4 (x ≤ 0.02) as well as the pO2 dependence of σeon. With reference to the ionic and electronic ground structure of heterosite, these defects are in fact expected.
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