Anomalous Temperature Dependences of Na2MnP2O7 Electrical Properties

12th International Symposium on Systems with Fast Ionic Transport (ISSFIT-12): Program and Abstracts 2016
S. Daugela, T. Šalkus, A. Kežionis, Dagnija Valdniece, Antonija Dindune, M. Barre, A.F. Orliukas

Impedance spectroscopy of the sintered Na2MnP2O7 ceramics was performed in the frequency range of 10 Hz – 3 GHz and 300-700 K temperature interval. Surprisingly, a significant decrease of conductivity was observed up to 340 K. It was shown, that a very small amount of water in the sodium-manganese-pyrophosphates effects their room temperature conductivity, which must be mixed Na+ and protonic at the same time. At 670-680 K a sharp increase of conductivity and dielectric permittivity was associated with a phase transition taking place in Na2MnP2O7. The anomalous change of electrical parameters at the phase transition temperature was frequency independent.

Atslēgas vārdi
battery cathode

Daugela, S., Šalkus, T., Kežionis, A., Valdniece, D., Dindune, A., Barre, M., Orliukas, A. Anomalous Temperature Dependences of Na2MnP2O7 Electrical Properties. No: 12th International Symposium on Systems with Fast Ionic Transport (ISSFIT-12): Program and Abstracts, Lietuva, Kaunas, 3.-7. jūlijs, 2016. Kaunas: 2016, 105.-105.lpp.

Publikācijas valoda
English (en)