3:00 PM - 3:15 PM
△ [21p-N302-7] Synthesis and fast H− conduction of new lanthanum oxyhydride LaH3−2xOx
Keywords:ionic conduction, hydride ion, oxyhydride
We investigated hydride ion conduction in newly found lanthanum oxyhydride, LaH3−2xOx (0 < x < 1). X-ray and neutron diffraction revealed that the LaH3−2xOx crystalizes a fcc structure, and the hydrogen partially occupies the tetrahedral and octahedral sites. We measured the ionic and electronic conductivities by AC impedance and DC polarization techniques, respectively. An optimum ionic conductivity at 340°C reached 2.6×10−2 S cm−1 at x = 0.25, where the transport number of H− exceeded 99%.