Sintering temperature dependency on sodium‐ion conductivity for Na ₂ Zn ₂ TeO ₆ solid electrolyte

We investigated the sintering temperature dependency on properties of Na2Zn2TeO6 (NZTO) solid electrolyte synthesized via a conventional solid-state reaction method. Sintering calcined NZTO powder, which was obtained by calcination precursor at 850℃, changed in range from 650 to 850℃. X-ray diffraction analysis showed that P2-type layered phase formed all sintered samples without forming any secondary phases. The relative densities were approximately 83%−85% for 700℃ or higher. sodium-ion conductivity above 10−4 S cm−1 room and highest 4.0 × sample 750℃. obtain is 100℃ lower than used previous works. Such low compared other Na-based oxide electrolytes could be useful co-sintering with electrode active materials fabrication all-solid-state battery.