[14p-A407-1~12] 16.1 Fundamental properties, evaluation, process and devices in disordered materials

[14p-A407-5] Hybridization of the Na₂Fe_xNi_1-xP₂O₇ glass-ceramic and NaPO₃ glass

〇YONGZHENG JI¹, Honma Tsuyoshi¹, Komatsu Takayuki¹ (1.Nagaoka University of Technology)

Keywords:glass-ceramics, sodium ion secondary battery, all solid state battery

Pyrophosphate Na₂MP₂O₇ is promising as a cathode material for sodium ion secondary batteries. It has a stable network structure and shows three-dimensional diffusion of sodium ions. However, we hope to further improve the discharge potential, so high potential Na₂NiP₂O₇ was focused. In this study, we tried to elucidated the crystallization mechanism of Na₂NiP₂O₇ glass, proposed a method for activating the positive electrode, and evaluated its electrochemical properties.