Sodium Iron Pyrophosphate Cathode Glass-Ceramics for Sodium Ion Batteries - (PPT)

摘要

Fabrication of Na_(2-x)Fe_(1+x)/P_2O_7 glass-ceramics for rechargeable sodium ion battery: Triclinic Na_(2-x)Fe_(1+x)/P_2O_7 was formed by reduction heat-treatment during x=0-0.44. Na_2FeP_2O_7 grains are covered with amorphous layer, which assists electronic conduction. The water durability is much better than NaFeO_2 layer structure. Compositional dependence of discharge capacity did not follow with theoretical value, This results suggests crystal composition is different from starting composition.