Amorphous niobium pyrophosphate(NbP1.8O7)as high rate anode of Na-ion batteries
A simple method for the synthesis of niobium pyrophosphate NbP1.8O7 using polymer was proposed.A polymer-as-sisted one-step calcination was used to prepare pure-phase niobium pyrophosphate by regulating the addition amount of phos-phorus-containing polymer.The calcination heating rate was adjusted to further improve the amorphization of the anode mate-rial.Then the electrochemical performance of the electrode material was investigated.The results show that the optimized e-lectrode materials present excellent electrochemical sodium storage performance.Niobium pyrophosphate tends to be more a-morphous at temperature rise rate of 5℃/min and exhibits better electrochemical performance.It has a reversible discharge capacity of 164.6 and 101.37 mA·h/g after 5000 cycles at a current density of 1000 mA/g and 2000 mA/g.
国家科技期刊平台
NSTL
万方数据
维普
