Sb nanoparticles decorated N-rich carbon nanosheets as anode materials for sodium ion batteries with superior rate capability and long cycling stability

Antimony nanoparticle decorated N-rich porous carbon nanosheets were prepared through a sol-gel route. The composite displayed high reversible capacity, superior rate performance and long cycling stability as an anode material for roomtemperature Na-ion batteries. Even at an ultrahigh charge-discharge rate of 2 A g(-1), a large specific capacity of 220 mA h g(-1) was still achieved after 180 cycles.