The electrochemical performance of NiO nanowalls/Ni anode in half-cell and full-cell sodium ion batteries.

NiO nanowalls with mean diameter of 300 nm and mean thickness of 30 nm have been successfully grown on Ni foam via an electrochemical corrosion approach and subsequent sintering. The NiO-Ni shows superior electrochemical performance as anode for sodium ion batteries owing to the morphological and architectural advantages. It delivers high charge/discharge capacity of 491/501 mAh g −1 after 100 cycles at specific capacity of 300 mAh g −1 in a half cell. When matching with a Na 3 V 2 (PO 4 ) 3 cathode, it can also deliver charge/discharge capacity of 103/108 mAh g −1 after 50 cycles. [ABSTRACT FROM AUTHOR]