Abstract
In order to investigate the role of iron additive in the Ni 3S 2 electrode, the Ni 3S 2 electrode was prepared by addition of iron. The discharge properties of Na/Ni 3S 2 cells using 1 M NaCF 3SO 3 in tetra(ethylene glycol)dimethyl ether liquid electrolyte were investigated at room temperature. The Na/Ni 3S 2 cell had an initial discharge capacity of 400 mAh g −1 with a plateau potential at 0.84 V versus Na/Na +. The discharge capacity decreased to 255 mAh g −1 after 15 cycles. Iron additive in Ni 3S 2 electrode played a role as a conductive agent and did not form iron sulfide during charging.
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