Na0.56Ti1.72Fe0.28O4: a novel anode material for Na-ion batteries

A novel Na0.56Ti1.72Fe0.28O4 material is explored as an anode in Na-ion batteries for the first time. It delivers a reversible discharge capacity of 210.3 mA h g−1 at 20 mA g−1 in Na-ion batteries, exhibiting good capacity retention at a cut-off voltage of 0.01–3 V.