The authors regret that the Fig. 5 of the paper contains an error. In particular, the charge/discharge curves of the sample ZnO-NS (circles) are reversed: open symbols refer to discharge and filled ones refer to charge. Here we are reporting the corrected Fig. 5.Image 1 Fig. 5. Cycling performances of films grown of Pt-SS substrates based on ZnO nanosheets, pristine (circles) and coated with layers of graphite with different thickness: 110 Å (squares) 350 Å (triangles). Filled symbols: discharge. Open symbols: charge. The authors would like to apologise for any inconvenience caused.