Correction to: Ionics (2019) 25:2585–2594

https://doi.org/10.1007/s11581-018-2796-8

The authors regret to have uploaded the wrong Fig. 8 of this manuscript during the submission of the revised manuscript. The correct Fig. 8 is included here and Fig. 8c should be CV curve of S 5.0 sample as the original article mentioned. This correction does not affect the concept or any other information provided in other parts. In addition, the results and conclusions of the paper also remain valid.

Fig. 8
figure 1

CV curves of the a the pristine, b S 1.0, and c S 5.0 samples

The authors sincerely apologize for this mistake.