## 3 Results and Discussion
### Electrochemical Performance of CSLDH Electrode
Furthermore, the capacity behavior of the CSHDS, CSLDH-1 and CSLDH-2 electrodes was studied by CV analysis at different voltage scan rates (10-80 mVs\({}^{-1}\)), as demonstrated in Figure 11. The individual CV profiles displayed clear pairs of oxidation and reduction peaks. In Figure 11b, a pair of redox peaks are observed for the CSHDS electrode with platelike morphology at a scan rate of 5 mVs\({}^{-1}\), which are assigned to the reversible redox reactions of Sn\({}^{2+}\)/Sn\({}^{4+}\) and Co\({}^{2+}\)/Co\({}^{3+}\) transitions associated with OH anions. At a high scan rate of 80 mVs\({}^{-1}\), the anodic and cathodic peaks altered, which suggests that this redox reaction was easily reversible and could be used for fast charging/discharging in supercapacitors. An almost similar observation was also found in the CSLDH-1 electrode, which has a dominantly fibrous morphology. Furthermore, the optimized electrode of CSLDH-2, which has one dimensional nanofibrous morphology, shows a predominant redox reaction during anodic and cathodic sweeps in CV. With the increasing scan rate, the CSLDH-2 electrode seems to have improved in terms of holding the nature of its CV profile compared to the other electrodes, proposing that the rate capability of this electrode is significantly higher. On the other hand, a partial contribution from the double layer mechanism is also observed, as evidenced by the small rectangular area that appeared between \(-0.05\) to \(0.1\) V. Similar to oxide-based electrodes, the capacitance of these electrodes is thought to occur predominantly because of pseudocapacitance mechanism that belongs to the reversible redox mechanism occurring between the electrode and the electrolyte. In conclusion, the CV curves of all the electrodes show that the current of the redox peak increases with increasing scan rate. Moreover, from the CV curves, it is observable that the oxidation-reduction peaks are moving towards the higher and lower potentials due to the reinforced electric polarization and feasible kinetic irreversibility of the electrolytic ion on the electrode surface [40]. The potential of the electrodes changes more and more, leading to inadequate redox reactions on the interfaces between the electrode and the electrolyte. Therefore, the pseudocapacitance primarily derived from redox reactions slowly reduces. The material exhibited redox peak in CV curve should not be considered a pseudocapacitor, as the capacitance of the electrode keeps altering over the whole potential window. Therefore, the electrochemical performance of the Sn/Co electrodes was measured in terms of the specific capacity instead of specific capacitance [40]. Once the CV analysis was performed to verify the capacity nature, including pseudocapacitance, the galvanostatic charge-discharge measurement was carried out to investigate the charge-discharge performance for all prepared electrodes. For the better applicability of the electrodes, it can be directly evaluated by the charge-discharge performance. Figure 12a shows the CD curves of the CSHDS, CSLDH-1 and CSLDH-2 at the current density of the 1 Ag\({}^{-1}\) in potential range of the 0.0 to 0.5 V. Consistent with the outcomes of the CV analysis of these three electrodes, the discharge period of the CSHDS electrode is significantly higher than that of the CSLDH-1 electrode, which has plate morphology. Furthermore, the discharge time considerably increased when the plate morphology completely transformed into a one dimensional morphology. Such enhanced performance in the electrochemical response might be due to high surface-to-volume ratio and electric conductivity, which allows more redox reactions to occur and hence better capacity to be achieved. All the electrodes indicated an analogous behavior over the course of both charge and discharge process.