Fabrication of three-dimensional bismuth oxychloride nanoflower anchored by rGO nanosheets for high performance solid state asymmetric capacitor

The construction of transition metal oxide with reduced graphene oxide nanosheets ha a great interest in boosting the capacitance nature of the supercapacitors. Herein, we developed the bismuth oxychloride anchored with the reduced graphene oxide nanosheets (rGO@BiOCl) for enhancing the electrochemical behaviour. The monoclinic structure of BiOCl was illustrated in XRD analysis. Also, the Raman vibrational modes are illustrating the formation of rGO anchored BiOCl nanocomposite. The morphological analysis SEM and TEM analysis show the formation of rGO nanosheet anchored with the BiOCl nanoflower. The maximum capacitance for BiOCl and rGO@BiOCl are shown as 226 and 790 F/g, respectively. However, the rGO@BiOCl electrode has attained a larger capacitance retention of 97 % even at the 2000th cycle at 5 A/g. Also, both BiOCl and rGO@BiOCl electrodes have low charge transfer resistance values of 24.72 and 14.86 Ω. In addition, the electrode was constructed as sandwiched by rGO@BiOCl (positive electrode) and rGO (negative electrode) are used for asymmetric capacitor device. From the result, rGO@BiOCl//rGO ASC shows the 194 F/g of capacitance value also it shows 24.28 Wh/kg and 1285 W/kg of energy and power density values. Moreover, the rGO@BiOCl//rGO asymmetric capacitor device shows 92.79 % cyclic stability at 8 A/g. Also, it shows the 9.25 and 8.61 Ω R_ct values for after and before stability. These findings indicate that the prepared rGO@BiOCl electrode is a suitable electrode for supercapacitor devices.