Ag3O4 grafted NiO nanosheets for high performance supercapacitors

作者：Babu Inbamani Manohara; Purushothaman Kamatchi Kamaraj^*; Muralidharan Gopalan

来源：Journal of Materials Chemistry A, 2015, 3(1): 420-427.

DOI：10.1039/c4ta04586f

Ag3O4 grafted NiO nanosheets were successfully synthesized via hydrothermal route. The morphological and structural analysis was performed using scanning transmission electron microscopy (STEM), scanning electron microscopy (SEM) and X-ray diffraction (XRD) studies. The grafting of Ag3O4 on NiO nanosheets enhanced the conductivity of the nanosheets and resulted in a maximum specific capacitance of 1504 F g(-1) for 5 wt% of Ag on NiO (AGN2) at a scan rate of 3 mV s(-1). The porous nature of AGN2 provides larger paths for ions, which significantly increases the intercalation of ions and utilization rate of electrode materials. Galvanostatic charge discharge (GCD) analysis reveals a specific capacitance of 1524 F g(-1) for AGN2 at a current density of 1 A g(-1) with excellent cyclic stability (12% loss after 1500 cycles). An asymmetric supercapacitor device (AGN2//RGO) achieved a specific capacitance of 274 F g(-1) with an energy density of 37 Wh kg(-1) and the power density of 499 W kg(-1) at a discharge current of 0.2 A g(-1).

• 出版日期2015