Facile synthesis of mesoporous Gd2O3/CuS nanorods for high performance supercapacitors

Abstract

Nanoarchitectured electrodes with unique morphology and excellent electrochemical performance have always been the order of the day in supercapacitor domain. Indeed, the electrode is the key component in supercapacitor assembly which providing plenty of charges which interact with convening electrolyte. In this perspective, an effective and innovative electrode by the union of gadolinium oxide nanorods (for energy source) and copper sulfide nanoflakes (for power source-excellent conductivity) are done with simple chemistry approach. The as-synthesized electrode possesses admirable rate performance (367 F g−1) and excellent cycle life (85.7% over 7500 cycles of charge/discharges) which could be attributed to the presence of distinctive morphology. Also, asymmetric supercapacitor utilizing gadolinium oxide/copper sulfide nanorod (GCN) electrodes and sp2 hybridized carbon nanosheet (graphene) are utilized with polypropylene as a separator cum charge reservoir. The fabricated two electrode cell provides ultra-high energy density of 30 W h kg−1 with a maximum power density of 1440 W kg−1. The predominant features engaged with the fabricated device will create a landmark in supercapacitor gallery.