Superior cycling performance of NiC2O4/rGO/NF composites for hybrid supercapacitors

In the energy storage systems, hybrid supercapacitor has a promising in the future, making up performance disparity between traditional capacitors and lithium ion batteries. In this work, a novel Nickle oxalate (NiC2O4) based composite by inducing reduced graphene oxide (rGO) and nickel foam (NF) has been constructed for battery-type supercapacitors, which exhibits significantly improved electrochemical properties. The NiC2O4/ rGO/NF (NGN) composite possesses a superior capacity of 305 mAh g-1 and better cycling stability which the specific capacitance of sample retained 91.32 % after 30,000 cycles. The NGN hybrid supercapacitors (NGN-HSC) assembled by NGN as the anode and the activated carbon (AC) as the cathode exhibits high energy density of 54.75 Wh kg-1 at 1800.05 W kg-1 power density, also outstanding cycling stability (72.07 % capacity is retained after 10,000 times). The work supplies a new approach to design electrodes with ultrahigh cycling stability.

Automated summary

In the field of energy storage systems, hybrid supercapacitors show great potential in bridging the performance gap between traditional capacitors and lithium ion batteries. A novel composite material based on Nickel oxalate (NiC2O4), reduced graphene oxide (rGO), and nickel foam (NF) has been developed for battery-type supercapacitors, which exhibits significantly improved electrochemical properties.