“Beyond conventional energy applications: Exploring the superiority of NiCu-MOF/NbS2//CNT-doped activated carbon for Supercapattery and oxygen evolution reactions”

Abstract

Numerous investigations were conducted to produce effective electrode materials for applications such as energy storage and oxygen evolution reaction (OER). Bimetallic NiCu-MOF/NbS2 was synthesized and applied in supercapattery devices in this study. The NiCu-MOF/NbS2 electrode in a three-cell investigation revealed a specific capacity (Qs) of 1507C/g at a current density of 2.0 A/g. The Brunauer-Emmett-Teller (BET) measurement indicated a high specific surface area of 46 m2/g, which causes enhancement in the electrochemical performance. The supercapattery device (NiCu-MOF/NbS2) was also built using NiCu-MOF/NbS2 with CNT@activated carbon which showed a Qs of 194C/g. It had an energy density of 83 Wh/kg and a power density of 970 W/kg. The NiCu-MOF/NbS2 device can retain 97 % capacity retention after 20,000 GCD cycles. The NiCu-MOF/NbS2 was also tested in an oxygen evolution reaction and showed the least overpotential of 175 mV composite. The NiCu-MOF/NbS2 electrode had significant potential for energy storage devices and in OER applications.