Synergistic innovations in energy Storage: Cu-MOF infused with CNT for supercapattery devices and hydrogen evolution reaction

Abstract

The tailoring and rational synthesis of metal–organic framework (MOF) with versatile nano/microarchitectures are of great academic interest due to their promising applications in advanced energy storage devices. A simple and cost-effective hydrothermal method was used to synthesize the carbon nanotubes (CNT) doped Cu-MOF, exhibiting astonishing power and energy density. The Brunauer-Emmett-Teller (BET) measurements were performed, which showed an enhanced surface area of 143 m2/g upon incorporation of CNT. The specific capacity of the Cu-MOF/CNT sample was increased up to 1876C/g compared to the Cu-MOF (1190C/g) and CNT (603C/g). Advance supercapattery was designed using Cu-MOF/CNT as the positive electrode while activated carbon (AC) as the negative electrode. The estimated specific capacitance of Cu-MOF/CNT//AC was 262C/g. To investigate the stability of the asymmetric device, it was subjected to 16,000 charging/discharging cycles that maintained 98.3 % its primary capacity. Consequently, the asymmetric device obtained energy and power density was 47 Wh/kg and 920 W/kg, respectively.