Fabricated a Novel and High Capacitance Symmetric SupercapsitorElectrode by Electrosynthesis NiCo LDH@Vertical Oriented Graphen Sheetson Graphite Sheet

Supercapacitors are energy storage devices that have gained significant attention due to theirhigh power density and long cycle life. The performance of supercapacitors is largely dependenton the properties of their electrodes[۱]. NiCo LDH/VOGN/Graphite sheet electrode with very highsurface area and excellent capacitive behavior was fabricated through the anodizing of the graphitefollowed by electrodeposition[۲]. In this study, fabricated a novel electrode-based graphite sheetwas anodized to increase its porosity and conductivity for the fabrication of Vertically OrientedGraphene Nanosheets (VOGN) that were covered by NiCo Layer double hydroxide (NiCo LDH)nanoparticles.[۳] NiCo LDH was deposited onto the VOGN using an electrosynthesis method. Theprepared electrodes were investigated by Fourier transform infrared (FT-IR), scanning electronmicroscopy (SEM), and BET (Brunauer–Emmett–Teller). The nanoarray structure can provide alarge specific surface area and more channels, which facilitate rapid ion transfer and electronmigration between electrolyte and electrode. The effect of anodizing graphite sheets and differentratios of Co and Ni on the electrochemical performance was investigated. It has been found thatanodizing graphite sheets on the one hand increase the conductivity of the electrode, on the otherhand, it provides more active sites for NiCo LDH attachment[۴]. The resulting electrode exhibitedexcellent electrochemical performance, with high specific capacitance and good cycling stability.This approach provides a promising strategy for developing high-performance supercapacitorelectrodes with enhanced porosity and surface area. The NiCo LDH/VOGN/Graphite sheetelectrodes showed a very high capacitance of about ۹۴۳ F g−۱ at a current density of ۱ A g−۱, anexcellent energy density of ۶۸.۴ mWh g−۱, the power density of ۱۴۹۶.۴ mW g−۱, and stable capacityof about ۸۵.۶% after ۵,۰۰۰ cycles in the charge/discharge process.

Keywords:

Supercapacitor , NiCo LDH , Vertically Oriented Graphene Nanosheets , Graphite sheetAnodizing