فهرست نشریات علمی دسترسی آزاد ایران

Various fabrication methods along with many materials are extensively investigated to produce sustainable energy saving devices. Supercapacitors play a key role in achieving this goal. Their ability to store and release energy rapidly makes them highly attractive for development. In this study, we employed a simple, cost-effective method using both symmetric and asymmetric sandwich-type graphene-based supercapacitors incorporating Ni particles as active material components to enhance energy-related properties. Based on our results, laser reduced graphene oxide electrodes combined with Ni coated carbon fiber electrodes improve the electrochemical performance of the fabricated supercapacitors. Symmetric Ni//Ni cells exhibited a notable specific capacitance of 388 mF cm⁻² while the asymmetric LRGO//Ni cells retained 86% of their initial capacitance after 500 cycles. The maximum energy density was 12.7, 14.1 and 37.0 μWh cm-2 for the assembled SC with LrGO//LrGO, LrGO//Ni, and Ni//Ni flexible electrodes, respectively.