Construction of CoNi2S4/nitrogen-doped lignite-based porous carbon composites and their application in supercapacitors

Recent advances in Ni-materials/carbon nanocomposites for supercapacitor electrodes

“…Table 3 166–181 demonstrates that supercapacitor electrodes based on a combination of Ni materials and porous carbon materials are widely used to enhance energy storage applications. Porous carbon, such as activated carbon or carbon nanotubes, provides a large surface area for electrochemical reactions and ion adsorption.…”

“…The supercapacitor of CoNi 2 S 4 /NPC (cathode)//AC (anode) demonstrated an energy density of 48.58 W h kg −1 and power density of 400 W kg −1 , with a capacitance retention of 82.42% after 5000 cycles. 168 Wang et al 169 synthesized the composites of NiCo 2 O 4 -4 x nanowires (O vacancies-rich)/porous carbon (derived from discarded cigarette ash) named Ov-NCO/PC-Y resulting in a superior specific capacitance of 1002.2 F g −1 . Moreover, the Ov-NCO/PC-0.1//AC-based supercapacitor delivered an elevated energy density.…”