Novel Lithium-Ion Capacitor Based on a NiO-rGO Composite

Abstract

Lithium-ion capacitors (LICs) have been widely explored for energy storage. Nevertheless, achieving good energy density, satisfactory power density, and stable cycle life is still challenging. For this study, we fabricated a novel LIC with a NiO-rGO composite as a negative material and commercial activated carbon (AC) as a positive material for energy storage. The NiO-rGO//AC system utilizes NiO nanoparticles uniformly distributed in rGO to achieve a high specific capacity (with a current density of 0.5 A g−1 and a charge capacity of 945.8 mA h g−1) and uses AC to provide a large specific surface area and adjustable pore structure, thereby achieving excellent electrochemical performance. In detail, the NiO-rGO//AC system (with a mass ratio of 1:3) can achieve a high energy density (98.15 W h kg−1), a high power density (10.94 kW kg−1), and a long cycle life (with 72.1% capacity retention after 10,000 cycles). This study outlines a new option for the manufacture of LIC devices that feature both high energy and high power densities.

Sea Urchin-Like NiO-CoO Heterostructure as High-Energy Supercapattery Electrode: Laboratory Prototype to Field Application of Pouch-type Device

“…Table shows the comparison of the Li-ion supercapattery performances reported for the single oxide-based supercapacitor and the present work. It is seen that energy density in the range of 90–140 W h kg –1 and power density in the range of 98–1390 W kg –1 are represented in the literature. − In the present work, high specific energy of 212 W h kg –1 at a specific power of 529 W kg –1 was obtained. Further, the non-aqueous device underwent rate capability assessment at various current densities the same as before, and the corresponding specific capacities were determined using eq .…”

NiO/MnO2 nanocomposite in addition of layered Reduced Graphene oxide (RGO) electrode for accountable supercapacitor application

“…Geerthana Mummoorthi et al, researched that the ternary composite α-Fe 2 O 3 /NiO/rGO has shown a specific capacitance of 747 F/g@ a current density of 1 A /g in a 6 M KOH [14]. Qi An et al, prepared NiO-rGO, NiO nanoparticles uniformly distributed in rGO to achieve a high specific capacity at current density of 0.5 A /g [15].O. C. Pore et.al., synthesised NiO/rGO composite achieved the highest specific capacitance of 727.1 F/g at 1 mA cm −2 current density and showed good cyclic stability of about 80.4% over 9000 cycles [16].…”