One-step solvothermal synthesis of nickel selenide nanoparticles as the electrode for high-performance supercapacitors

Fabrication of rGO/SrSeO4 nanocomposite as an electrode material with enhanced specific power for supercapacitor applications

“…It is also evident from the voltammograms that redox peaks appear even at higher scan rates, i.e. 50 mVs −1 which affirms the good electrochemical reversibility of rGO/ SrSeO 4 composite in aqueous KOH electrolyte [54].…”

One-Dimensional NiSe–Se Hollow Nanotubular Architecture as a Binder-Free Cathode with Enhanced Redox Reactions for High-Performance Hybrid Supercapacitors

“…Even with higher current density of 10 mA cm –2 , the device showed an energy density of 21.89 W h kg –1 at a power density of 1542.52 W kg –1 . The attained values were higher than most NiSe-based HSCs such as Ni 0.9 Co 1.92 Se 4 //AC, CQD’s/MoS 2 /NiSe 2 //AC, Ni 3 Se 2 //AC, Ni 0.85 Se//AC, Ni 0.85 Se nanoparticles//AC, Ni@Ni 0.8 Co 0.2 Se//AC, NiCoSe spheres//AC, NiSe 0.85 @MoSe 2 //GNS, and NiCoSe//RGO…”

Hydrothermal Synthesis of Nanoflake-Assembled (Ni0.5Co0.5)0.85Se Microspheres as the Cathode and Reduced Graphene Oxide/Porous Fe2O3 Nanospheres Composite as the Anode for Novel Alkaline Aqueous Batteries

“…As exhibited in the Ragone plot (Figure f), the fabricated alkaline aqueous battery manifests a large specific energy of 37.2 W h kg –1 at 500 W kg –1 , and it maintains a decent specific energy of 11.9 W h kg –1 at 10 kW kg –1 . Notably, the highest specific energy of the assembled (Ni 0.5 Co 0.5 ) 0.85 Se//rGO/Fe 2 O 3 alkaline aqueous battery in the present study is larger than that of several previously explored alkaline aqueous energy storage systems, including CoSe//AC (18.6 W h kg –1 at 750 W kg –1 ), CuCo 2 O 4 /CuO//rGO/Fe 2 O 3 (33 W h kg –1 at 200 W kg –1 ), Ni 0.85 Se@MoSe 2 //GNS (25.5 W h kg –1 at 420 W kg –1 ), NiCo 2 O 4 /NiO//Fe 2 O 3 (19 W h kg –1 at 157 W kg –1 ), Ni 0.85 Se//AC (22.3 W h kg –1 at 829 W kg –1 ), NiCo 2 O 4 /CQDs//AC (27.8 W h kg –1 at 128 W kg –1 ), NiCo 2 O 4 //FeSe 2 (22.4 W h kg –1 at 163 W kg –1 ), NiCo 2 S 4 @PPy/NF//AC (34.62 W h kg –1 at 120.19 W kg –1 ), and NiSe@MoSe 2 //N-PMCN (32.6 W h kg –1 at 415 W kg –1 ) . As demonstrated in Figure g, the cycle stability of the (Ni 0.5 Co 0.5 ) 0.85 Se//rGO/Fe 2 O 3 alkaline aqueous battery was investigated at 3 A g –1 for 2000 cycles, and 84.5% of capacity retention was maintained, which indicated good cycle stability, showing the great potential for practical applications.…”