Microwave heating followed by a solvothermal method to synthesize nickel–cobalt selenide/rGO for high-performance supercapacitors

Abstract

Transition metal selenides, a new type of electrode materials for electrochemical capacitors attract a great many attentions because of their superior capacitive performance, notable electrical conductivity, and abundant reserves. A...

Enhancement of the capacitive performance of Ni2CoS4 by incorporation of graphitized carbon dots

“…8(b), and its R s , R ct , and Z w values have very tiny changes, which may be caused by some irreversible changes in Ni 2 CoS 4 / GCDs-9 during the cycling test such as slight agglomeration of Ni 2 CoS 4 particles. 53 Correspondingly, the energy density and power density of the AC||Ni 2 CoS 4 /GCDs-9 asymmetric supercapacitor based on active materials of the anode and the cathode were calculated using formulas (3) and ( 4). An energy density of 57.3 W h kg À1 is achieved at a power density of 491.4 W kg À1 and a power density of 8088.2 W kg À1 can be obtained at an energy density of 30.6 W h kg À1 , as shown in Fig.…”

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

“…The (Ni 0.85 Se) 3 (Co 0.85 Se)/rGO//AC supercapacitor exhibited a high energy density. 106 Ni/Co selenide/GO (NiCoSe/G) was synthesized using a water bath and selenization process and the optimized electrode (NiCoSe/G-10) exhibited a high specific capacity and an excellent cycling performance as well as a high performance of NPC//NiCoSe/G-10 supercapacitor as tabulated in Table 1. 107…”

Advances in Nickel-cobalt Electrode Materials for Supercapacitors

“…The results show that Ni-Co-Se@C-CNT exhibits a high specific capacity of 554.1 F g -1 (1108.2 F g -1 ) at 1 A g -1 , and has excellent cycling performance, that is, 96.4% of the initial capacity is still maintained after 5000 cycles at 10 A g -1 . In addition, Zhou, TL [41] synthesized (Ni0.85Se)3(Co0.85Se)/ reduced graphene oxide (rGO) composites by simple and efficient microwave heating and solvothermal method. It can be observed that (Ni0.85Se)3(Co0.85Se)/ reduced graphene oxide presents a three-dimensional porous structure composed of stacked nanorods.…”