Flower-like manganese-cobalt oxysulfide supported on Ni foam as a novel faradaic electrode with commendable performance

Homogeneous Core/Shell NiMoO4@NiMoO4 and Activated Carbon for High Performance Asymmetric Supercapacitor

“…The maximum capacities of Electrodes I and III are much lower and can only reach 309 mA h/g (371 µA h/cm 2 ) and 324 mA h/g (453 µA h/cm 2 ), respectively, over 25% and 21% lower than that of Electrode II. Notably, the specific capacity of our homogeneous architecture here is favorably comparable with those of previously reported nanostructures, including CoMoO 4 @Co(OH) 2 core-shell structures (265 mA h/cm 2 at 2 mA/cm 2 ) [46], as well as CoMoO 4 nanoflakes (32.40 mA h/g; 492.48 µAh/cm 2 ) [47], Ni–Mo–S nanosheets (312 mA h/g at 1 mA/cm 2 ) [48], and flower-like Mn–Co oxysulfide (136 mA h/g at 2 A/g) [49]. Detailed comparisons in electrochemical performances among these devices and our structure can be found in Table S1.…”

Synthesis of a MnS/NixSy composite with nanoparticles coated on hexagonal sheet structures as an advanced electrode material for asymmetric supercapacitors

“…A series of typical anodic and cathodic peaks are visible in these CV curves, which show signicant difference in comparison with the ideal rectangular CV curves of EDLCs. 5,10 Then, the detailed CV curves of the NMS electrode are shown in Fig. 4b at different scan rates ranging from 5 to 100 mV s À1 .…”

“…[2][3][4][5][6][7][8] However, the poor energy density ($5-20 W h kg À1 ) and low potential window of electric doublelayer capacitors (EDLCs) inhibit their large-scale practical application to a great degree. [9][10][11] An efficacious way to improve this situation is to utilize battery-type electrode materials, such as Ni(OH) 2 , cobalt oxides, and suldes, as the energy source. [11][12][13] At present, metal oxides have drawn signicant attention because the reversible faradaic reaction and multiple valence state changes endow them with higher theoretical capacity.…”

Facile Synthesis of Flower-Like Copper-Cobalt Sulfide as Binder-Free Faradaic Electrodes for Supercapacitors with Improved Electrochemical Properties

“…Yu et al fabricated Ni x Co 3−x S 4 electrodes with hollow prisms microstructure via self-templating method, which exhibit high specific capacitance, desirable rate capability and good capacitance retention [26]. In our previous work, we successfully synthesized flower-like Mn–Co oxysulfide in which oxygen element in Mn–Co oxide is partially substituted by sulphur [37]. Recently, hierarchical CuCo 2 S 4 hollow nanoneedles are synthesized via template-free hydrothermal method and designed as notable high-performance electrodes with superior electrochemical performances [44].…”

“…MnCo 2 O 4 , synthesized via facile hydrothermal method, has been designed as an energy storage device which displays excellent electrochemical properties [ 28 ]. As well, ternary metal oxides with nanowires [ 29 ], nanosheets [ 30 , 31 ], hollow spheres [ 32 ], core/shell [ 25 , 32 , 33 , 34 , 35 ], and flower-like [ 36 , 37 ] structures directly arraying on Ni foam exhibit significantly enhanced electrochemical performance.…”