A 3D flower-like CoNi2S4/carbon nanotube nanosheet arrays grown on Ni foam as a binder-free electrode for asymmetric supercapacitors

Construction of CoMo2S4 Nanorods/Nanosheets Electrodes with Enhanced Electrochemical Properties for Asymmetric Pseudocapacitors

“…The binding energies seated at 778.6 and 793.7 eV were attributed to Co 3 + , while the binding energies located at 779.8 and 795.1 eV were assigned to Co 2 + . [17,31] A similar situation was also observed in the Co 2p spectrum of CMO (Figure S2b), indicating that the Co element in the samples both before and after vulcanization existed in the form of Co 2 + and Co 3 + . Figure 3c shows the high-resolution spectra of Mo 3d.…”

“…Most studies focused on NiCo 2 S 4 , CoNi 2 S 4 or CuCo 2 S 4 materials for high storage SCs, and few reports on Co-Mo-S (CMS) BTMSs. [16][17][18] CMS consists of [MoS 2 ] layers of edge-sharing octahedral and is separated by a layer in which Co 2 + is occupied in half cation sites. [19] The structure is conducive to the insertion/extraction of metal ions, and the electronic conductivity of Mo is higher than that of Ni.…”

Controllable synthesis of spherical S@CoMn2O4 battery-type electrode material for hybrid supercapacitors

“…So, one of the most common strategies is to convert bimetallic oxides into bimetallic sul des. Yang et al [27] developed a ower-like CoNi 2 S 4 composite electrode material, and its C s showed 5.65 C cm − 2 at 10 mA cm − 2 . The MnCo 2 S 4 synthesized by Mola et al shows a C s of 779 F g − 1 at a CD of 1 A g − 1 [28].…”

The synthesis of Ni/Mn hexacyanoferrate microcubes and nanorods for high‐performance asymmetric supercapacitor in neutral electrolyte

“…Because of the rich valence states of transition metals (TM), the oxides, 4‐6,9‐11 sulfides, 12‐16 hydroxides 17‐26 of transition metals, and their numerous composites have been widely investigated as the supercapacitor electrode materials of faradic supercapacitor. Recently, the application of transition metal hexacyanoferrates (TM‐HCFs) as the electroactive materials of supercapacitor has also been investigated by many researchers due to their excellent redox reversibility, high ionic conductivity, superior environmental benignancy, low cost, and insolubility upon oxidation/reduction 27‐52 .…”

“…The enhanced performance of asymmetric supercapacitors is due to the combination of intercalation/deintercalation occurring at the battery-type electrode and the electrostatic absorption/ desorption occurring at the capacitive-type electrode, which enlarges the operating voltage window and subsequently increases the energy density of the device. 10 Because of the rich valence states of transition metals (TM), the oxides, [4][5][6][9][10][11] sulfides, [12][13][14][15][16] hydroxides [17][18][19][20][21][22][23][24][25][26] of transition metals, and their numerous composites have been widely investigated as the supercapacitor electrode materials of faradic supercapacitor. Recently, the application of transition metal hexacyanoferrates (TM-HCFs) as the electroactive materials of supercapacitor has also been investigated by many researchers due to their excellent redox reversibility, high ionic conductivity, superior environmental benignancy, low cost, and insolubility upon oxidation/reduction.…”