Fabrication of 1.6V hybrid supercapacitor developed using MnSe2/rGO positive electrode and phosphine based covalent organic frameworks as a negative electrode enables superb stability up to 28,000 cycles

Iron-selenide-based titanium dioxide nanocomposites as a novel electrode material for asymmetric supercapacitors operating at 2.3 V

“…The constructed electrodes' specific capacitance, specific power, and specific energy were calculated using eqn (2)–(4) (see ESI in ref. 38 ).…”

“…Additionally, transition metal selenides have been reported to display remarkable durability without the formation of polyselenide during redox reactions in the electrochemical process. 37 Many literature reports, e.g., MnSe/ MnSe 2 , 14,38 NiSe 2 , 39 and CuSe, 40,41 demonstrated attractive electrode materials with remarkable performance. Among these appealing compounds, iron selenide (symbolized as FeSe 2 ) is a p-type semiconductor with a quiet narrow bandgap energy of (1.0 eV), one of the most appealing candidates for supercapacitors owing to its fascinating features, such as high theoretical capacity, high adsorption coefficient and fast electron transfer applied in batteries, solar cells, [42][43][44] and rarely reported for supercapacitors.…”

Boosting the electrochemical performance of ZnO nanomaterials through a conductive CuS matrix for aqueous supercapacitors

“…[4][5][6] Currently, supercapacitors (SCs) have shown the desired application outlook in the field of energy storage for their better power density, excellent cycle stability, high-speed charge/discharge rate, low maintenance costs, and the fact that they are highly safe compared to other energy storage devices such as lithium-ion batteries and fuel cells. [7][8][9] The electrochemical properties of a SC mainly depend on its electrode material. [10][11][12][13][14][15][16] Therefore, preparing electrode materials with excellent electrochemical properties is the key to improving SC application performance.…”

Mixed metal chalcogenide shell with carbon interlayer wrapped 3D NiCo 2 O 4 nanowire array: A hierarchical self‐supported electrode for high‐performance supercapacitors

“…In particular, TM selenides have attracted attention as positive electrodes in HSCs because they show high ionic/electronic conductivity and good cyclic stability compared to other TM components (eg, hydroxides, oxides, and sulfides). Metal‐rich selenides exhibit high capacitive performance through metalloid characteristics on the metal sublattice of selenides induced by strong electron delocalization 22,23 …”

“…Metal-rich selenides exhibit high capacitive performance through metalloid characteristics on the metal sublattice of selenides induced by strong electron delocalization. 22,23 Even though TM selenides have a promising theoretical capacity, their practical application has been hindered by the obstacles of poor capacity retention and unfavorable reaction kinetics, which initiate the fabrication strategy of hybrid electrodes with advanced architectural morphologies. 24,25 To improve the reaction kinetics and capacity retention, recent research has focused on the high stable microstructures with heterostructure composite features of electrode materials, which induce buffering functionalities to enhance the electrochemical properties and provide a pathway to achieve high-performing SCs.…”