Carbon nanotubes decorated NiSe2 nanosheets for high-performance supercapacitors

Mixed Cu2Se Hexagonal Nanosheets@Co3Se4 Nanospheres for High‐Performance Asymmetric Supercapacitors

“…Even at a higher power density of 7.50 kW kg −1 , an energy density of 21.0 Wh kg −1 is still retained. The performance of the as‐assembled ASC is superior to the similar ASC devices in previous report, such as Zn−Co‐Se//Graphene (16.97 Wh kg −1 at 0.54 kW kg −1 ), [33] Ni@Ni 0.8 Co 0.2 Se//AC (17 Wh kg −1 at 1.53 kW kg −1 ), [34] NiSe 2 @CNT//AC (25.61 Wh kg −1 at 0.81 kW kg −1 ), [35] and NiCo 2 Se 4 //AC (25 Wh kg −1 at 0.49 kW kg −1 ) [36] . These above‐mentioned results thus suggest that the Cu 2 Se@Co 3 Se 4 is a promising electrode material for high‐performance supercapacitors.…”

Synthesis of bimetallic nickel cobalt selenide particles for high-performance hybrid supercapacitors

“…By comparison, the specific energy/power densities of our constructed Ni 0.95 Co 2.05 Se 4 //AC HSC is no less than or even better than the previous related ASC devices. The corresponding devices are NiSe–Se@NF//AC@Ni (29.9 W h kg −1 at 594.46 W kg −1 ), 41 NCS/NGF//AC (36.8 W h kg −1 at 375 W kg −1 ), 42 NiSe@MoSe 2 //N-PMCN (32.6 W h kg −1 at 415 W kg −1 ), 43 Ni 0.85 Se@MoSe 2 //GNS (25.5 W h kg −1 at 420 W kg −1 ), 44 Ni 3 Se 2 -24//AC (22.3 W h Kg −1 at 160.4 W kg −1 ), 32 NiSe 2 @CNT//AC (25.61 W h kg −1 at 810 W kg −1 ), 45 NiCo 2 O 4 @Ni 0.85 Se//AC (29.3 W h kg −1 at 799 W kg −1 ), 46 Ni 3 Se 2 3D HMNN//AC (38.4 W h kg −1 at 794.5 W kg −1 ). 37 These above results suggest that the Ni 0.95 Co 2.05 Se 4 //C device possesses remarkable energy storage capability and cycling stability, which demonstrate greatly practical applications in energy storage devices.…”

Investigation of the potassium‐ion storage mechanism of nickel selenide materials and rational design of nickel selenide‐C yolk‐shell structure for enhancing electrochemical properties

“…38 The Se 3d spectrum in Figure 6B exhibits two main peaks at 54.0 and 54.9 eV, which can be assigned to Se 3d 5/2 and Se 3d 3/2 , respectively, demonstrating the formation of nickel selenide. 39 Additionally, the small peak at 58.3 eV was related to the nickel selenite phase. 40 The C 1s spectrum could be fitted to several peaks at 284.0, 284.6, 285.6, and 288.5 eV, which were assigned to C═C, C C,C O, and O C═O bonds, respectively, as displayed in Figure 6C.…”