Highly defective 1T-MoS2 nanosheets on 3D reduced graphene oxide networks for supercapacitors

Direct synthesis of metastable phases of 2D transition metal dichalcogenides

“…R. Naz et al have reported on highly defective MoS 2 nanosheets grown on reduced graphene oxide framework achieving high gravimetric capacitance of 442 F g À1 (at 1 A g À1 ) in aqueous electrolyte (1 M H 2 SO 4 ) with capacitance retention of over 84% during 3000 cycles. 230 Furthermore, 1T phase MoS 2 nanosheets grown through a magneto-hydrothermal reaction deliver a gravimetric capacitance of 379 F g À1 (at 1 A g À1 ) in 1 M Li 2 SO 4 and show an exceptionally high stability (nearly 100%) over 10 000 cycles. 231 Based on first-principle calculations, 1T MoS 2 monolayers have been identified as a suitable anode material for lithiumion batteries due to their ability to absorb Li ions at high concentrations without aggregation.…”

One‐Pot Hydrothermal Synthesis of Ternary 1T‐MoS2/Hexa‐WO3/Graphene Composites for High‐Performance Supercapacitors

“…The sharp diffractions of the (0 0 2), (1 0 0), (1 0 3), and (1 1 0) planes in the M‐rGO composite suggest the presence of MoS 2 . The shifting of the (0 0 2) peak for the M‐rGO and M‐W‐rGO composites to lower angles compared with bulk 2H‐MoS 2 (14.3°) confirms the presence of 1T‐MoS 2 (Figure b) . The characteristic diffractions of the (1 0 0), (0 0 1), (1 1 0), (2 0 0), (1 0 1), (1 1 1), (2 0 1), (2 2 0), and (2 0 2) planes in the W‐rGO composite confirm the presence of hexa‐WO 3 (Figure c) .…”

“…[43] The element mapping analysis( Figure 1d)a nd energy-dispersive X-ray spectroscopy (EDS, Figure S3 (Figure 2b). [44,45] The characteristic diffractions of the (1 00), (0 01), (110), (2 00), (1 01), (111), (2 01), (2 20), and (2 02)p lanes in the W-rGO composite confirm the presence of hexa-WO 3 (Figure 2c). [18] In hexa-WO 3 ,t ungsten atoms of (0 01)p lanes are present at the nodes of the hexagonal lattice.…”

Nanoporous Carbon Derived from Green Material by an Ordered Activation Method and Its High Capacitance for Energy Storage

“…As shown in Figure 4 d, two main peaks are obvious: the D (defect) peak at ~1353 cm −1 and G (graphite) peak at ~1588 cm −1 [ 59 ]. The intensity ratio I D /I G of AAWHC (1.01) is higher than that of WHC (0.88) and AWHC (0.93), indicating that AAWHC samples contain more edges and defect sites, which are beneficial for electrochemical reactions [ 60 , 61 ].…”