Hybridization and pore engineering for achieving high-performance lithium storage of carbide as anode material

Carbon-Anchored MnO Nanosheets as an Anode for High-Rate and Long-Life Lithium-Ion Batteries

“…Cyclic voltammetry (CV) measurement was carried out on a CHI-760E electrochemical workstation at a scanning rate of 0.1 mV s -1 with a potential window between 0.01 and 3 V. The impendence spectra were acquired by applying a sine wave with amplitude of 5 mV over the frequency range from 100 [28][29][30][31] The freeze-drying process introduced in our experiments can prevent the re-aggregation of F127 micelles, and thus the cross-linked structure between F127 monomers was maintained effectively, which may contribute to the final sheet morphology Figure S1, Supporting Information). Then, the cross-linked F127 with well-dispersed structure was in stiu carbonizated into carbon sheets at a high temperature of 700 °C under N 2 atmosphere.…”

“…24 This interaction will be beneficial for the well anchoring of MnO NSs on the carbon sheets, thus exerting positive effect on its electrochemical performance. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 10 between small-sized MnO and carbon sheet not only reduces the migration and aggregation of MnO and maintains more active sites, 24,30 but also leads to good electrical connection between them, both of which would have positive effects on electrochemical performance of MnO/C hybrid. 37 In addition, the firm connection can also alleviate the volume change during cycling and facilitate the stabilization of SEI film on the MnO surface.…”

Nano‐confined Mo2C Particles Embedded in a Porous Carbon Matrix: A Promising Anode for Ultra‐stable Na Storage

“…Figure a shows the cyclic voltammetry (CV) profiles of the initial five at a scan rate of 0.1 mV s −1 between 0.01 and 2.50 V (vs Na/Na + ). During the first scan, the broad irreversible peak from 1.4 V to 0.7 V may originate from the decomposition of the electrolyte and the solid electrolyte interface (SEI) films formation . At the subsequent scans, a pair of apparent oxidation/reduction peak of 0.74 V/0.28 V keep steady in their shapes and intensities, relating to the electrochemical process about the sodium storage mechanism of Mo 2 C can be written as followed Equation : …”

Mo2C and Its Composites Derived from Egg White for Hydrogen Evolution Reaction at All pH Range

“…The high‐resolution TEM (HRTEM) image (Figure d ) reveals well‐resolved lattice fringes with interplanar distance of 0.23 nm, corresponding to the d ‐spacing of the (121) plane of Mo 2 C. Figure e and 1 f show the high‐resolution Mo 3d and C 1s X‐ray photoelectron spectroscopy (XPS) spectra of Mo 0.08 EW, respectively. The peaks located at binding energy 228.9 and 233.0 eV can be ascribed to Mo 2+ , which corresponded to Mo 2 C. Those at 235.9, 232.1 and 230.1 eV can be assigned to MoO x mainly derived from the surface oxidation of Mo 2 C due to air contact ,,. C 1s peaks (Figure f ) at 284.3 eV can be assigned to carbidic carbon and the peak at 284.9 eV is related to the C−C sp 2 bonding, while the peaks at 286.3 and 288.9 eV can be ascribed to carbon atoms bonded to oxygen atoms ,,.…”