Lamellar MoSe₂nanosheets embedded with MoO₂nanoparticles: novel hybrid nanostructures promoted excellent performances for lithium ion batteries

Abstract

A carbon-free nanocomposite consisting of MoO nanoparticles embedded between MoSe nanosheets, named MoO@MoSe, has been synthesized and demonstrated excellent electrochemical properties for lithium ion batteries. In such a composite, MoSe nanosheets provide a flexible substrate for MoO nanoparticles; while MoO nanoparticles act as spacers to retain the desired active surface to electrolyte and also introduce metallic conduction. In addition, the heterojunctions at the interface between MoSe and MoO introduce a self-built electric field to promote the lithiation/delithiation process. As a result, such lamellar composite has a long cycling stability with a reversible capacity of 520.4 mA h g at a current density of 2000 mA g after 400 cycles and excellent rate performance, which are attributed to the synergistic combination of the two components in nanoscale.

Edge‐Riched MoSe2/MoO2 Hybrid Electrocatalyst for Efficient Hydrogen Evolution Reaction

“…XPS is employed to measure the chemical states of Mo, Se, and O elements in MoSe 2 /MoO 2 . Mo 3d core‐level spectrum consists of four peaks at 232.3, 229.2, 228.6, and 231.7 eV (Figure c), which can be assigned to Mo 3d 3/2 and 3d 5/2 of MoO 2 and MoSe 2 , indicating the presence of MoO 2 and MoSe 2 after the selenization . The O 1s XPS peak (Figure d) at 530.4 eV corresponds to MoO 2 in Mo (IV) O bonds, which proves that MoO 2 have not been completely selenized.…”

Facile Synthesis of Ultra‐Small Few‐Layer Nanostructured MoSe2 Embedded on N, P Co‐Doped Bio‐Carbon for High‐Performance Half/Full Sodium‐Ion and Potassium‐Ion Batteries

“…In the last few decades, by virtue of their high security, capability of storing clean energy, and providing a stable power supply, commercialized lithium‐ion batteries (LIBs) have come to dominate the energy storage market from portable electronic devices to electrical vehicles . However, limited Li sources and exorbitant prices have hampered their sustainable development . Therefore, sodium‐ion batteries (SIBs) and potassium‐ion batteries (PIBs), with analogical energy storage behavior to LIBs, have sparked significant attention and are considered as promising alternatives to LIBs, ascribed to their competitive cost, appropriate redox potential, along with inexhaustible sodium/potassium reserves, which can be more able to meet the urgent demands of large‐scale energy storage markets .…”

Novel 2D Layered Molybdenum Ditelluride Encapsulated in Few‐Layer Graphene as High‐Performance Anode for Lithium‐Ion Batteries

“…For instance, Fu and co‐workers reported that the vertical ReS 2 nanowalls on 3D graphene foam showed the first charge (Li + extraction) capacity of 640 mAh g −1 and maintained a capacity of 365 mAh g −1 after 100 cycles at a current density of 1 A g −1 . Cao and co‐workers reported that MoSe 2 nanosheets can provide a flexible substrate for MoO 2 nanoparticles, leading to a reversible capacity of 520.4 mAh g −1 at a current density of 2000 mA g −1 after 400 cycles …”