Carbon nanofiber activated by molybdenum disulfide as an effective binder‐free composite anode for highly reversible lithium storage

Abstract

Summary Carbon nanofiber film (CNF) as anode material for lithium‐ion batteries (LIBs) draws attention for its excellent cyclic stability, but its practical application is limited due to low specific capacity. Considering the advantages of pure CNF and MoS2, a flexible film which CNF covered by MoS2 (MoS2/CNF) is successfully produced and evaluated as a binder‐free electrode for LIBs without mixing with carbon black and polymer binder. MoS2 nanoflakes (8.91 wt% of the composite sample) covering on CNF (MoS2/CNF‐B sample) plays the key role in activating the electrochemical properties of CNF, but dense MoS2 nanoflakes (39.4 wt%) on CNF (MoS2/CNF‐A) seriously limit the electrochemical properties of CNF. At 0.1 and 1.0 A g−1, MoS2/CNF‐B sample delivers 967.1 and 605.7 mA h g−1, the capacities are almost twice as much as those of pure CNF. The initial columbic efficiency of MoS2/CNF‐B sample of 76.4% is much higher than that of pure CNF sample of 62.1%. Moreover, MoS2/CNF‐B sample presents no capacity decay till 100 cycles, and the cycled electrode at the 100th cycle still maintains a stable composite structure of MoS2 nanoflakes covering on CNF.

Sulphur vacancy driven phase conversion of MoS2 nanosheets for efficient photoreduction of CO2 under visible light

“…Bulk MoS 2 nanoflowers were hydrothermally synthesized on carbon nanofiber (CNF) films adapting a reported procedure. 4 SEM images show that MoS 2 nanoflowers vertically grow on carbon nanofibers using the nanofiber surface as a nucleation site (Fig. S1 in ESI†).…”

“…MoS 2 is well-known for various applications including energy storage and catalysis. 4,5 Like typical layered materials the individual sheets of MoS 2 are stacked via weak van der Waals interactions. Hence, it is possible to change its bandgap through exfoliation which in turn can increase its light absorption in the visible region.…”

Synergistic Lubrication Mechanism of Nano-Fluid and Grinding Wheel Prepared by CNTs@T304 Nano-Capsules

“…CNTs are nanotubes formed by curling flake graphite and have excellent thermal conductivity, mechanical properties, and lubrication properties [17,18]. The hollow structure allows guest molecules to enter their molecules to form nano-capsules, improving the performance of CNTs themselves [19,20]. To better lubricate the grinding area, our research group proposed to fill lubricant dibutyl phosphite (T304) into CNTs to prepare CNTs@T304 nano-capsules.…”