Sacrificial template synthesis of hollow C@MoS2@PPy nanocomposites as anodes for enhanced sodium storage performance

One-pot synthesis of hierarchical Co1–S/NC@MoS2/C hollow nanofibers based on one-dimensional metal coordination polymers for enhanced lithium and sodium-ion storage

“…5a shows the CV curves of the first three cycles over a voltage range of 0.01-3 V. During the first discharge scan, the reduction peak observed between 1.5 and 2.0 V represents the Na + insertion reaction accompanied by the generation of sodiated https://engine.scichina.com/doi/10.1016/j.scib.2020.05.006 metal sulfides [17]. The other peaks near 0.8 and 0.2 V correspond to the conversion of sodiated metal sulfides to metal and Na 2 S, and the irreversible generation of the SEI film, respectively [25]. In the initial anodic scan, there is a small peak at~2.2 V and a strong peak at 1.73 V, which are related to the formation of metal sulfides accompanied by the desodiation of Na 2 S [17].…”

“…However, their shortcomings are obvious; the carbon nanotube templates [11,22] can only provide conductive pathways with limited electrochemical activity, while the semi-conductive metal oxide templates [23,24] show opposite weaknesses, demonstrating enhanced energy storage activity with limited conductivity. Recently, Wang et al [25] used FeOOH nanowires as sacrificial templates to synthesize a C@MoS 2 @PPy nanocomposite in a cumbersome process. This necessitates the exploration of new strategies to fabricate 1D hollow nanostructures without these disadvantages.…”

General Liquid‐Driven Coaxial Flow Focusing Preparation of Novel Microcapsules for Rechargeable Magnesium Batteries

“…37-1492). [34,35] In Figure 1d and Figure S4a (Supporting Information), since the MoS 2 suspension is opaque, the collected microdroplets are black, as observed on an optical microscopy. The SEM images ( Figure S4b Figure S4c, Supporting Information), MoS 2 nanospheres encapsulated inside the capsule are observed, whereas the shell thickness of the capsule is ≈300 nm.…”

Intrinsically conducting polymers and their combinations with redox-active molecules for rechargeable battery electrodes: an update

“…MoS 2 as an attractive material for lithium (Gao et al 2020a) and sodium-ion storage in the negative electrode suffers from poor electronic conductivity and volume changes during charge/discharge. Using hollow nitrogen-doped carbon spheres as host for MoS 2 and a coating with PPy a material with a fairly stable sodium storage capability after serious losses in the initial cycles was prepared (Wang et al 2019d). MoO 3 particles employed as hosts for Al 3+ -ions in an aluminum-ion battery have been coated with PPy (Wang et al 2019e).…”