Tailored nanoscale interface in a hierarchical carbon nanotube supported MoS₂@MoO₂-C electrode toward high performance sodium ion storage

Abstract

A MoS2/MoO2 heterointerface is created, with MoO2 nanocrystals anchored on MoS2 nanosheets, assisted by an N-doped carbon protecting layer, on CNTs. The electrode has a high specific capacity of ∼700 mA h g−1 at 0.2 A g−1, excellent cycling stability and rate capability.

Novel synthetic strategy for a nanostructured metal hydroxysulfide‐C and its initial electrochemical investigation as a new anode material for potassium‐ion batteries

“…Furthermore, the formation of a heterointerface prevented the aggregation of nanocrystals during the phase transition during the repeated discharge-charge process, resulting in the maintenance of a stable structure. 6,8,49,50 In addition to its remarkable cycling performance, Co(OH)S@C exhibited a high rate capability compared to b-Co(OH)S@ at various current rates. The Co(OH)S@C electrode exhibited high reversible capacities of 372.6, 344.2, 297.2, 257.6, 224.2, 190.3, 164.1, and 138.0 mA h g À1 at 0.1, 0.2, 0.5, 1.0, 2.0, 3.0, 4.0, and 5.0 A g À1 , respectively.…”

Energy Storage Mechanism, Challenge and Design Strategies of Metal Sulfides for Rechargeable Sodium/Potassium‐Ion Batteries

“…created the 3D nanoarchitecture with the N‐doped carbon layer anchoring MoS 2 ultrathin nanosheets decorated with MoO 2 ultrafine nanocrystals on flexible carbon nanotubes (CNTs) (CNT‐MoS 2 @MoO 2 ‐C, in Figure 10e–h) by the hydrothermal, polymerization, and calcination processes, where the heterointerface between MoS 2 and MoO 2 could supply extra active sites for the charge transfer (Figure 10i) as well as the N‐doped carbon and CNTs could improve the ion and electron transport, and strengthen the structural robustness. [ 108 ] Therefore, this CNT‐MoS 2 @MoO 2 ‐C electrode maintains larger discharge capacities than those of CNT‐MoS 2 (Figure 10j). Luo et al.…”

“…Reproduced with permission. [ 108 ] Copyright 2020, The Royal Society of Chemistry. k) Structure model and l) SEM images of Bi 2 S 3 /Bi 2 O 3 heterostructure.…”

The Multicomponent Synergistic Effect of Sandwich Structure Hierarchical Nanofibers for Enhanced Sodium Storage

“…Heterostructures are generally composed of coupling components with different energy bands, electrons are transferred from the side with the higher Fermi level to the lower, obvious positive and negative charge regions at the phase interfaces are formed, thus, the interface reaction and carrier diffusion kinetics are promoted. [2,18,19] A novel designed MnS-MoS 2 heterostructure obtained by Chen et al [20] exhibit excellent cycle and rate capability for LIBs/ SIBs. The heterostructure can enhance the diffusion kinetics of Li + /Na + and buffer the volume expansion because of the phase transition and built-in electric field.…”