Molybdenum disulfide (MoS 2 ) has been considered to be a promising anode material for sodium ion batteries (SIBs), because of its high capacity and graphene-like layered structure. However, irreversible conversion reaction during the sodiation/desodiation process is a major problem that must be overcome before its practical applications. In this work, MoS 2 /amorphous carbon (C) microtubes (MTs) composed of heterostructured MoS 2 /C nanosheets have been developed via a simple template method. The existence of MoS 2 /C heterointerface plays a key role in achieving high and stable performance by stabilizing the reaction products Mo and sulfide phases, providing fast electronic and Na + ions diffusion mobility, and alleviating the volume change. MoS 2 /C MTs exhibit a high reversible specific capacity of 563.5 mA h g −1 at 0.2 A g −1 , good rate performance (520.5, 489.4, 452.9, 425.1, and 401.3 mA h g −1 at 0.5, 1.0, 2.0, 5.0, and 10.0 A g −1 , respectively), and excellent cycling stability (484.9 mA h g −1 at 2.0 A g −1 after 1500 cycles).

In article number 2000717, Qiaobao Zhang, Chenghao Yang, Jun Lu and co‐workers demonstrate that the strategy of interfacial engineering via surface‐amorphization of VO2 (B) nanorods results in the formation of a crystalline core/amorphous shell heterostructure. This design enables superior potassium‐ion storage performance in terms of large capacity, outstanding rate capability and long cycle stability when employed as an anode for potassium‐ion batteries.

Sodium-ion batteries (SIBs) have been regarded as a promising alternative to lithium-ion batteries due to the natural abundance of sodium in the earth's crust. In our work, fusiform Fe 7 X 8 @C (X = S, Se) composites were obtained via a one-step pyrolysis strategy applied to SIB anode materials. The formed carbon skeleton could prevent the Fe 7 X 8 nanoparticles from agglomeration and stabilize the interface of Fe/Na 2 X generated in the redox reactions. Fe 7 X 8 @C (X = S, Se) exhibits excellent reversible specific capacity (1005.3 mAh g −1 under 0.2 A g −1 for Fe 7 S 8 @C and 458.5 mAh g −1 under 0.5 A g −1 for Fe 7 Se 8 @C), outstanding rate performance (654.7 mAh g −1 for Fe 7 S 8 @C and 392.9 mAh g −1 for Fe 7 Se 8 @C going through 300 loops even under 2 A g −1 ), and excellent cycling properties (795.8 mAh g −1 after 50 loops under 0.2 A g −1 for Fe7S 8 @C and 399.9 mAh g −1 going through 150 loops under 0.5 A g −1 for Fe 7 Se 8 @C). The excellent electrochemical performance of Fe 7 X 8 @C composites makes them promising anode materials for SIBs.