C3N4-digested Intercalation MoS2 Nano-flowers with Expanded Interlayer Spacing towards High-performance Rechargeable Zinc-Ion Batteries

Molybdenum disulfide (MoS2) materials are very competitive cathode materials for aqueous zinc-ion batteries (AZIBs) due to their sandwich structure, large surface area and low cost. Also, the inherent low capacity and high energy barrier limit its further development. Here, the C3N4-digested intercalation MoS2 (MSCN) has been achieved via a hydrothermal strategy by using g-C3N4 nanosheets as a self-sacrificial template. The introduction of g-C3N4 greatly improves the MoS2 conductivity, which further enhances the Zn2+ diffusion dynamics, and succeeds in increasing the spacing between the layers. With a discharge capacity of 168 mAh g-1 at 5 A g-1, Zn-ion batteries based on the MSCN cathode assembly exhibit good cycle stability and excellent rate performance, under the same current density circulation capacity remain a rate of 92.9% after 1000 cycles. And beyond that, flexible quasi-solid ZIBs with MSCN cathodes which have good Zn2+ storage properties and promising for future applications. The research in this article is of great significance for the design and development of AZIBs layered transition metal sulfide cathodes.