ZnS-Sb₂S₃@C Core-Double Shell Polyhedron Structure Derived from Metal–Organic Framework as Anodes for High Performance Sodium Ion Batteries

Abstract

Taking advantage of zeolitic imidazolate framework (ZIF-8), ZnS-SbS@C core-double shell polyhedron structure is synthesized through a sulfurization reaction between Zn dissociated from ZIF-8 and S from thioacetamide (TAA), and subsequently a metal cation exchange process between Zn and Sb, in which carbon layer is introduced from polymeric resorcinol-formaldehyde to prevent the collapse of the polyhedron. The polyhedron composite with a ZnS inner-core and SbS/C double-shell as anode for sodium ion batteries (SIBs) shows us a significantly improved electrochemical performance with stable cycle stability, high Coulombic efficiency and specific capacity. Peculiarly, introducing a carbon shell not only acts as an important protective layer to form a rigid construction and accommodate the volume changes, but also improves the electronic conductivity to optimize the stable cycle performance and the excellent rate property. The architecture composed of ZnS inner core and a complex SbS/C shell not only facilitates the facile electrolyte infiltration to reduce the Na-ion diffusion length to improve the electrochemical reaction kinetics, but also prevents the structure pulverization caused by Na-ion insertion/extraction. This approach to prepare metal sulfides based on MOFs can be further extended to design other nanostructured systems for high performance energy storage devices.

Highly Reversible Phase Transition Endows V6O13 with Enhanced Performance as Aqueous Zinc‐Ion Battery Cathode

“…In addition, the biphasic material may contribute to high electronic conductivity and pseudocapacitive effect, leading to the fast ion diffusion kinetics. Moreover, the biphasic material with stepwise redox reactions can effectively reduce the solid‐state diffusion and thus relieve the stress during the insertion of ions . Remarkably, many zinc vanadates were demonstrated to exhibit superior electrochemical behavior as aqueous ZIB cathodes, especially the Zn 0.25 V 2 O 5 · n H 2 O material reported by Nazar and co‐workers, whose study revealed that Zn 0.25 V 2 O 5 · n H 2 O can perform at a high capacity and demonstrate excellent long‐term cyclic stability in virtue of its favorable structure.…”

Tin‐Assisted Sb2S3 Nanoparticles Uniformly Grafted on Graphene Effectively Improves Sodium‐Ion Storage Performance

“…From in Figure a, the Raman spectroscopy of the Sn@Sb 2 S 3 ‐rGO composite exhibits the two characteristic Raman shift at 1330 and 1590 cm −1 consistent with the disordered carbon (D band) and ordered graphitic carbon (G band), which declares the superior reductive degree of the rGO. The obvious peak at 280 cm −1 lying in Raman spectroscopy can be ascribed to Sb 2 S 3 . Based on the thermogravimetric analysis (TGA) result, the carbon content is about 12.4 % (Figure b).…”

Rational Microstructure Design on Metal–Organic Framework Composites for Better Electrochemical Performances: Design Principle, Synthetic Strategy, and Promotion Mechanism

“…a) Schematic for the fabrication process and b) TEM images of ZnS‐Sb 2 S 3 @C core–shell polyhedrons. Reproduced with permission . Copyright 2017, American Chemical Society.…”

“…The introduction of polymers on the surface of MOFs can also act as a stabilization layer for the derivatives. Recently, a resorcinol‐formaldehyde (RF) was engineered on the surface of Zif‐8 by Yin and co‐workers to stabilize the polyhedron structure so as to obtain a robust composite to endure the subsequent sulfurization process (Figure a,b) . After the sulfidation with TAA and the cation exchange process with Sb 3+ , a core–double shell ZnS‐Sb 2 S 3 @C structure was finally obtained, which exhibited a high reversible capacity of 630 mAh g −1 after 120 cycles with a high columbic efficiency of nearly 100% when tested as anode materials for sodium‐ion batteries.…”