Vacuum quartz capsule-assisted decoration of ZIF-8 derived ZnS/PC with SnS for enhanced lithium storage properties

Owing to compositional advantages of the high theoretical capacity and 3D porous nanoarchitecture, the strategies for coupling of metal sulfide and metal-organic frameworks (MOFs) derived carbon materials have drawn considerable attention for high performance lithium storage. Herein, we present SnS decorated zeolitic imidazolate framework-8 derived ZnS/3D porous carbon composite (denoted as ZnS/PC) using the vacuum quartz capsule-assisted decoration method (denoted as ZnS/SnS/PC). In the composite, 3D-porous carbon could play the part of a conductive matrix as well as the buffer support for volume variation, while the decoration of ZnS/PC with SnS could provide abundant redox reactions, which could reinforce the storage properties and ions/electrons transfer driving force of ZnS/PC. Significantly, the synergistic coupling effect between the mixed metal sulfides and robust carbon matrix could further improve the electrochemical behavior. When compared with ZnS/PC anode for lithium-ion battery, ZnS/SnS/PC composite manifests obvious improvement in electrochemical performance for lithium storage, as well as appreciable lithium storage properties in a full lithium-ion battery. (C) 2022 Published by Elsevier B.V.

Automated summary

The coupling strategy of metal sulfides and metal-organic frameworks derived carbon materials has shown promising results for enhancing lithium storage performance. In this study, a SnS decorated ZnS/3D porous carbon composite was successfully prepared and exhibited improved electrochemical properties for lithium storage.