Abstract
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.
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