In–situ growth of flake SnS in three–dimensional hierarchical porous carbon boosting lithium storage performance

Abstract

As a kind of superior performance anode material for lithium–ion batteries (LIBs), tin sulfide (SnS) still faces pressing issues such as conspicuous volume expansion and inferior rate performance in the reaction process. To effectively improve such pressing issues, this study presents a three–dimensional (3D) hierarchical porous carbon (HPC) and subtly takes flake SnS growing in situ on it. The 3D HPC has excellent interconnected porosity and different diameters of aperture, which play the role of bicontinuous transport of electrons and ions, and comprehensively improve the SnS electrochemical performance. In particular, the SnS@HPC anode delivers an excellent discharge capacity of 917.6 mAh g−1 after 100 cycles at 0.1 A g−1 current density and maintains a cycling stability with 500.7 mAh g−1 after 500 cycles at 2 A g−1 current density. More importantly, SnS@HPC||LiFePO4 full–cells also have excellent rate performance and cycling stability.