Metal-organic framework derived porous hollow ternary sulfide as robust anode material for sodium ion batteries

Multiple-metal compound materials have been demonstrated as high performance anode materials for energy storage. In this work, porous hollow polyhedron structured multicomponent sulfides and N-doped carbon-based composite (MnS-(ZnCo)S/N-C) is prepared through a gas-solid reaction using Mn, Zn, Co-based ternary metal-organic frameworks as precursor. As sodium ion batteries anode, MnS-(ZnCo)S/N-C exhibits impressive electrochemical performance, especially for the cycling performance at high current. At a current density of 2.0 A g(-1), it delivers a capacity of 316 mAh g(-1) within 400 cycles and a high capacity retention (92.9%) compared with that of the third cycle. Furthermore, the composite electrode maintains a capacity retention of 40% when the current raises from 0.1 to 10.0 A g(-1) step by step. As a robust sodium storage host, this composite anode benefits from porous hollow polyhedron structures composed of primary nanoparticles, N doped C coating on primary particles, and multicomponent sulfides. (C) 2019 Elsevier Ltd. All rights reserved.