Research Article


2018, 11(12): 6206–6216


Amine-assisted synthesis of FeS@N-C porous nanowires for highly reversible lithium storage

Xiujuan Wei§, Xin Tan§, Jiasheng Meng, Xuanpeng Wang, Ping Hu, Wei Yang, Shuangshuang Tan, Qinyou An (*), and Liqiang Mai (*)

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State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan 430070, China
§ Xiujuan Wei and Xin Tan contributed equally to this work.

Keywords: iron sulfide, N-doped carbon matrix, porous nanowires, lithium-ion batteries, superior cycling stability
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ABSTRACT Iron sulfide is an attractive anode material for lithium-ion batteries (LIBs) due to its high specific capacity, environmental benignity, and abundant resources. However, its application is hindered by poor cyclability and rate performance, caused by a large volume variation and low conductivity. Herein, iron sulfide porous nanowires confined in an N-doped carbon matrix (FeS@N-C nanowires) are fabricated through a simple amine-assisted solvothermal reaction and subsequent calcination strategy. The as-obtained FeS@N-C nanowires, as an LIB anode, exhibit ultrahigh reversible capacity, superior rate capability, and long-term cycling performance. In particular, a high specific capacity of 1,061 mAh·g−1 can be achieved at 1 A·g−1 after 500 cycles. Most impressively, it exhibits a high specific capacity of 433 mAh·g−1 even at 5 A·g−1. The superior electrochemical performance is ascribed to the synergistic effect of the porous nanowire structure and the conductive N-doped carbon matrix. These results demonstrate that the synergistic strategy of combining porous nanowires with an N-doped carbon matrix holds great potential for energy storage.
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Amine-assisted synthesis of FeS@N-C porous nanowires for highly reversible lithium storage. Nano Res. 2018, 11(12): 6206–6216

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