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Fe1-xS/Nitrogen and Sulfur Co-doped Carbon Composite Derived from Nanosized Metal-Organic Framework for High-Performance Lithium-Ion Batteries

Abstract

Iron sulfide (Fe1-xS), possessing unique superiorities including high theoretical capacity, easy access of raw materials, and environment-friendly, has stood out from various lithium-ion batteries (LIBs) anode materials. However, there are still some critical obstacles need to be overcame before its practical applications. For instance, the huge volume change occurs during the lithium ion insertion/extraction process, which leads to rapid decay of electrochemical performance. Besides, it is generally difficult to achieve a perfect rate performance for Fe1-xS due to its intrinsic poor conductivity. Herein, we reported a facile method to synthesize Fe1-xS/N, S co-doped carbon composite (Fe1-xS/NSC) using nanosized Fe-based metal-organic framework as precursor. Compared with pure Fe1-xS, the as-synthesized Fe1-xS/NSC composite exhibits higher cycling stability and rate capability as anode for LIBs. For example, a high specific capacity of 1135 mAh g-1 (0.1 A g-1) and 707 mAh g-1 (1 A g-1) can be maintained after 100 cycles and 200 cycles, respectively. Most impressively, a reversible capacity of 586 mAh g-1 is delivered at higher density of 5 A g-1 in the rate test.

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Publication details

The article was received on 28 Aug 2018, accepted on 04 Oct 2018 and first published on 05 Oct 2018


Article type: Research Article
DOI: 10.1039/C8QI00910D
Citation: Inorg. Chem. Front., 2018, Accepted Manuscript
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    Fe1-xS/Nitrogen and Sulfur Co-doped Carbon Composite Derived from Nanosized Metal-Organic Framework for High-Performance Lithium-Ion Batteries

    Y. Liu, M. Zhong, L. Kong, A. Li, X. Sun, D. Wang and X. Bu, Inorg. Chem. Front., 2018, Accepted Manuscript , DOI: 10.1039/C8QI00910D

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