Facile and scalable synthesis of low-cost FeS@C as long-cycle anodes for sodium-ion batteries

Sodium ion batteries have attracted extensive attention due to their earth-abundant elements and potential for low cost. Iron-based materials not only satisfy these demands but also have high theoretical capacities and are of great commercial value. It is, therefore, necessary to conquer the problem...

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Bibliographic Details
Published in:Journal of materials chemistry. A, Materials for energy and sustainability Materials for energy and sustainability, 2019, Vol.7 (34), p.1979-19718
Main Authors: Yang, Dan, Chen, Weihua, Zhang, Xixue, Mi, Liwei, Liu, Chuntai, Chen, Linjie, Guan, Xinxin, Cao, Yuliang, Shen, Changyu
Format: Article
Language:English
Subjects:
Anodes
Batteries
Electrochemical analysis
Electrochemistry
Electrode materials
Electrodes
Iron
Iron sulfides
Kinetics
Low cost
Mapping
Nanocrystals
Precursors
Quantitative analysis
Raw materials
Rechargeable batteries
Scanning electron microscopy
Sodium
Sodium-ion batteries
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Summary:Sodium ion batteries have attracted extensive attention due to their earth-abundant elements and potential for low cost. Iron-based materials not only satisfy these demands but also have high theoretical capacities and are of great commercial value. It is, therefore, necessary to conquer the problems of iron sulfide, including the synthesis method and insufficient cycle stability, from a practical perspective; however, only a few studies have focused on these points. In this work, FeS nanocrystals embedded in a carbon network (FeS@C) were prepared by a homogeneous carbothermal reduction strategy. The advantages of this preparation method are as follows: (1) low-cost and abundant raw materials, (2) green synthesis method without releasing sulfide, (3) simple production processes, and (4) easy large-scale production. The as-synthesized FeS@C demonstrates a long cycle life (97.6%, 3000 cycles) with relatively high initial coulombic efficiency (ICE), high capacity, and excellent rate capacity. The application of FeS@C was further confirmed via a pouch full cell. Sodium ion batteries attract extensive attention owning to their earth-abundant elements and potential of low cost. Low-cost FeS@C as anode was prepared from the practical perspective including the simple synthesis method and sufficient cycle stability (97.6%, 3000 cycles).
ISSN:2050-7488
2050-7496
DOI:10.1039/c9ta05664e