Fe-alginate biomass-derived FeS/3D interconnected carbon nanofiber aerogels as anodes for high performance sodium-ion batteries

The development of anode materials with a high capacity, excellent rate capability, and acceptable stability for sodium-ion batteries (SIBs) is still an urgent issue. Here, we fabricated FeS nanoparticle (NP)/three-dimensional (3D) carbon nanofiber aerogels (CNA) composites utilizing Fe-alginate aer...

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Bibliographic Details
Published in:Journal of alloys and compounds 2019-07, Vol.795, p.54-59
Main Authors: Liu, Hongli, Lv, Chunxiao, Chen, Shuai, Song, Xiaoyang, Liu, Bohan, Sun, Jin, Zhang, Huawei, Yang, Dongjiang, She, Xilin, Zhao, Xiaoliang
Format: Article
Language:English
Subjects:
Aerogels
Alginates
Anode materials
Anodes
Carbon fibers
Electrode materials
Electron conductivity
Fe-alginate aerogels
FeS/CNA sample
Ion diffusion
Iron
Nanofibers
Nanoparticles
Rechargeable batteries
Sodium diffusion
Sodium-ion batteries
Stability
Three-dimensional carbon nanofiber aerogel
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Summary:The development of anode materials with a high capacity, excellent rate capability, and acceptable stability for sodium-ion batteries (SIBs) is still an urgent issue. Here, we fabricated FeS nanoparticle (NP)/three-dimensional (3D) carbon nanofiber aerogels (CNA) composites utilizing Fe-alginate aerogels as the renewable precursor. In the FeS/CNA sample, well-distributed FeS NPs were embedded on a 3D-CNA network with high electron conductivity and a large specific surface area. Impressively, the FeS/CNA sample was evaluated as an anode electrode material for SIBs, and exhibited an excellent specific capacity (473 mA h g−1 at 0.1 A g−1) and outstanding rate capacity (291 mA h g−1 at 5 A g−1). In addition, 97.4% of the capacity, 385 mA h g−1, was retained over 400 cycles at 2 A g−1, indicating the prominent cycling stability of the FeS/CNA sample. The results were ascribed to the unique structure of the FeS particles embedded on interconnected CNAs, which could boost sodium ion diffusion and facilitate electrolyte access. •Fe-alginate aerogels assure uniform dispersion of FeS NPs on porous carbon matrix.•1D carbon fibers as transport channels can constitute porous 3D porous network.•FeS NPs and 3D network CNAs have a synergistic effect on sodium storage.•The FeS/CNA electrode reveals an excellent and stable electrochemical performance.
ISSN:0925-8388
1873-4669
DOI:10.1016/j.jallcom.2019.04.213