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α‐Fe 2 O 3 Nanoparticles Decorated C@MoS 2 Nanosheet Arrays with Expanded Spacing of (002) Plane for Ultrafast and High Li/Na‐Ion Storage
Author(s) -
Zhan Jing,
Wu Kuan,
Yu Xue,
Yang Mengjia,
Cao Xu,
Lei Bo,
Pan Dengyu,
Jiang Hu,
Wu Minghong
Publication year - 2019
Publication title -
small
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.785
H-Index - 236
eISSN - 1613-6829
pISSN - 1613-6810
DOI - 10.1002/smll.201901083
Subject(s) - nanosheet , materials science , anode , electrochemistry , nanoparticle , electrode , lithium (medication) , nanotechnology , nanomaterials , chemical engineering , graphite , conductivity , carbon fibers , composite number , composite material , chemistry , medicine , endocrinology , engineering
MoS 2 nanosheets as a promising 2D nanomaterial have extensive applications in energy storage and conversion, but their electrochemical performance is still unsatisfactory as an anode for efficient Li + /Na + storage. In this work, the design and synthesis of vertically grown MoS 2 nanosheet arrays, decorated with graphite carbon and Fe 2 O 3 nanoparticles, on flexible carbon fiber cloth (denoted as Fe 2 O 3 @C@MoS 2 /CFC) is reported. When evaluated as an anode for lithium‐ion batteries, the Fe 2 O 3 @C@MoS 2 /CFC electrode manifests an outstanding electrochemical performance with a high discharge capacity of 1541.2 mAh g −1 at 0.1 A g −1 and a good capacity retention of 80.1% at 1.0 A g −1 after 500 cycles. As for sodium‐ion batteries, it retains a high reversible capacity of 889.4 mAh g −1 at 0.5 A g −1 over 200 cycles. The superior electrochemical performance mainly results from the unique 3D ordered Fe 2 O 3 @C@MoS 2 array‐type nanostructures and the synergistic effect between the C@MoS 2 nanosheet arrays and Fe 2 O 3 nanoparticles. The Fe 2 O 3 nanoparticles act as spacers to steady the structure, and the graphite carbon could be incorporated into MoS 2 nanosheets to improve the conductivity of the whole electrode and strengthen the integration of MoS 2 nanosheets and CFC by the adhesive role, together ensuring high conductivity and mechanical stability.