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Ultrasmall Fe 3 O 4 Nanoparticle/MoS 2 Nanosheet Composites with Superior Performances for Lithium Ion Batteries
Author(s) -
Chen Yu,
Song Bohang,
Tang Xiaosheng,
Lu Li,
Xue Junmin
Publication year - 2014
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.201302879
Subject(s) - materials science , nanosheet , anode , nanoparticle , composite number , electrochemistry , electrolyte , lithium (medication) , graphene , chemical engineering , nanotechnology , ion , lithium ion battery , battery (electricity) , composite material , electrode , quantum mechanics , endocrinology , engineering , medicine , power (physics) , chemistry , physics
A novel composite consisting of graphene‐like MoS 2 nanosheets and ultrasmall Fe 3 O 4 nanoparticles (≈3.5 nm) is synthesized as an anode for lithium ion battery application. In such composite anode, MoS 2 nanosheets provide flexible substrates for the nanoparticle decoration, accommodating the volume changes of Fe 3 O 4 during cycling process; while Fe 3 O 4 nanoparticles primarily act as spacers to stabilize the composite structure, making the active surfaces of MoS 2 nanosheets accessible for electrolyte penetration during charge/discharge processes. Owing to the high reversible capacity provided by the MoS 2 nanosheets and the superior high rate performance offered by ultrasmall Fe 3 O 4 nanoparticles, superior cyclic and rate performances are achieved by Fe 3 O 4 /MoS 2 anode during the subsequent electrochemical tests, delivering 1033 and 224 mAh g −1 at current densities of 2000 and 10 000 mA g −1 , respectively.