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Formation of C@Fe 3 O 4 @C Hollow Sandwiched Structures with Enhanced Lithium‐Storage Properties
Author(s) -
Ma Xiaojian,
Huang Lefei,
Wu Fangfang,
Xiong Shenglin,
Xi Baojuan
Publication year - 2016
Publication title -
european journal of inorganic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 1434-1948
DOI - 10.1002/ejic.201600432
Subject(s) - anode , lithium (medication) , carbonization , nanocomposite , chemistry , composite number , calcination , nanotechnology , chemical engineering , carbon fibers , conductivity , electrochemistry , carbon nanotube , current density , resorcinol , electrical resistivity and conductivity , nanoparticle , electrode , materials science , composite material , catalysis , organic chemistry , adsorption , medicine , physics , electrical engineering , quantum mechanics , engineering , endocrinology
Transition‐metal oxides are considered promising anode materials for lithium‐ion batteries (LIBs). However, their application is limited because of huge volume changes and poor conductivity during the discharge/charge process. To this end, integration of different active components into an assemblage poses a potential solution. To gain better structural and synthetic control, the integration should be executed in a stepwise manner. In this paper, a versatile strategy to obtain C@Fe 3 O 4 @C hollow sandwiched composite structures was explored. Starting from Fe 2 O 3 nanotubes, a RF (resorcinol–formaldehyde resins) layer was sequentially applied outside to form RF@Fe 2 O 3 @RF structures, which were calcined to realize carbonization and finalize the C@Fe 3 O 4 @C sandwiched structures. To the best of our knowledge, this is the first study on the preparation of a novel Fe 3 O 4 /carbon‐based nanocomposite. Upon using as an anode material for LIBs, the C@Fe 3 O 4 @C hollow sandwiched structures displayed high reversible capacity and good rate performance. The discharge capacity was maintained at 593 mA h g –1 after 350 cycles at a current density of 1000 mA g –1 , which is better than that of Fe 2 O 3 nanotubes (discharge capacity of 140 mA h g –1 after 80 cycles at 500 mA g –1 ). The improved electrochemical performance was attributed to the unique hollow sandwiched composite structure and good electrical conductivity.