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Electrostatic spray deposition of porous Fe sub(2)O sub(3) thin films as anode material with improved electrochemical performance for lithium-ion batteries

Wang, L ; Xu, H W ; Chen, P C ; Zhang, D W ; Ding, C X ; Chen, CH

Journal of power sources, 1901-01, Vol.193 (20090900), p.846-850 [Periódico revisado por pares]

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  • Título:
    Electrostatic spray deposition of porous Fe sub(2)O sub(3) thin films as anode material with improved electrochemical performance for lithium-ion batteries
  • Autor: Wang, L ; Xu, H W ; Chen, P C ; Zhang, D W ; Ding, C X ; Chen, CH
  • É parte de: Journal of power sources, 1901-01, Vol.193 (20090900), p.846-850
  • Notas: ObjectType-Article-2
    SourceType-Scholarly Journals-1
    content type line 23
    ObjectType-Feature-1
  • Descrição: Iron oxide materials are attractive anode materials for lithium-ion batteries for their high capacity and low cost compared with graphite and most of other transition metal oxides. Porous carbon-free alpha - Fe sub(2)O sub(3) films with two types of pore size distribution were prepared by electrostatic spray deposition, and they were characterized by X-ray diffraction, scanning electron microscopy and X-ray absorption near-edge spectroscopy. The 200 degree C-deposited thin film exhibits a high reversible capacity of up to 1080 mAh g super(-1), while the initial capacity loss is at a remarkable low level (19.8%). Besides, the energy efficiency and energy specific average potential (E sub(av)) of the Fe sub(2)O sub(3) films during charge/discharge process were also investigated. The results indicate that the porous alpha -Fe sub(2)O sub(3) films have significantly higher energy density than Li sub(4)Ti sub(5)O sub(12) while it has a similar E sub(av) of about 1.5 V. Due to the porous structure that can buffer the volume changes during lithium intercalation/de- intercalation, the films exhibit stable cycling performance. As a potential anode material for high performance lithium-ion batteries that can be applied on electric vehicle and energy storage, rate capability and electrochemical performance under high-low temperatures were also investigated.
  • Idioma: Inglês
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  • Realização: ABCD-USP USP   Logos de Redes Sociais: Freepik

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