[KSCI] Korea Science Citation Index Service

http://dx.doi.org/10.9713/kcer.2018.56.6.819

Application of Porous Nanofibers Comprising Hollow α-Fe₂O₃ Nanospheres Prepared by Applying Both PS Template and Kirkendall Diffusion Effect for Anode Materials in Lithium-ion Batteries

Lee, Young Kwang (Department of Engineering Chemistry, Chungbuk National University)
Jeong, Sun Young (Department of Engineering Chemistry, Chungbuk National University)
Cho, Jung Sang (Department of Engineering Chemistry, Chungbuk National University)

Publication Information

Korean Chemical Engineering Research / v.56, no.6, 2018 , pp. 819-825 More about this Journal

Abstract

Porous nanofibers comprising hollow ${\alpha}-Fe_2O_3$ nanospheres were prepared by applying both template method and Kirkendall diffusion effect to electrospinning process. During heat-treatment processes, the solid Fe nano-metals formed by initial heat-treatment in the carbon matrix were converted into the hollow structured ${\alpha}-Fe_2O_3$ nanospheres. In particular, PS nanobeads added in the spinning solution were decomposed and formed numerous channels in the composite, which served as a good pathway for Kirkendall diffusion gas. The resulting porous nanofibers comprising hollow ${\alpha}-Fe_2O_3$ nanospheres were applied as an anode material for lithium-ion batteries. The discharge capacities of the nanofibers for the 30th cycle at a high current density of $1.0A\;g^{-1}$ was $776mA\;h\;g^{-1}$ . The good lithium ion storage property was attributed to the synergetic effects of the hollow ${\alpha}-Fe_2O_3$ nanospheres and the interstitial nanovoids between the nanospheres. The synthetic method proposed in this study could be applied to the preparation of porous nanofibers comprising hollow nanospheres with various composition for various applications, including energy storage.

Keywords

Hollow structure; Nanofibers; Electrospinning; Kirkendall diffusion; Anodes; Batteries;

Citations & Related Records

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