Novel Cigarlike TiO2 Nanofibers: Fabrication, Improved Mechanical, and Electrochemical Performances

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• 作者：Jichun You ; Wenjia Sheng ; Keke Huang ; Changmin Hou ; Huijuan Yue ; Bin Hu ; Min Wang ; Donglei Wei ; Qingwen Li ; Liping Zhao ; Wenyong Dong ; Zhigang Zhao ; Yongjin Li
• 刊名：ACS Applied Materials & Interfaces
• 出版年：2013
• 出版时间：March 27, 2013
• 年：2013
• 卷：5
• 期：6
• 页码：2278-2282
• 全文大小：326K
• 年卷期：v.5,no.6(March 27, 2013)
• ISSN：1944-8252

文摘

By coupling the self-assembly of polystyrene-block-poly(ethylene oxide) (PS-b-PEO) containing titanium precursors with the electrospinning technique, novel cigarlike nanofibers with an outer-shell and inner-continuous-pore structure and resultant fabrics were fabricated. Different from typical porous metal oxides, the prepared high-surface-area nonwoven fabrics show excellent mechanical properties. Not only are these fabrics self-supporting over a large area, but they can also be cut using scissors, which is important for large-scale applications. Furthermore, as electrode materials in Li-ion batteries, these fabrics exhibit much higher charge/discharge capacity and cycle stability compared with the commercially available nanosized TiO₂ (P25). The improved mechanical and electrochemical performances are attributed to the presence of an outer-shell, inner-bicontinuous structures (including continuous TiO₂ frame and continuous nanopores) and hierarchical pores from the cigarlike nanofibers.

Keywords:

electrospinning; block copolymer; TiO₂; cigarlike; hierarchical porous