期刊
ACS APPLIED MATERIALS & INTERFACES
卷 5, 期 6, 页码 2278-2282出版社
AMER CHEMICAL SOC
DOI: 10.1021/am4003099
关键词
electrospinning; block copolymer; TiO2; cigarlike; hierarchical porous
资金
- National Science Foundation of China [21074029, 51173036, 21104013, 21104014, 51102274]
- Zhejiang Provincial Natural Science Foundation of China [R4110021]
- PCSIRT [IRT 1231]
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.
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