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Journal of Materials Science

, Volume 54, Issue 17, pp 11574–11584 | Cite as

High-strength electrospun carbon nanofibrous mats prepared via rapid stabilization as frameworks for Li-ion battery electrodes

  • Xue Yang
  • Yichun Ding
  • Zhigang Shen
  • Qian Sun
  • Fan Zheng
  • Hao Fong
  • Zhengtao ZhuEmail author
  • Jie Liu
  • Jieying Liang
  • Xiaoxu WangEmail author
Energy materials
  • 286 Downloads

Abstract

Carbon nanofibrous nonwoven mats (CNFMs) prepared via electrospinning offer excellent electrical and structural properties and have been used as frameworks for electrodes in electrochemical energy storage devices. However, lack of mechanical strength hinders the broad applications of CNFMs in flexible electronics or industry use. In this work, a rapid stabilization method is developed to prepare high-strength and flexible CNFMs. Studies of the effects of stabilization time on the structures of the stabilized polyacrylonitrile (PAN) nanofibers and the subsequent carbon nanofibers reveal that there is an optimal stabilization time for making high-strength CNFMs. Long stabilization time results in excessive oxidation of the stabilized PAN nanofibers and unwanted defects in the carbon nanofibers. Short stabilization time results in carbon nanofibers with less crystalline structures due to insufficient formation of the thermally stable ladder-like structure. Robust and flexible CNFM with the highest tensile strength of 192.7 MPa is obtained using an optimized total stabilization time of 40 min. To demonstrate the application of the flexible CNFMs, they are fabricated as an electrode framework to load TiO2 nanoparticles without use of organic binders. Lithium ion half-cell based on this electrode demonstrates superior rate cycling performance owning to the porous structure and highly conductive fibrous carbon network of CNFM.

Notes

Acknowledgements

This research was supported by the National Natural Science Foundation of China (Grant #: 51602016), the Fundamental Research Funds for the Central Universities (Grant #: PYVZ1704, ZY1607). The research at South Dakota School of Mines and Technology was supported by the National Aeronautics and Space Administration (NASA Cooperative Agreement No. 80NSSC18M0022).

Supplementary material

10853_2019_3698_MOESM1_ESM.docx (2.3 mb)
Supplementary material 1 (DOCX 2361 kb)

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Copyright information

© Springer Science+Business Media, LLC, part of Springer Nature 2019

Authors and Affiliations

  1. 1.Key Laboratory of Carbon Fiber and Functional Polymers, Ministry of EducationBeijing University of Chemical TechnologyChao-Yang District, BeijingChina
  2. 2.Department of Chemistry and Applied Biological SciencesSouth Dakota School of Mines and TechnologyRapid CityUSA
  3. 3.SINOPEC Shanghai Research Institute of Petrochemical TechnologyShanghaiChina

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