Journal
MACROMOLECULAR MATERIALS AND ENGINEERING
Volume 298, Issue 7, Pages 806-813Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/mame.201200158
Keywords
coaxial electrospinning; fibers; lithium ion batteries; nanocomposites; separators
Funding
- Instrument Developing Project of the Chinese Academy of Sciences [YZ201137]
- '100 talents' program of the Chinese Academy of Sciences
- National Program on Key Basic Research Project of China (973 Program) [MOST2011CB935700]
- National Natural Science Foundation [20971077, 20901044, 20902052]
- Shangdong Province Fund for Distinguished Young Scientist [JQ200906]
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A composite core@sheath nanofibrous separator for lithium ion batteries is fabricated via coaxial electrospinning, using thermosetting PI as the core material and PVDF-HFP as the sheath material. It is demonstrated that the PI@PVDF-HFP nonwovens display remarkably improved tensile strength up to 53MPa and high thermal stability up to 300 degrees C. The electrochemical characterization shows that cells using core@sheath nonwovens as separators display better rate capability and better cycling capacity retention. Considerable mechanical strength, higher thermal stability and preferable rate capability might make this kind of core@sheath nonwovens promising separators for higher-power application.
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