期刊
MATERIALS CHEMISTRY AND PHYSICS
卷 182, 期 -, 页码 308-314出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.matchemphys.2016.07.037
关键词
Nanofibrous membranes; Lithium ion battery; Electrochemical performance; Separator
资金
- National Natural Science Foundation of China [515030284, 51322304]
- Shanghai Rising-Star Program [16QA1400200]
- Program for Professor of Special Appointment (Eastern Scholar) at Shanghai Institutions of Higher Learning [TP2016019]
- National Key Research and Development Program of China [2016YFB0303201, 2016YFB0303203]
- Fundamental Research Funds for the Central Universities
- DHU Distinguished Young Professor Program
- State key Laboratory for Modification of Chemical Fibers and Polymer Materials, Donghua University [LK1513]
Lithium ion batteries (LIBs) for high performance require separators with auspicious reliability and safety. Keeping LIBs reliability and safety in view, microporous polyacrylonitrile (PAN)/polyurethane (PU) nonwoven composite separator have been developed by electrospinning technique. The physical, electrochemical and thermal properties of the PAN/PU separator were characterized. Improved ionic conductivity up to 2.07 S cm(-1), high mechanical strength (1038 MPa) and good anodic stability up to 5.10 V are key outcomes of resultant membranes. Additionally, high thermal stability displaying only 4% dimensional change after 0.5 h long exposure to 170 degrees C in an oven, which could be valuable addition towards the safety of LIBs. Comparing to commercialized polypropylene based separators, resulting membranes offered improved internal short-circuit protection function, offering better rate capability and enhanced capacity retention under same observation conditions. These fascinating characteristics endow these renewable composite nonwovens as promising separators for high power LIBs battery. (C) 2016 Elsevier B.V. All rights reserved.
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