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Preparation and Characterization of Electrospun Multi-layered Polyimide Nanoweb with Enhanced Mechanical Properties

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Abstract

In this study, we report a multi-layered PI nanoweb composed of a uniaxially aligned PI nanoweb and a randomly oriented PI nanoweb prepared by a general electrospinning method, and their physical and electrochemical properties required for use as a battery separator are investigated systematically. Morphological analysis showed clearly that a multi-layered structure is well formed within the PI nanoweb. The tensile strength and modulus of the multi-layered PI nanoweb increased by about 120 % and 359 %, respectively, compared to the randomly oriented PI nanoweb. Also, it was confirmed that the pore characteristics of the multi-layered PI nanoweb were not significantly changed compared to the randomly oriented PI nanoweb which can be considered to be prepared by general electrospinning method, despite the insertion of the intermediate reinforcing layer uniaxially aligned in the machine and cross directions. Finally, the electrochemical properties of the multi-layered PI nanoweb using a coin cell showed similar results on charge-discharge cycling compared to Celgard 2400 membrane. As a result, we believe that the multi-layered PI nanoweb proposed in this study has sufficient potential for applications to lithium-ion batteries membranes, as well as other industrial fields, based on excellent heat resistance originated from the rigid PI molecule and improved mechanical properties by effective reinforcing layers within the PI nanoweb.

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Authors and Affiliations

  1. Department of Advanced Organic Materials and Textile System Engineering, Chungnam National University, Daejeon, 34134, Korea

    Yo Sub Park, Min Ho Jee & Doo Hyun Baik

  2. Biotech-Chemistry and Service Standards Division, Korean Agency for Technology and Standards, Ministry of Trade, Industry and Energy, Eumseong, Seoul, 27737, Korea

    Min Ho Jee

Authors
  1. Yo Sub Park
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  2. Min Ho Jee
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  3. Doo Hyun Baik
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Correspondence to Min Ho Jee or Doo Hyun Baik.

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Park, Y.S., Jee, M.H. & Baik, D.H. Preparation and Characterization of Electrospun Multi-layered Polyimide Nanoweb with Enhanced Mechanical Properties. Fibers Polym 23, 360–365 (2022). https://doi.org/10.1007/s12221-021-0517-9

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  • DOI: https://doi.org/10.1007/s12221-021-0517-9

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