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Related Concept Videos

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Cellulose and Pectic Polysaccharides

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Solid-state Graft Copolymer Electrolytes for Lithium Battery Applications
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Form-stable, crosslinked cellulose-based paper separators for charge storage applications.

Julian Selinger1, M Tauhidul Islam2, Qamar Abbas3

  • 1Institute of Bioproducts and Paper Technology, Graz University of Technology, Inffeldgasse 23, 8010 Graz, Austria; Department of Bioproducts and Biosystems, Aalto University, Vuorimiehentie 1, FI-00076 Aalto, Finland.

Carbohydrate Polymers
|August 22, 2024
PubMed
Summary
This summary is machine-generated.

This study enhances cellulose separators for green energy storage by adding microfibrillated cellulose (MFC) and crosslinking with BTCA. This improves wet strength and dimensional stability, making them suitable for batteries.

Keywords:
CrosslinkingEnergy storageMicrofibrillated cellulosePaper-makingSeparator design

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Area of Science:

  • Materials Science
  • Electrochemistry
  • Renewable Energy Storage

Background:

  • Cellulose-derived separators are crucial for green energy storage but often lack sufficient porosity and wet strength.
  • Existing separators face challenges in performance and durability for advanced energy storage applications.

Purpose of the Study:

  • To develop improved cellulose-based separators for energy storage devices using microfibrillated cellulose (MFC).
  • To address the limitations of poor wet strength and dimensional stability in paper-based separators.
  • To evaluate the electrochemical performance of the enhanced separators.

Main Methods:

  • Integration of microfibrillated cellulose (MFC) into paper sheets to tailor separator properties.
  • Crosslinking the cellulose separators using 1,2,3,4-butanetetracarboxylic acid (BTCA).
  • Characterization of physical properties (thickness, air permeability, mechanical strength) and electrochemical performance (impedance spectroscopy, galvanostatic cycling).

Main Results:

  • MFC integration improved network formation and allowed tailoring of thickness and air permeability.
  • Crosslinking with BTCA significantly increased wet strength by up to 6700% and ensured dimensional stability.
  • Electrochemical performance was comparable to commercial separators, showing good ion diffusion, rate capability, and capacitance retention.

Conclusions:

  • A paper technological approach using MFC and BTCA crosslinking effectively overcomes the limitations of paper-based separators.
  • The developed separators offer a promising, sustainable alternative for green energy storage applications.
  • This method enhances separator durability and stability without compromising electrochemical performance.