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Related Concept Videos

Fibronectins Connect Cells with ECM01:25

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Fibronectin is an adhesive glycoprotein present in the extracellular matrix of embryogenic and adult tissue. These molecules primarily aid in regulating cell motility and attachment. A fibronectin molecule is composed of two identical polypeptide chains attached to each other by a pair of disulfide bonds at the C-terminal.
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Fibrous proteins are either long and narrow proteins or assemble to form long and thin structures. They contain repetitive units and usually consist of either alpha helices or beta sheets and, in rare cases, a mix of both. The amino acids in the primary structure often consist of repeating amino acid sequences. The role of fibrous proteins is primarily structural. Many are located in the extracellular matrix and are present in connective tissues to impart strength and joint mobility. They are...
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Related Experiment Video

Updated: May 5, 2026

Construction and Testing of Coin Cells of Lithium Ion Batteries
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Fibroin: A Multi-Functional Bio-Derived Binder for Lithium-Sulfur Batteries.

Yiming Guo1,2, Roby Soni1,2,3, Kofi Coke1

  • 1Electrochemical Innovation Lab, Department of Chemical Engineering, University College London, Torrington Place, London WC1E 7JE, U.K.

ACS Sustainable Chemistry & Engineering
|September 5, 2025
PubMed
Summary

Fibroin, a sustainable biopolymer, offers a greener alternative to traditional binders in lithium-sulfur (Li-S) batteries. It enhances battery performance and simplifies recycling, addressing key challenges in current Li-S battery technology.

Keywords:
Li–S batteryaqueous battery binderbattery recyclingpolysulfide shuttle effectprotein binder

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Area of Science:

  • Materials Science
  • Electrochemistry
  • Sustainable Chemistry

Background:

  • Traditional binders like PVDF in Li-S batteries pose environmental and recycling issues.
  • Existing binders offer limited impact on cell chemistry degradation and polysulfide shuttle.
  • Need for binders that improve Li-S battery performance and sustainability.

Purpose of the Study:

  • To investigate fibroin as a sustainable and high-performance binder for Li-S batteries.
  • To evaluate fibroin's ability to mitigate polysulfide shuttle and electrode expansion.
  • To assess the recyclability advantages of fibroin-based electrodes.

Main Methods:

  • Electrode preparation using fibroin as a binder.
  • Performance testing in Li-S coin and pouch cells with high sulfur loading.
  • In situ and operando analysis to understand binder properties.
  • Assessment of electrode recyclability under acidic conditions.

Main Results:

  • Fibroin effectively traps polysulfides, enhancing Li-S battery performance.
  • Fibroin-based electrodes exhibit high capacities and Coulombic efficiencies.
  • Demonstrated ease of recycling for fibroin electrodes compared to PVDF.

Conclusions:

  • Fibroin is a promising, eco-friendly binder for Li-S batteries.
  • Fibroin enhances battery performance and offers significant sustainability advantages.
  • Fibroin presents a viable alternative to PVDF, improving recyclability.