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Updated: Nov 25, 2025

Application of a Coupling Agent to Improve the Dielectric Properties of Polymer-Based Nanocomposites
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Biobinder Nanocoating for Upgrading the Assembling Structures of High-Capacity Composite Electrodes with a Robust

Xiao-Rong Sun1, Peng Yu1, Ting-Ting Zhang1

  • 1College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu 610065, Sichuan, China.

ACS Applied Materials & Interfaces
|December 17, 2020
PubMed
Summary

A novel poly(lactic acid) nanocoating biobinder enhances lithium-ion battery electrode structures, improving ion and electron transport. This functional coating acts as a protective polymeric artificial cathode electrolyte interphase, boosting battery performance and longevity.

Keywords:
artificial SEI and CEIassembling structures of composite electrodeselectric vehicle batteriesfunctional biobindernanocoating of active materials

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Area of Science:

  • Materials Science
  • Electrochemistry
  • Battery Technology

Background:

  • Next-generation lithium-ion batteries (LIBs) require optimized electrode microstructures and assembling structures for high capacity.
  • Developing advanced electrode assembling structures for high-capacity electrodes is challenging due to limited understanding and strategies.
  • Traditional binders lack the functionality to create robust and uniform electrode architectures.

Purpose of the Study:

  • To propose a functional nanocoating biobinder using poly(lactic acid) for improved electrode assembling structures in LIBs.
  • To investigate the role of this nanocoating biobinder in enhancing electron and ion transport networks and interfaces.
  • To evaluate the performance enhancement of high-capacity electrodes utilizing this novel biobinder.

Main Methods:

  • Fabrication of composite electrodes using a poly(lactic acid) nanocoating biobinder.
  • Characterization of electrode assembling structures, including electron-transportation, ion-transportation networks, and interfaces.
  • Electrochemical performance testing of modified LiFePO4 (LFP), lithium nickel cobalt manganite (NCM), and lithium nickel cobalt aluminum acid (NCA) electrodes.

Main Results:

  • The nanocoating biobinder creates uniform and robust assembling structures in composite electrodes.
  • The nanocoating functions as a polymeric artificial cathode electrolyte interphase (poly-CEI), protecting active particles.
  • Significant improvements in electrochemical performance, including high discharge capacity and cycling stability for LFP, NCM, and NCA cathodes.

Conclusions:

  • The poly(lactic acid) nanocoating biobinder effectively enhances electrode assembling structures and electrochemical performance in LIBs.
  • The developed poly-CEI layer significantly improves the cycling stability of high-capacity cathodes.
  • This study redefines the role of binders in composite electrodes, emphasizing their critical link to assembling structures and overall battery function.