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Preparation of Functional Silica Using a Bioinspired Method
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Bioinspired Microphase-Engineered Binders for Silicon Anodes.

Lirong Tang1, Lan Zhao1, Zhiyi Cao1

  • 1College of Material Engineering, Fujian Agriculture and Forestry University, Fujian, China.

Advanced Science (Weinheim, Baden-Wurttemberg, Germany)
|February 21, 2026
PubMed
Summary
This summary is machine-generated.

A novel lipoic acid-rosin acrylate (LRA) binder enhances silicon anodes by mimicking armor plating for superior mechanical buffering and ion transport. This bio-based binder improves battery stability and performance.

Keywords:
bioinspired materialsmechanophoresmicrophase engineeringsilicon anodessolid electrolyte interphase

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Area of Science:

  • Materials Science
  • Electrochemistry
  • Polymer Chemistry

Background:

  • Silicon anodes are promising for high-capacity batteries but suffer from large volume changes during cycling.
  • Existing binders often limit ion transport or fail to provide adequate mechanical support, hindering long-term stability.
  • Developing adaptive binders that buffer volume expansion while maintaining interfacial integrity is crucial for silicon anode performance.

Purpose of the Study:

  • To develop a novel, bio-based binder with enhanced mechanical properties and ion transport capabilities for silicon anodes.
  • To investigate the self-assembly behavior and microphase engineering of the new binder system.
  • To evaluate the electrochemical performance and long-term stability of silicon anodes utilizing the developed binder.

Main Methods:

  • Synthesis of lipoic acid-rosin acrylate (LRA) binder using thiol-ene click chemistry.
  • Incorporation of LRA into hinged-tethering phosphorylated cellulose nanocrystals (HT-PCNCs) and alginate-Ba2+ scaffolds.
  • Characterization of binder mechanical properties (tensile strength, fracture energy) and ionic conductivity.
  • Electrochemical testing of silicon anodes, including cycling stability, rate capability, and solid electrolyte interphase (SEI) analysis.

Main Results:

  • The LRA binder exhibits high stretchability (4154%) and self-assembles into microphase arrangements.
  • The hybrid binder structure, inspired by insect armor, provides localized strain dissipation and self-repair.
  • Composite binder achieved high tensile strength (308.52 MPa), fracture energy (3288.48 MJ m⁻³), and ionic conductivity (33.607 mS cm⁻¹).
  • Silicon electrodes demonstrated 83.25% capacity retention after 100 cycles, high rate capability, and long-term durability with an ultrathin LiF-rich SEI.

Conclusions:

  • Spatially resolved microphase engineering of adaptive bio-based binders is a viable strategy for advanced silicon anodes.
  • The developed LRA-based binder effectively buffers volume changes, enhances mechanical robustness, and facilitates ion transport.
  • This approach leads to significantly improved electrochemical performance and long-term stability in silicon anodes.