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Updated: Jun 23, 2025

Non-aqueous Electrode Processing and Construction of Lithium-ion Coin Cells
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A gradient-distributed binder with high energy dissipation for stable silicon anode.

Dongyang Zhang1, Yuxin Ouyang1, Yong Wang1

  • 1School of Chemistry, Engineering Research Center of Energy Storage Materials and Devices, Ministry of Education, Xi'an Jiaotong University, Xi'an 710049, People's Republic of China.

Journal of Colloid and Interface Science
|June 15, 2024
PubMed
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A novel gradient-distributed two-component binder (GE-PAA) enhances silicon anodes for lithium-ion batteries. This design significantly improves cyclic stability and structural integrity, enabling long-lasting high-capacity performance.

Area of Science:

  • Materials Science
  • Electrochemistry
  • Energy Storage

Background:

  • Silicon anodes offer higher capacity than graphite for lithium-ion batteries.
  • Silicon's significant volume expansion during cycling causes electrode degradation and poor stability.
  • Effective binders are crucial to mitigate stress and maintain structural integrity in silicon anodes.

Purpose of the Study:

  • To design and investigate a gradient-distributed two-component binder (GE-PAA) for silicon anodes.
  • To reveal the mechanism by which the energy-dissipative binder stabilizes silicon electrodes.
  • To achieve excellent cyclic stability and long cycle life for silicon anodes.

Main Methods:

  • Fabrication of a gradient-distributed binder with an inner polyacrylic acid (PAA) layer and an outer gel electrolyte (GE) layer.
Keywords:
BinderEnergy dissipationGradient distributionLithium-ion batterySi anode

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  • Characterization of the binder's mechanical properties (Young's modulus) and energy dissipation capabilities.
  • Electrochemical testing of silicon electrodes with the GE-PAA binder, including cycling performance and rate capability.

    • Main Results:

    • The GE-PAA binder effectively stabilizes silicon particle interfaces and electrode structure.
    • The outer GE layer dissipates stress during lithiation/de-lithiation, enhancing structural stability.
    • Silicon electrodes retained 1557.4 mAh g-1 after 200 cycles at 0.5 C and 1539.2 mAh g-1 at 1.8 C.

    Conclusions:

    • The gradient binder design provides synergistic effects for superior silicon anode performance.
    • The GE-PAA binder strategy offers a novel approach for developing stable and high-performance silicon anodes.
    • This work demonstrates a promising pathway for advanced lithium-ion battery technology.