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Related Experiment Video

Updated: Jul 22, 2025

Electric-field Control of Electronic States in WS2 Nanodevices by Electrolyte Gating
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Surface Chemistry-Controlled SEI Layer on Silicon Electrodes by Regulating Electrolyte Decomposition.

Long Li1, Chun Fang1, Gang He2

  • 1State Key Laboratory of Material Processing and Die & Mould Technology, School of Materials Science and Engineering, Huazhong University of Science and Technology, Wuhan, Hubei 430074, P. R. China.

ACS Applied Materials & Interfaces
|July 23, 2023
PubMed
Summary
This summary is machine-generated.

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Regenerative Artificial Solid Electrolyte Interphase via Dynamic Cross-Linking for Stable Lithium Metal Anodes.

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Revealing competitive interfacial reactions in high-energy Li-S batteries.

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Ultrafast Joule-Heating Disproportionation for Engineering Sub-2 nm Si Nanodomains toward Stable, High-Performance SiO Anodes.

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Direct Regeneration of Spent LiNi<sub>0.8</sub>Co<sub>0.1</sub>Mn<sub>0.1</sub>O<sub>2</sub> into Ce-Doped Single-Crystal Cathodes.

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Active Sodium Occupancy Ratio-A Guiding Descriptor for Predicting Na<sub>4</sub>Fe<sub>3</sub>(PO<sub>4</sub>)<sub>2</sub>P<sub>2</sub>O<sub>7</sub> Sodium Storage Performance.

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Oxidation-reconstructed Li<sup>+</sup> transport enables high-tap-density single-crystal regeneration of spent LiNi<sub>0.5</sub>Co<sub>0.2</sub>Mn<sub>0.3</sub>O<sub>2</sub> positive electrodes.

Nature communications·2026

Surface modification with poly(ethylene glycol) diglycidyl ether (PEGDE) stabilizes solid electrolyte interface (SEI) layers in silicon anodes. This enhances lithium-ion battery performance and durability.

Area of Science:

  • Materials Science
  • Electrochemistry
  • Energy Storage

Background:

  • Silicon anodes are promising for high-capacity lithium-ion batteries but suffer from unstable solid electrolyte interface (SEI) layers due to volume changes.
  • Interface stability is critical for the electrochemical performance and practical application of silicon electrodes.

Purpose of the Study:

  • To improve the stability of silicon anodes in lithium-ion batteries by modifying the electrode interface.
  • To investigate the effect of poly(ethylene glycol) diglycidyl ether (PEGDE) on SEI layer formation and electrochemical performance.

Main Methods:

  • Modification of silicon electrode interfaces with ion-conductive PEGDE.
  • Electrochemical testing including cycling performance and rate capability measurements.
Keywords:
distribution of relaxation timeslithium-ion batteriessilicon anodessolid electrolyte interface

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  • Analysis of SEI layer composition and stability.

    • Main Results:

    • PEGDE modification stabilized the SEI layer, enabling silicon anodes to achieve over 1800 mAh g⁻¹ at 2 A g⁻¹ with 77.25% retention after 300 cycles.
    • The PEGDE-decorated electrode exhibited excellent rate capability, reaching 777 mAh g⁻¹ at 20 A g⁻¹.
    • PEGDE increased the Li₂CO₃ ratio in the SEI layer, enhancing interface stability and Li⁺ conductivity, suppressing electrolyte decomposition.

    Conclusions:

    • Surface modification with PEGDE is an effective strategy to regulate SEI layer composition and improve interface stability in silicon anodes.
    • This approach significantly enhances the electrochemical performance, cycle life, and rate capability of silicon-based lithium-ion batteries.
    • The findings offer a promising route for the practical manufacture of high-performance silicon anodes.