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<p>Solid polymer electrolytes that combine high ionic conductivity, mechanical integrity, and self-healing capability are essential for next-generation solid-state batteries. In this work, a dual-network self-healing polymer electrolyte based on poly(ethylene oxide) (PEO), polyaniline (PANI), and polyethylene glycol bis-carbamate dimethacrylate (PEGCBDMA), doped with lithium bis(trifluoromethanesulfonyl)imide (LiTFSI), is developed. The covalently crosslinked PEGCBDMA network and the conductive PANI phase synergistically enhance ion transport and structural stability. The optimized PEO/PANI–PEGCBDMA:LiTFSI composite exhibits a high ionic conductivity of 1.42 × 10⁻<sup>2</sup> S cm⁻<sup>1</sup>, attributed to effective Li⁺ coordination and enhanced polymer chain mobility. Dielectric analysis reveals reduced polarization losses above 2&#xa0;kHz, indicating improved electrochemical stability. A prototype sodium-based solid-state cell delivers an open-circuit voltage of 3.1&#xa0;V, sustains a current density of 0.1&#xa0;mA&#xa0;cm⁻<sup>2</sup> for 120&#xa0;h, and demonstrates electrochemical recovery after degradation. Optimal performance is achieved at 15 wt% LiTFSI, while higher salt contents reduce stability. These results highlight the potential of dual-network architecture for advanced solid-state battery electrolytes.</p>

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Poly(Ethylene Oxide)-Based Electrolytes with PEG-Bis-Carbamate Dimethacrylate and Polyaniline: A Dual-Network Self-healing System for Energy Storage Devices

  • 期刊论文

  • 发表日期：

    2026年1月17日

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  • Nacer Badi,
  • Aashis S. Roy,
  • Hatem A. Al-Aoh,
  • Saleh A. Alghamdi,
  • Ayshah S. Alatawi,
  • Abdulrhman M. Alsharari,
  • Ahmed A. Alatawi,
  • Alex Ignatiev

摘要

Solid polymer electrolytes that combine high ionic conductivity, mechanical integrity, and self-healing capability are essential for next-generation solid-state batteries. In this work, a dual-network self-healing polymer electrolyte based on poly(ethylene oxide) (PEO), polyaniline (PANI), and polyethylene glycol bis-carbamate dimethacrylate (PEGCBDMA), doped with lithium bis(trifluoromethanesulfonyl)imide (LiTFSI), is developed. The covalently crosslinked PEGCBDMA network and the conductive PANI phase synergistically enhance ion transport and structural stability. The optimized PEO/PANI–PEGCBDMA:LiTFSI composite exhibits a high ionic conductivity of 1.42 × 10⁻2 S cm⁻1, attributed to effective Li⁺ coordination and enhanced polymer chain mobility. Dielectric analysis reveals reduced polarization losses above 2 kHz, indicating improved electrochemical stability. A prototype sodium-based solid-state cell delivers an open-circuit voltage of 3.1 V, sustains a current density of 0.1 mA cm⁻2 for 120 h, and demonstrates electrochemical recovery after degradation. Optimal performance is achieved at 15 wt% LiTFSI, while higher salt contents reduce stability. These results highlight the potential of dual-network architecture for advanced solid-state battery electrolytes.