Zhejiang Sci-Tech University Develops Composite Polymer Electrolyte for Lithium-Metal Batteries

Researchers at Zhejiang Sci-Tech University have developed a fiber-reinforced composite solid polymer electrolyte that addresses conductivity and mechanical strength challenges in lithium-metal batteries. The composite, featuring a PTFE scaffold and the plastic-crystal succinonitrile, achieved an ionic conductivity of 7.6×10⁻⁴ S·cm⁻¹ at 60 °C and demonstrated over 2,500 hours of stable cycling. The study published in the Chinese Journal of Polymer Science emphasizes the potential for safer and longer-lasting energy storage solutions.

Published Mar 20, 2026

Zhejiang Sci-Tech University researchers developed a fiber-reinforced composite solid polymer electrolyte to enhance lithium-metal battery performance. The electrolyte combines a porous PTFE scaffold with succinonitrile, achieving 7.6×10⁻⁴ S·cm⁻¹ ionic conductivity at 60 °C and strong mechanical properties (3.31 MPa tensile strength).

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The composite enabled stable lithium symmetric-cell cycling over 2,500 hours at 0.15 mA·cm⁻² and 91.6% capacity retention in Li//LiFePO₄ full cells after 300 cycles at 0.5C. This design aims to improve safety and longevity in energy storage applications. The research was supported by the National Key Research and Development Program of China.