In Situ Polymerized Hybrid Nanofiber Membranes Boost High-Voltage Stability of Solid-State Lithium Metal Batteries.
basic_science · Level V
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- Record sourced from PubMed, PMID 40707213.
- Also identified by DOI 10.1021/acsnano.5c07027.
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Abstract
Solid-state lithium metal batteries, particularly those with solid polymer electrolytes, are regarded as promising solutions to achieve both higher energy density and safety. However, their development has been hampered by limited high-voltage tolerance. To overcome this challenge, we propose integrating a multifunctional hybrid nanofiber membrane with <i>in situ</i> polymerization of vinylene carbonate to create a solid electrolyte with exceptional high-voltage stability and efficient room-temperature performance. The improved compatibility and ionic conductivity arise from dipole-dipole interactions between polar groups and vinylene carbonate. Our approach delivers LiFePO<sub>4</sub>//Li cells with marvelous cycling stability, surpassing 1000 cycles at 1C, and especially shows excellent compatibility with high-voltage Li<sub>3</sub>V<sub>2</sub>(PO<sub>4</sub>)<sub>3</sub> (4.8 V vs Li/Li<sup>+</sup>) and LiNi<sub>0.8</sub>Co<sub>0.1</sub>Mn<sub>0.1</sub>O<sub>2</sub> (4.7 V vs Li/Li<sup>+</sup>). This straightforward yet effective strategy contributes to energy storage with safer and higher-energy-density solid-state lithium metal batteries.