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<p>Solid electrolyte membranes play a vital role in the practical application of sulfide-based all-solid-state batteries. However, developing electrolyte membranes with outstanding mechanical and (electro-)chemical properties remains a challenge. Herein, a novel low-polarity nitrile butadiene rubber (NBR) + non-polar styrene butadiene rubber (SBR) synergistic binder strategy is adopted to promote the fabrication of wet slurry-based sulfide electrolyte membranes. Notably, binders with different properties not only affect the mechanical properties and ion transport of the electrolyte film but also have a significant impact on the stress resistance of the composite cathode. The all-solid-state battery consists of a high ionic conductivity SBR + NBR membrane (3.67 mS·cm<sup>−1</sup>), LiNi<sub>0.8</sub>Mn<sub>0.1</sub>Co<sub>0.1</sub>O<sub>2</sub> cathode (NMC811), and lithium-metal anode protected by ZnO-graphite, exhibiting excellent cycle stability. The findings deepen comprehension of the effects of binders in solid-state batteries and provide a direction for enhancing all-solid-state battery technology.</p> Graphical abstract <p></p>

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Strategy for synergistic binders in sulfide-based solid electrolyte membrane

  • 期刊论文

  • 发表日期：

    2025年5月22日

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  • Peng-Fei Ren,
  • Si-Dong Zhang,
  • Cheng Chen,
  • Qi Yang,
  • Rui-Ping Liu

摘要

Solid electrolyte membranes play a vital role in the practical application of sulfide-based all-solid-state batteries. However, developing electrolyte membranes with outstanding mechanical and (electro-)chemical properties remains a challenge. Herein, a novel low-polarity nitrile butadiene rubber (NBR) + non-polar styrene butadiene rubber (SBR) synergistic binder strategy is adopted to promote the fabrication of wet slurry-based sulfide electrolyte membranes. Notably, binders with different properties not only affect the mechanical properties and ion transport of the electrolyte film but also have a significant impact on the stress resistance of the composite cathode. The all-solid-state battery consists of a high ionic conductivity SBR + NBR membrane (3.67 mS·cm−1), LiNi0.8Mn0.1Co0.1O2 cathode (NMC811), and lithium-metal anode protected by ZnO-graphite, exhibiting excellent cycle stability. The findings deepen comprehension of the effects of binders in solid-state batteries and provide a direction for enhancing all-solid-state battery technology.

Graphical abstract