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<p>Polymer binders contribute a significant part in enhancing the basic stability and steadiness of the electrode to a greater extent. Nevertheless, extensively employed electrochemically inactive binders like PVDF are incapable of providing any extra benefits and merely act as an inert binder. Multi-functional binders with varying properties are currently used in lithium sulfur batteries (LSBs) to overcome their basic challenges. Herein, polyvinyl alcohol-poly 2-acrylamido 2-methyl 1-propane sulfonic acid blend (PVA-PAAMPS) is employed as a multi-functional aqueous binder for LSBs. The polymer binder revealed superior adhesion and better polysulfide confinement ability, and promoted ionic transport. As a result, the cell showed an initial discharge capacity of 1264 mAh g<sup>−1</sup> at 0.1 C with 89% retention in capacity after 100 charge-discharges. Furthermore, the cell revealed 815 mAh g<sup>−1</sup> capacity at 0.5 C rate, maintaining 72% of its initial capacity even after 500 cycles. The enhanced electrochemical results imply the potential of the aqueous blended polymer as an effectual binder for better-performing LSBs.</p>

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Aqueous processable polymer blend as a multifunctional binder for advanced Li–S batteries

  • 期刊论文

  • 发表日期：

    2025年4月23日

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  • Sreekala Kunhi Kannan,
  • Jithu Joseph,
  • Haritha Hareendrakrishnakumar,
  • Mary Gladis Joseph

摘要

Polymer binders contribute a significant part in enhancing the basic stability and steadiness of the electrode to a greater extent. Nevertheless, extensively employed electrochemically inactive binders like PVDF are incapable of providing any extra benefits and merely act as an inert binder. Multi-functional binders with varying properties are currently used in lithium sulfur batteries (LSBs) to overcome their basic challenges. Herein, polyvinyl alcohol-poly 2-acrylamido 2-methyl 1-propane sulfonic acid blend (PVA-PAAMPS) is employed as a multi-functional aqueous binder for LSBs. The polymer binder revealed superior adhesion and better polysulfide confinement ability, and promoted ionic transport. As a result, the cell showed an initial discharge capacity of 1264 mAh g−1 at 0.1 C with 89% retention in capacity after 100 charge-discharges. Furthermore, the cell revealed 815 mAh g−1 capacity at 0.5 C rate, maintaining 72% of its initial capacity even after 500 cycles. The enhanced electrochemical results imply the potential of the aqueous blended polymer as an effectual binder for better-performing LSBs.