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Reversible Crosslinked Polymer Binder for Recyclable Lithium Sulfur Batteries with High Performance

机译：可逆交联聚合物粘合剂，具有高性能的可回收锂硫电池

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摘要

Owing to the negative impact of the extensive utilization of batteries on the environment, sustainability of the cells needs to be included in the systemic research of batteries. Herein, a dissolvable ionic crosslinked polymer (DICP) is exploited as a binder for lithium-sulfur batteries by crosslinking the polyacrylic acid and polyethyleneimine through carboxy-amino ionic interaction. This interaction is pH-controlled, and therefore, the crosslinked binder network can be readily dissociated under basic conditions, providing a facile strategy enabling valuable components recycled through a convenient washing method. The sulfur cathode prepared using the recycled carbon-sulfur composite can deliver comparable capacity as that of fresh electrode. In addition, evidence from cell performance and characterizations, such as in situ X-ray absorption spectroscopy, in situ UV-visible spectroscopy, X-ray photoelectron spectroscopy, and density functional theory calculation, confirms that DICP is a more effective binder than its commercial counterpart on suppressing polysulfide dissolution in the electrolyte. Exploiting reversible crosslinked polymer binder for recyclable Li-S batteries with ameliorated electrochemical performance, this study illuminates sustainable development for large-scale energy storage systems.
机译：由于由于电池的广泛利用对环境的负面影响，细胞的可持续性需要包括在电池的系统性研究中。这里，通过通过羧基 - 氨基离子相互作用交联通过交联聚乙烯酸和聚乙烯亚胺，将可溶解的离子交联聚合物（DICP）作为锂 - 硫电池的粘合剂进行利用。该相互作用是pH控制的，因此，交联的粘合剂网络可以在基本条件下容易地解离，提供一种容易策略，使通过方便的洗涤方法再循环有价值的组分。使用再循环的碳 - 硫复合材料制备的硫阴极可以提供与新鲜电极的相当容量。此外，来自细胞性能和表征的证据，例如原位X射线吸收光谱，原位UV可见光光谱，X射线光电子能谱和密度官能理论计算，证实DICP比其商业更有效抑制电解质中多硫化物溶解的对应物。该研究利用具有改善电化学性能的可回收Li-S电池的可逆交联聚合物粘合剂，阐明了大型能量存储系统的可持续发展。

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  • 来源
    《Advanced Functional Materials》 |2020年第36期|2003605.1-2003605.9|共9页
  • 作者

    Liu Zhimeng; He Xin; Fang Chen; Camacho-Forero Luis E.; Zhao Yangzhi; Fu Yanbao; Feng Jun; Kostecki Robert; Balbuena Perla B.; Zhang Junhua; Lei Jingxin; Liu Gao;

  • 作者单位

    Lawrence Berkeley Natl Lab Energy Storage & Distributed Resources Div Berkeley CA 94720 USA|Sichuan Univ Polymer Res Inst State Key Lab Polymer Mat Engn Chengdu 610065 Peoples R China;

    Lawrence Berkeley Natl Lab Energy Storage & Distributed Resources Div Berkeley CA 94720 USA;

    Lawrence Berkeley Natl Lab Energy Storage & Distributed Resources Div Berkeley CA 94720 USA;

    Lawrence Berkeley Natl Lab Energy Storage & Distributed Resources Div Berkeley CA 94720 USA|Texas A&M Univ Dept Chem Engn College Stn TX 77843 USA;

    Lawrence Berkeley Natl Lab Energy Storage & Distributed Resources Div Berkeley CA 94720 USA;

    Lawrence Berkeley Natl Lab Energy Storage & Distributed Resources Div Berkeley CA 94720 USA;

    Lawrence Berkeley Natl Lab Adv Light Source Berkeley CA 94720 USA;

    Lawrence Berkeley Natl Lab Energy Storage & Distributed Resources Div Berkeley CA 94720 USA;

    Texas A&M Univ Dept Chem Engn College Stn TX 77843 USA;

    Sichuan Univ Polymer Res Inst State Key Lab Polymer Mat Engn Chengdu 610065 Peoples R China;

    Sichuan Univ Polymer Res Inst State Key Lab Polymer Mat Engn Chengdu 610065 Peoples R China;

    Lawrence Berkeley Natl Lab Energy Storage & Distributed Resources Div Berkeley CA 94720 USA;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    binder; high sulfur loading; recyclable Li-S batteries;

    机译：粘合剂;高硫负载;可回收LI-S电池;

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