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首页> 外文期刊>ACS applied materials & interfaces >Mussel-Inspired Conductive Polymer Binder for Si-Alloy Anode in Lithium-Ion Batteries
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Mussel-Inspired Conductive Polymer Binder for Si-Alloy Anode in Lithium-Ion Batteries

机译：用于锂离子电池的Si-合金阳极的贻贝风格的导电聚合物粘合剂

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摘要

The excessive volume changes during cell cycling of Si-based anode in lithium ion batteries impeded its application. One major reason for the cell failure is particle isolation during volume shrinkage in delithiation process, which makes strong adhesion between polymer binder and anode active material particles a highly desirable property. Here, a biomimetic side-chain conductive polymer incorporating catechol, a key adhesive component of the mussel holdfast protein, was synthesized. Atomic force microscopy-based single-molecule force measurements of mussel-inspired conductive polymer binder contacting a silica surface revealed a similar adhesion toward substrate when compared with an effective Si anode binder, homo-poly(acrylic acid), with the added benefit of being electronically conductive. Electrochemical experiments showed a very stable cycling of Si-alloy anodes realized via this biomimetic conducting polymer binder, leading to a high loading Si anode with a good rate performance. We attribute the ability of the Si-based anode to tolerate the volume changes during cycling to the excellent mechanical integrity afforded by the strong interfacial adhesion of the biomimetic conducting polymer.
机译：锂离子电池中Si基阳极细胞循环过程中的过度体积变化阻碍了其应用。细胞衰竭的一个主要原因是在脱轨过程中体积收缩期间的颗粒分离，这使得聚合物粘合剂和阳极活性材料颗粒之间具有强烈的粘附性是非常理想的性质。这里，合成了掺入儿茶酚的生物浸侧链导电聚合物，该侧链导电聚合物是贻贝组合蛋白的关键粘合剂组分。与有效的Si阳极粘合剂，Homo-polylic（丙烯酸）相比，贻贝吸入的导电聚合物粘合剂的基于原子力显微分子力测量的贻贝式导电聚合物粘合剂的单分子力测量显示出朝向衬底的相似粘附性。电子导电。电化学实验显示通过该仿生传导聚合物粘合剂实现的Si-alloy阳极的非常稳定的循环，导致具有良好速率性能的高负载Si阳极。我们归因于基于Si的阳极在循环期间容忍体积变化的能力，以通过仿生传导聚合物的强界面粘附提供优异的机械完整性。

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