The mechanical robustness of highly loaded composite electrodes is important for ensuring the long-term reliability of high-energy-density secondary batteries. Considering that in real state, the electrodes in batteries are completely impregnated with electrolyte, the swelling of the polymeric binder must be carefully observed and controlled to maintain the electric connectivity within the electrode. However, the decrease in the cohesion/adhesion of electrodes caused by electrolyte impregnation has not been directly measured due to the absence of appropriate tools. Here, the surface and interfacial cutting analysis system and a specifically designed sample holder are well combined to realize this breakthrough measurement. When electrode is impregnated with a liquid electrolyte, not only the 12% increase in electrode thickness but also the greater than 74% decrease in cohesion/adhesion, which is caused by the swelling of the amorphous phase of the polymeric binders, is clearly observed. The large decrease in cohesion/adhesion can be greatly ameliorated by controlling both the degree of crystallinity and crystallite size of the polymeric binder through a simple annealing process. Thus, it believes that the measurement of the real cohesion and adhesion of composite electrodes can provide an innovative and practical way to secure the reliability of high-energy-density batteries.

高负载复合电极的机械强度对于确保高能量密度二次电池的长期可靠性至关重要。考虑到在真实状态下，电池中的电极完全充满了电解质，必须仔细观察和控制聚合物粘合剂的溶胀，以维持电极内的电连通性。然而，由于缺少合适的工具，尚未直接测量由电解质浸渍引起的电极内聚/粘附力的降低。在这里，表面和界面切削分析系统与专门设计的样品架完美结合，实现了突破性的测量。当电极浸有液体电解质时，不仅可以清楚地观察到电极厚度增加了12％，而且由于聚合粘合剂的非晶相膨胀导致的内聚/粘附力降低了74％以上。通过简单的退火工艺控制聚合物粘合剂的结晶度和微晶尺寸，可以大大改善内聚/粘附力的大大降低。因此，认为复合电极的实际内聚力和粘附力的测量可以提供一种新颖且实用的方式来确保高能量密度电池的可靠性。通过简单的退火工艺控制聚合物粘合剂的结晶度和微晶尺寸，可以大大改善内聚/粘附力的大大降低。因此，认为复合电极的实际内聚力和粘附力的测量可以提供一种新颖且实用的方式来确保高能量密度电池的可靠性。通过简单的退火工艺控制聚合物粘合剂的结晶度和微晶尺寸，可以大大改善内聚/粘附力的大大降低。因此，认为复合电极的真实内聚力和粘附力的测量可以提供一种新颖且实用的方式来确保高能量密度电池的可靠性。