Surface and interfacial cutting analysis system for adhesive strength measurement in rechargeable lithium batteries

Abstract

The adhesive strength of composite electrodes in rechargeable batteries significantly affects their long-term reliability and electrochemical performance. As an alternative to the conventional peel test, the surface and interfacial cutting analysis system (SAICAS) offers an advanced characterization of adhesive strength through precise force measurements with a microblade at microscale depths. This review comprehensively summarizes the recent progress in SAICAS applications for measuring the adhesive properties of lithium-ion battery (LIB) electrodes and ceramic-coated separators under various conditions such as liquid electrolyte impregnation (i.e., wet adhesion). In addition, SAICAS applications extend beyond LIBs to all-solid-state, lithium‑sulfur, and aqueous Zn-ion batteries. However, because these studies have only reported measured results without standard measurement protocols, this review critically examines them to suggest better measurement conditions or provide more reasonable discussion points. This leads to a better understanding of adhesive strength and suggests agreed-upon measurement protocols depending on the battery type or measurement conditions.