Shuguo Sun, Bo Rui, Xijun Tan, Saurabh Bahuguna, Jun Zhou and Jun Xu
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Effects of electrolyte, state of charge, and strain rate on the mechanical properties of lithium-ion battery electrodes and separators†
The mechanical properties of electrode materials are critical to the mechanical, electrical, and thermal performance, safety, and durability of lithium-ion batteries (LIBs). While mechanical testing is often conducted to elucidate the fundamental behavior of electrode materials, most existing studies focus on dry electrodes, which fail to fully capture the in-cell conditions. To address this gap, this study provides a comprehensive investigation of the coupled effects of SOC, electrolyte, and strain rate on the mechanical behavior of cathodes and anodes through compression and tensile testing. The study begins by isolating the impacts of SOC and electrolyte individually, followed by an analysis of their coupling effects. Scanning electron microscopy (SEM) characterization under diverse conditions is employed to uncover the underlying mechanisms driving these behaviors. Results reveal that the interplay between SOC, electrolyte presence, and strain rate significantly influences the mechanical responses of electrodes. These findings offer critical insights into the behavior of battery components under realistic loading conditions, demonstrating the complexity of the coupling of solid–liquid interactions in porous materials and providing a foundation for improving the evaluation and design of LIB safety and durability.
期刊介绍:
The Journal of Materials Chemistry A, B & C covers a wide range of high-quality studies in the field of materials chemistry, with each section focusing on specific applications of the materials studied. Journal of Materials Chemistry A emphasizes applications in energy and sustainability, including topics such as artificial photosynthesis, batteries, and fuel cells. Journal of Materials Chemistry B focuses on applications in biology and medicine, while Journal of Materials Chemistry C covers applications in optical, magnetic, and electronic devices. Example topic areas within the scope of Journal of Materials Chemistry A include catalysis, green/sustainable materials, sensors, and water treatment, among others.