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Investigates solid electrolyte interphase in sodium-ion batteries, suggesting optimal surface chemistry design guidelines.
We investigate the influence of pyrolysis temperature, binder type, and electrolyte formulation on solid electrolyte interphase (SEI) formation in hard carbon (HC) anodes for sodium‐ion batteries. Through X‐ray photoemission spectroscopy (XPS), electrochemical testing, and Raman spectroscopy, we demonstrate that HC pyrolyzed at 1100 °C and combined with CMC binder and NaTFSI/FEC electrolyte forms a thinner, chemically stable SEI. This configuration enhances cycling performance by minimizing insulating species and promoting interfacial stability. The study provides design guidelines for optimizing surface chemistry in HC‐based SIBs.
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Gammaitoni et al. (2026) studied this question.
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