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.
Understanding the Surface Chemistry of Sodium Battery Electrodes in Hard Carbon Anodes / Gammaitoni, G., Coratti, S., Amato, F., Marrani, A.G., Brutti, S., Greco, G.. - In: PHYSICA STATUS SOLIDI. A, APPLICATIONS AND MATERIALS SCIENCE. - ISSN 1862-6319. - 223:11(2026). [10.1002/pssa.202500943]
Understanding the Surface Chemistry of Sodium Battery Electrodes in Hard Carbon Anodes
Gammaitoni G.;Amato F.;Marrani A. G.;Brutti S.;Greco G.
2026
Abstract
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.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
