Mechanism-Informed Interfacial Chemistry and Structural Evolution of TiS₂ During Ca²⁺ Intercalation in Concentrated Aqueous CaCl₂ Electrolytes.

ABSTRACT: This study examines the interfacial and structural evolution of titanium disulfide (TiS₂) during Ca²⁺ intercalation/deintercalation in concentrated aqueous CaCl₂. Electrochemical measurements were combined with ex situ X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), and Raman spectroscopy to characterize the solvation structure, potential window, and reversibility in concentrated CaCl₂ electrolytes. Increasing the CaCl₂ concentration from 1.0 to 8.0 M was accompanied by reduced gas evolution and an expanded practical operating window. Stepwise analysis identified the potential range -1.00 to 0.10 V (vs. the saturated calomel electrode) as a practical window that minimized TiO₂/S₈ formation while p

SUBMITTER: Lee S 

PROVIDER: S-EPMC12733094 | biostudies-literature | 2025 Dec

REPOSITORIES: biostudies-literature