TiS2 As Negative Electrode Material for Sodium-Ion Electric Energy Storage Devices

Titanium disulfide (TiS2) was synthesized by a simple solid phase method. The physical properties of TiS2 were investigated using X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), and energy dispersive X-ray spectroscopy (EDX). Scanning and transmission electron microscopy (SEM and TEM) were used to study the structural and morphological characteristics. The synthesized TiS2 was applied as negative electrode material for TiS2/graphite electric storage devices with organic electrolytes based on Na+-ions. The electrochemical methods were used to characterize the charge storage mechanism of TiS2. The TiS2/graphite electric energy storage device possessed a working voltage of 3.5 V. The fabricated device showed relatively high performance rate and excellent cycle stability in electrochemical tests.