Abstract
Titanium disulfide (TiS2) was adopted as a negative electrode material for the asymmetric sodium-ion supercapattery of TiS2/activated carbon using Na+-based organic electrolytes. This type of supercapattery possesses a working voltage as high as 3 V. The physical properties of the negative electrode were characterized by X-ray diffraction, scanning electron microscopy and X-ray photoelectron spectroscopy. The electrochemical performance tests revealed that the supercapattery had a relatively high rate performance and good cycle stability, displaying 77% capacity retention after 1000 cycles at a current density of 0.2 A g−1.
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