TiS2–MWCNT hybrid as high performance anode in lithium-ion battery

Abstract

The present work reports the preparation of hybrids by simple dry grinding of titanium sulfide (TiS2) and multi-walled carbon nanotubes (MWCNTs) in different weight ratio and their characterization. X-ray diffraction and Raman studies indicated the presence of interaction between the TiS2 and MWCNT. Field emission scanning electron microscopy and high resolution transmission electron microscopy showed the formation of three-dimensional architecture and co-dispersion in TiS2–MWCNT (1:1) hybrid. X-ray photoelectron spectroscopy also confirmed the presence of TiS2 and MWCNT in the prepared hybrid. Thermogravimetric analysis indicated an increase in thermal stability with higher MWCNT content. The results of the electrochemical analyses indicated that TiS2–MWCNT (1:1) hybrid exhibited an enhanced performance as lithium-ion battery anode. The initial specific capacity was found to be ≈450 mAh g−1 with 80 % retention in capacity after 50 discharge–charge cycles. These values are significantly higher compared to those for TiS2, MWCNT or other TiS2–MWCNT hybrids. Such improved performance is attributed to the presence of a synergistic effect between TiS2 and MWCNT.