In situ reduction and coating of SnS2 nanobelts for free-standing SnS@polypyrrole-nanobelt/carbon-nanotube paper electrodes with superior Li-ion storage

Abstract

In order to meet the high energy requirements of flexible electronic devices, Li-ion batteries should combine high overall energy and power densities, long cycling life, good flexibility, and low cost. In the current work, three-dimensional (3D) free-standing SnS@polyprrole-nanobelt/carbon-nanotube (SnS@PPy-NB/CNT) paper anodes are synthesized using a combined in situ polymerization restriction/bottom-up assembling technique, in which 1D CNTs and SnS@PPy nanobelts are uniformly interconnected. Because their highly conductive and porous properties are beneficial for electronic and ionic transport, the SnS@PPy-NB/CNT paper electrodes show an overall electrode capacity of 757 mA h g⁻¹ (891 mA h g⁻¹ for the SnS@PPy) after 500 cycles at a current density of 1 C and excellent rate performance.