Lithium Storage Performance of Honeycomb-Like SnS@DAAQ-MWCNTs as an Anode

Abstract

Since petroleum resources on earth are not optimistic, developing clean energy has become a top priority. In this work, SnS@DAAQ-MWCNTs (SDC) with a honeycomb-like structure were successfully prepared by hydrothermal synthesis with SnS and carbon nanotube backbone wrapped in polymer layers as the anode for lithium-ion batteries. The electrode materials were characterized by measurements of SEM, TEM, XPS, XRD, Raman, BET, and TGA. The DAAQ-MWCNTs were found to be enhanced concerning dispersion, bringing better capacitive contribution. The SDC showed good cycling stability by CV and charge–discharge tests, demonstrating an initial discharge capacity of 762.8 mAh g–1 at 1000 mA g–1 and excellent rate performance with a recovery rate of 81.77%. This is ascribed to the special honeycomb-like structure, which enables the electrolyte to infiltrate the SDC electrode material better and swell the specific surface area for active sites.

Arc-Discharge In Situ Synthesis of Dual-Carbonaceous-Layer-Coated SnS Nanoparticles with High Lithium-Ion Storage Capacity

“…In order to address the issues, several approaches have been devised, for example, expanding the interlayer of SnS and regulating its morphologies and sizes. − In addition to these methods, introducing carbonaceous materials like carbon fiber, carbon nanotubes, , graphene has also been regarded as a potent strategy for enhancing the electrochemical effectiveness of SnS. However, three major problems exist in the majority of SnS-based carbon substances reported in the literature for LIBs: (1) The preparation methods are complicated and quite time-consuming.…”