Layered-like structure of TiO2-Ti3C2 Mxene as an efficient sulfur host for room-temperature sodium-sulfur batteries

Abstract

The ideal sulfur supporting material for room-temperature sodium-sulfur (RT-NaS) batteries would con-currently incorporate adsorption capabilities, and high-electrical conductivity, which are essential for improving cycling stability and crucial for enhancing cycling stability and implementation in large-scale applications. In this work, the layered-like structure of TiO2-Ti3C2 Mxene was prepared by a simple hydrothermal method. The prepared TiO2-Ti3C2 material possesses a better optimal structure, which showed the evenly dispersed TiO2 on the Ti3C2 (Ti3C2). The layered-like structure material combines the decrease of volume expansion and the high conductivity of Ti3C2. After being impregnated with sulfur, a significant specific capacity of 255.196 mA h/g was achieved after 1500 cycles at a 1 C-rate with a low-capacity decay. The layered-like structure of TiO2-Ti3C2 prepared by the hydrothermal method is an auspicious cathode material for RT-NaS batteries. (C) 2021 Elsevier B.V. All rights reserved.