Constructing Carbon Nanotube-Optimized Hollow Ti3c2 Mxene Hierarchical Conductive Networks for Robust Lithium-Sulfur Batteries

Rational design of nitrogen-doping Ti3C2Tx microspheres with enhanced polysulfide catalytic activity for lithium-sulfur batteries

“…As first proposed by Naguib et al in 2011, they are expressed as M n+1 X n T x (n = 1-3), where M represents transition metal; X stands for C or/and N elements; T x is the symbol of functional groups on the surface of MXenes [16] . It is impressive that MXenes have the following advantages for Li-S batteries compared to traditional carbon materials: (1) inherent metal conductivity [17,18] ; (2) two-dimensional surface with high activity [19,20] ; (3) large binding energy with LiPSs based on Lewis's interaction to inhibit shuttle effect [21,22] ; and (4) effective catalytic effect on the conversion of LiPSs achieved by abundant surface terminations [23,24] . It is these advantages that make MXenes also have excellent performance in other metal-sulfur batteries [25][26][27] .…”