Heteroatom preintercalated Cl-terminated Ti₃C₂T_x MXene wrapped with mesoporous Fe₂O₃ nanospheres for improved sodium ion storage

Abstract

Developing multicomponent hybrid materials is an effective method to achieve structural stable anode materials for high-performance sodium-ion batteries (SIBs). In this work, mesoporous Fe2O3 nanospheres wrapped by heteroatoms pre-intercalated Cl-terminated...

Recent Advances and Perspectives of Lewis Acidic Etching Route: An Emerging Preparation Strategy for MXenes

“…SIBs possess a similar working mechanism to LIBs. It is well known that the working voltage of SIBs is lower than that of LIBs, thus resulting in a relatively low energy density of SIBs [179,180]. However, due to the abundance of sodium resources and attractive cost-effectiveness [181], SIBs are promising to be utilized in some fields that do not require high energy density, such as large-scale energy storage [182,183].…”

A review on surface modulation of MXenes and the impact on their work functions and stability

“…[15][16][17][18] Especially, they feature various surface terminations (such as -O, -NH, -N, -S, -F, -Cl, -Br, and -I), which can exert diverse effects on the electronic structure, work function, kinetic stability, atomic spacing, and surface charge of MXenes. [19][20][21][22][23] Taking Ti 3 C 2 T x as an example, the -O and -F functional groups usually enhance its electron affinity and electronegativity, leading to higher work function values of the MXenes, [24][25][26][27] while the -N groups have the capability to create a band gap in Ti 3 C 2 T x , making it more suitable for semiconductor-based applications. 28 The -NH groups can be bonded with hydrogen, tending to decrease the total surface charge and reduce the overall work function of Ti 3 C 2 T x .…”

S- and Cl-functionalized Nb2C MXenes as novel anode materials for sodium-ion batteries: a first-principles study

“…[23][24][25][26][27][28] Recent theoretical investigations and experiments suggest that the energy storage capacities of MXenes strongly depend on the surface terminal functional groups. [29][30][31][32] Therefore, it is of great significance to study the storage capacities associated with surface terminal functional groups to further understand the energy storage mechanisms of MXenes.…”