Ti₃C₂T_x-Based Electrodes with Enhanced Pseudocapacitance for High-Performance Lithium-ion Batteries

Abstract

Ti3C2Tx, a new type of two-dimensional material, is a prospective anode material in lithium-ion batteries (LIBs) for its low lithium-ion diffusion barrier, high conductivity and many other excellent properties. In this paper, multilayer Ti3C2Tx and delaminated Ti3C2Tx samples are prepared by etching Ti3AlC2 powder with HF and [Formula: see text], respectively. We explore the application of the two samples in LIBs, and analyze their electrochemical behavior and kinetic mechanism. At the current densities of 0.1[Formula: see text]A[Formula: see text]g[Formula: see text], the delaminated Ti3C2Tx electrode delivered higher capacities of 255[Formula: see text]mAh[Formula: see text]g[Formula: see text] than multilayer Ti3C2Tx electrode (100[Formula: see text]mAh[Formula: see text]g[Formula: see text]). Even after 1000 cycles, the specific capacity of the delaminated Ti3C2Tx is still up to 205[Formula: see text]mAh[Formula: see text]g[Formula: see text] at 1[Formula: see text]A[Formula: see text]g[Formula: see text]. This work proves the great potential of the delaminated Ti3C2Tx for lithium-ion storage.

A Review of the Effects of Electrode Fabrication and Assembly Processes on the Structure and Electrochemical Performance of 2D MXenes

“…The impacts of structure and morphology on the electrochemical properties of electrodes have been the subject of much research in the energy storage field. [84][85][86][87][88][89] When the electrode material is a 2D material, the morphology of the electrode can significantly affect its electronic and ionic conductivities. In the case of solution-processed 2D materials such as rGO and MXene, the 2D flakes tend to restack to form multilayers during various stages of materials synthesis and electrode fabrication process.…”

Hollow Ti3C2 MXene/Carbon Nanofibers as an Advanced Anode Material for Lithium‐Ion Batteries

“…The active material and binder were mixed in a weight ratio of 9 : 1 in N-methyl-2-pyrrolidone (NMP, Sigma-Aldrich) and coated onto Cu foil using a doctor blade method. [11,37,38,39,40] ChemElectroChem MX/C paste electrode: For the preparation of MX/C electrode, carbon black was added as a conductive additive to the previously described MX paste electrode. The active materials, the binder, and the conductive additive were mixed in a weight ratio of 7 : 1 : 2 in NMP and coated onto Cu foil using a doctor blade method.…”

“…Figure 5. Comparison of the electrochemical capacity of MXene-based and MXene-composite-based batteries at various current densities [11,37,38,39,40]. …”