Rational design of MXene@TiO₂ nanoarray enabling dual lithium polysulfide chemisorption towards high-performance lithium–sulfur batteries

Abstract

Lithium-sulfur (Li-S) batteries face a few vital issues, including poor conductivity, severe volume expansion/contraction, and especially the detrimental shuttle effect during the long-term electrochemical process. Herein, we designed a hierarchical...

Investigation and Optimization of Mxene Functionalized Mesoporous Titania Films as Efficient Photoelectrodes

“…Mxene was prepared through a conventional method based upon selective etching of Ti 3 AlC 2 powder in HF solution [35][36][37][38][39]. Commercial Ti 3 AlC 2 powder (>98 wt% purity) was used without further purification.…”

Strategies for Fabricating High‐Performance Electrochemical Energy‐Storage Devices by MXenes

“…As a result, the interlayer distance increased from 1.01 to 1.30 nm, as shown in Figure 20 (a) and (b), which was possibly due to the formation of anatase TiO 2 on the edge planes of MXenes. [206,207,208] The capacity of the TiO 2 /Ti 3 C 2 composite electrode was better than that of the counterpart prepared with pure Ti 3 C 2 (237 versus 130 mAh g À 1 at 100 mA g À 1 ), which was due to the synergistic pillar-free anatase TiO 2 /Ti 3 C 2 illustrating the expanded interlayer distance from 1.01 to 1.30 nm. [206] Reproduced with permission from Ref.…”

“…[206] Recently, Ti 3 C 2 @TiO 2 nanoarrays prepared by in situ solvothermal process with an annealing treatment were successfully applied as the sulphur host in lithium-sulphur batteries, in which the restacking of MXenes was eliminated by the formation of TiO 2 nanoarrays, as shown in Figure 20 (c). [208] Additionally, the polysulphides were effectively trapped by the polar-polar interaction due to the polarity of TiO 2 , and the Lewis acid-base mechanism owing to the abundant acid metal sites on the surface of MXenes.…”

“…Copyright 2020 Elsevier. (c) Schematic structure of Ti 3 C 2 @TiO 2 nanoarray illustrating the hierarchical architecture of the composite [208]. Reproduced with permission from Ref [208]…”

Investigation and Optimization of Mxene functionalized Mesoporous Titania Films as Efficient Photoelectrodes

“…MXene was prepared through a conventional method based upon selective etching of Ti3AlC2 powder in HF solution [36][37][38][39][40]. Commercial Ti3AlC2 powder (> 98 wt% purity) was used without further purification.…”