Enveloping ultrathin Ti₃C₂ nanosheets on carbon fibers: a high-density sulfur loaded lithium–sulfur battery cathode with remarkable cycling stability

Abstract

The Ti3C2@CF–S cathode features high sulfur loading capacity, strong polysulfide attachment, superior pulverization inhibiting properties, and demonstrates remarkable cycling stability.

Status and Prospects of MXene‐Based Lithium–Sulfur Batteries

“…Reproduced with permission. [ 128 ] Copyright 2020, Royal Society of Chemistry. f) Schematic of the fabrication process, g) SEM image, and h) cycle performance of the MXene/graphene aerogel electrode.…”

“…1D carbon fibers with micrometer‐scale diameter and good conductivity are also good candidates to combine with MXenes, from which the MXene nanosheets could well spread out to form uniform MXene@carbon fiber composite (Figure 7d). [ 128 ] When loading the C/S slurry in the MXene@carbon fiber composite framework, the MXene nanosheets not only inhibited the shuttle effect and provided fast electron transfer, but also enhanced the ductility of the carbon fibers to withstand the volume expansion of sulfur. Therefore, the Ti 3 C 2 @carbon fiber–S cathode with a uniform thin‐layer sulfur loading of 4 mg cm −2 exhibited an initial capacity of 1058.4 mAh g −1 with 59.1% retention after 1000 cycles at 1 C (Figure 7e).…”

“…d) Schematic and e) cycle performance of the Ti 3 C 2 @carbon fiber-S composite cathode. Reproduced with permission [128]. Copyright 2020, Royal Society of Chemistry.…”

High‐performance nanostructure Fe 2 O 3 synthesized via novel direct current electric arc method as sulfur‐wrapping matrix for lithium‐sulfur batteries

“…[5][6][7][8][9] Right now, the main types of matrix materials include carbon, inorganic metal compounds, conductive polymers, etc. [10][11][12][13] Carbon materials due to their stable structure, abundant pore structure and high conductivity are taken the lead in applying to the sulfurwrapping matrix material for many years. 14,15 Compared with carbon materials, inorganic metal compounds have a variety of chemical compositions, complex crystal and stronger sulfur adsorption, which have attracted extensive attention for a long time.…”

“…To solve these problems, many researchers propose developing high‐performance matrix materials to immobilize sulfur onto its surface via physical and chemical adsorption, so as to inhibit the shuttle effect of polysulfide and improve the sulfur conductivity 5‐9 . Right now, the main types of matrix materials include carbon, inorganic metal compounds, conductive polymers, etc 10‐13 . Carbon materials due to their stable structure, abundant pore structure and high conductivity are taken the lead in applying to the sulfur‐wrapping matrix material for many years 14,15 .…”