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A main hurdle for the commercial application of lithium–sulfur (Li–S) batteries lies in inadequate loading of sulfur due to a huge volume change over charging–discharging, poor electric conductivity of sulfur and associated sulfides, and the shuttling effect of lithium polysulfides (LiPS). Herein, a universal “three‐region” configuration including: Region I (sulfur source region), Region II (LiPS...
In article number 1802443, Xiao‐Dong Zhu, Yi‐Tao Liu, and co‐workers report unique solvothermal growth of TiO2 quantum dots (QDs) on ultrathin MXene nanosheets. Through remarkable synergies, the resulting TiO2 QDs@MXene nanohybrids exhibit significantly improved long‐term cyclability and rate capability as a sulfur host, disclosing a new opportunity toward fast and stable Li–S batteries.
Being conductive and flexible, 2D transition metal nitrides and carbides (MXenes) can serve in Li–S batteries as sulfur hosts to increase the conductivity and alleviate the volume expansion. However, the surface functional groups, such as OH and F, weaken the ability of bare MXenes in the chemisorption of polysulfides. Besides, they create numerous hydrogen bonds which make MXenes liable to restack,...
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