Notes in accordions-organized MXene equipped with CeO2 for synergistically adsorbing and catalyzing polysulfides for high-performance lithium-sulfur batteries

Limited by the shuttle effect, the application of lithium-sulfur batteries is not impressive. As an organ layered two-dimensional (2D) material, MXene has a great electrical conductivity and high specific surface area. Meanwhile, the introduction of metal oxides can restrain the shuttle effect. Hence, this paper prepared CeO2/MXene as a cathode material of Li-S batteries. Ce and Ti can chemically adsorb S, and the interlayer structure of MXene can limit S while the interlayer space can alleviate volume expansion. The discharge capacity at 0.5 C is as high as 1051.1 mAh g(-1), and 921.9 mAh g(-1) after 200 cycles. The average coulombic efficiency is 97.75%. The organized MXene with CeO2 like notes in accordions are new efficient materials for lithium-sulfur batteries. (c) 2022 Science Press and Dalian Institute of Chemical Physics, Chinese Academy of Sciences. Published by ELSEVIER B.V. and Science Press. All rights reserved.