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.

Automated summary

Based on MXene, CeO2/MXene was prepared as a cathode material for lithium-sulfur batteries in this study. The introduction of CeO2 and metal adsorbent successfully improved the discharge capacity and cycle stability. The results indicate the great potential of CeO2/MXene for lithium-sulfur batteries.