Open AccessMCNT/MoS2 promoting the electrochemical performance of lithium-sulfur batteries by adsorption polysulfide
Author(s) -
Weimin Guo,
Qi Zhu,
Qinghua Lu
Publication year - 2020
Publication title -
materials research express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.383
H-Index - 35
ISSN - 2053-1591
DOI - 10.1088/2053-1591/ab6766
Subject(s) - polysulfide , electrochemistry , materials science , composite number , cathode , lithium–sulfur battery , battery (electricity) , lithium (medication) , composite material , chemical engineering , electrode , chemistry , electrolyte , medicine , power (physics) , physics , quantum mechanics , engineering , endocrinology
Li–S battery has high theoretical specific capacity and specific energy, but the shuttle effect challenges its commercial application. So many composite materials had been prepared to conquer it. In this research, MCNT/MoS 2 /S composite and MCNT/MoS 2 /S composite cathode were prepared respectively by a facile hydrothermal method and by melt diffusion method. MoS 2 and MCNT showed uniformly combined together by SEM and TEM. The electrochemical properties of the MCNT/MoS 2 /S cathode were carried out on a Gamry electrochemical workstation. The initial capacity arrive 820 mAh·g −1 at 0.1 C, and specific capacities up to ∼460 mAh·g −1 over more than 300 cycles at 0.5 C. The improvement of electrochemical performance due to MoS 2 strongly adsorbing polysulfide and the conductivity network of MCNT.