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Nano‐sized Titanium Nitride Functionalized Separator Improves Cycling Performance of Lithium Sulfur Batteries
Author(s) -
Xu Guiyin,
Yan Qingbo,
Bai Peng,
Dou Hui,
Nie Ping,
Zhang Xiaogang
Publication year - 2019
Publication title -
chemistryselect
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.437
H-Index - 34
ISSN - 2365-6549
DOI - 10.1002/slct.201803285
Subject(s) - polysulfide , separator (oil production) , materials science , electrolyte , sulfur , coating , nitride , titanium , chemical engineering , electrochemistry , titanium nitride , nanotechnology , metallurgy , electrode , chemistry , layer (electronics) , physics , engineering , thermodynamics
High‐energy lithium‐sulfur batteries have been plagued by the poor cyclability due to the soluble lithium polysulfide intermediates into the organic electrolyte. Here, we design a separator functionalized by a simple coating of nanosized titanium nitride and super C65. Lithium‐sulfur batteries with the functional separator achieve a high specific capacity of 935 mAh g −1 at a current density of 0.5 C, and show a super‐long cycling performance at a small degradation rate. The improvement mechanisms introduced by the new separator are further investigated by the electrochemical analysis and theoretical calculation.