@article{30114,
  author = {Min Ling and Liang Zhang and Tianyue Zheng and Jun Feng and Jinghua Guo and Liqiang Mai and Gao Liu},
  title = {Nucleophilic substitution between polysulfides and binders unexpectedly stabilizing lithium sulfur battery},
  abstract = {<p>Polysulfide shuttling has been the primary cause of failure in lithium-sulfur (Li-S) battery cycling. Here, we demonstrate an nucleophilic substitution reaction between polysulfides and binder functional groups can unexpectedly immobilizes the polysulfides. The substitution reaction is verified by UV–visible spectra and X-ray photoelectron spectra. The immobilization of polysulfide is <em>in situ</em> monitored by synchrotron based sulfur K-edge X-ray absorption spectra. The resulting electrodes exhibit initial capacity up to 20.4 mAh/cm<sup>2</sup>, corresponding to 1199.1 mAh/g based on a micron-sulfur mass loading of 17.0&nbsp;mg/cm<sup>2</sup>. The micron size sulfur transformed into nano layer coating on the cathode binder during cycling. Directly usage of nano-size sulfur promotes higher capacity of 33.7 mAh/cm<sup>2</sup>, which is the highest areal capacity reported in Li-S battery. This enhance performance is due to the reduced shuttle effect by covalently binding of the polysulfide with the polymer binder.</p>},
  year = {2017},
  journal = {Nano Energy},
  volume = {38},
  pages = {82 - 90},
  month = {01/2017},
  issn = {22112855},
  doi = {10.1016/j.nanoen.2017.05.020},
  language = {eng},
}