Tungsten Nitride/Carbon Cloth as Bifunctional Electrode for Effective Polysulfide Recycling

Yange Wang, Rongjie Luo, Yingge Zhang, Yan Guo, Yang Lu, Xianming Liu, Jang Kyo Kim, Yongsong Luo

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37 Scopus citations


The inevitable dissolution, diffusion, and migration of polysulfides cause an irreversible loss of active material, leading to poor cyclic performance in lithium sulfur batteries. Herein, a freestanding tungsten nitride nanorod/carbon cloth (WN/CC) interlayer is prepared by hydrothermal growth to function as both current collector and physicochemical barrier to soluble lithium polysulfides (Li2Sx). The cells containing a dual-functional interlayer deliver a significantly improved initial discharge capacity of 1337 mAh g-1 with a reversible capacity of 814.2 mAh g-1 after 500 cycles at 100 mA g-1. The enhanced electrochemical performance is attributed to the highly adsorptive WN nanorods grown on conductive CC to entrap polysulfides, leading to effective recycling of active materials. The density functional theory (DFT) calculations prove important roles of the WN (200) surface in entrapping polysulfides through their strong adsorption energies (3.21-4.67 eV) with Li2Sx and S8. The potential of the dual-functional WN/CC composite interlayer in improving the electrochemical performance of lithium sulfur batteries has not been reported previously.

Original languageBritish English
Pages (from-to)3314-3322
Number of pages9
JournalACS Applied Energy Materials
Issue number5
StatePublished - 28 May 2019


  • DFT calculations
  • dual-functional interlayer
  • interlayer
  • lithium sulfur battery
  • polysulfide adsorption
  • tungsten nitride


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