Nano‐sized Titanium Nitride Functionalized Separator Improves Cycling Performance of Lithium Sulfur Batteries. Issue 2 (14th January 2019)

• Record Type: Journal Article
• Authors: Xu, Guiyin; Yan, Qing‐bo; Bai, Peng; Dou, Hui; Nie, Ping; Zhang, Xiaogang
• Is Part Of: ChemistrySelect. Volume 4:Issue 2(2019)
• Page Start: 698
• Page End: 704
• Publication Date: 2019-01-14
• Subjects: Lithium sulfur batteries -- Functional separator -- Titanium nitride -- Adsorbent -- Sealant; Chemistry -- Periodicals; 540.5
• DOI: 10.1002/slct.201803285
• Languages: English
• ISSNs: 2365-6549

Abstract

Abstract: 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. Abstract : A layer of nano titanium nitride and carbon black was coated onto commercial polypropylene separator, exhibiting a superior electrochemical performance for lithium sulfur batteries. The multifunctional effects of the new composite separator for lithium sulfur batteries were systematically studied by the electrochemical test and theoretical calculation.