4.4 Article

N-Doped Carbon Material Derived from Riboflavin as Host of Sulfur for Enhanced Lithium-Sulfur Battery

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CHEMISTRYSELECT
卷 5, 期 9, 页码 2654-2661

出版社

WILEY-V C H VERLAG GMBH
DOI: 10.1002/slct.201904011

关键词

lithium-sulfur battery; N-doped carbon material; riboflavin; sulfur cathode; shuttle effect

资金

  1. Open Project of Fuel Cells & Hybrid Electric Power Key Lab, Chinese Academy of Sciences [KLFC201702]
  2. Open Project from State Key Lab of Catalysis [N-14-1]
  3. Innovative Research Team of Southwest Petroleum University [2015CXTD04]

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Lithium-sulfur battery still has several critical challenges, which severely restrict its practical applications. Nitrogen-doped carbon material (N-C) has not only good electronic conductivity but also stronger chemical adsorption with intermediates of polysulfides, thus can effectively alleviate the shuttle effect. Riboflavin with advantages of cheap and nontoxic carbon/nitrogen source will be used to synthesize N-C, and will be firstly applied as sulfur host. The obtained N-C/S electrode shows initial capacity of 773.6 mAh g(-1) at 0.5 C and capacity retention of 76.6% after 100 cycles, the capacity retention capability is much better than that of XC-72/S electrode with same sulfur content. Even at bigger current density of 1 C, the specific capacity of the battery is still up to 353.3 mAh g(-1). This excellent performance of the N-C/S electrode is ascribed to strong chemical binding of polysulfides to N-C.

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