Bulletin of the Korean Chemical Society

Korean Chemical Society (대한화학회)
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Mesoporous Carbon Additives for Long Cycle Life Sulfur Cathodes of Li-S Batteries

  • Koh, Jeong Yoon (Department of Chemical Engineering, Korea University of Technology and Education (KOREATECH)) ;
  • Kim, Tae Jeong (Department of Chemical Engineering, Korea University of Technology and Education (KOREATECH)) ;
  • Park, Min-Sik (Advanced Batteries Research Center, Korea Electronics Technology Institute) ;
  • Kim, Eun Hee (Department of Chemical Engineering, Korea University of Technology and Education (KOREATECH)) ;
  • Kim, Seok (Department of Chemical Engineering, Pusan National University) ;
  • Kim, Ki Jae (Advanced Batteries Research Center, Korea Electronics Technology Institute) ;
  • Yu, Ji-Sang (Advanced Batteries Research Center, Korea Electronics Technology Institute) ;
  • Kim, Young-Jun (Advanced Batteries Research Center, Korea Electronics Technology Institute) ;
  • Jung, Yongju (Department of Chemical Engineering, Korea University of Technology and Education (KOREATECH))
  • Received : 2014.07.07
  • Accepted : 2014.07.31
  • Published : 2014.11.20
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Abstract

We examine the potential use of disordered mesoporous carbon as a functional additive for confining dissolved Li-polysulfides and improving the cycling performance of Li-S batteries. To promote a better understanding of the correlation between the total pore volume of disordered mesoporous carbon and the cycling performance of Li-S batteries, a series of disordered mesoporous carbons with different total pore volumes are successfully synthesized using a commercial silica template. Based on the electrochemical and structural analyses, we suggest that the total pore volume of disordered mesoporous carbon is a predominant factor in determining its capability for either the absorption or adsorption of Li-polysulfides, which is primarily responsible for enhancing the cycling performance. The addition of disordered mesoporous carbon is also effective in enhancing the homogeneous distribution of active sulfur in the cathode, thereby affecting the cycling performance.

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