A New Concept of a Porous Carbon Interlayer Impregnated with Sulfur for Long‐Life and High‐Energy LiS Batteries

• Published in: Bulletin of the Korean Chemical Society Vol. 40; no. 1; pp. 24 - 28
• Main Authors: Park, Jong Won, Kang, Jin Kyeong, Koh, Jeong Yoon, Kim, Seok, Jung, Yongju
• Format: Journal Article
• Language: English
• Published: Weinheim Wiley‐VCH Verlag GmbH & Co. KGaA 01.01.2019; 대한화학회
• Subjects: Areal capacity; High energy density; LiS batteries; Sulfur‐containing interlayer; 화학
• ISSN: 1229-5949; 0253-2964; 1229-5949
• DOI: 10.1002/bkcs.11633

We present a new interlayer concept for the realization of high‐energy‐density LiS batteries. Disordered mesoporous carbons replicated by silica nanoparticles were partially filled with sulfur via a melt‐diffusion method. Sulfur‐impregnated disordered mesoporous carbon (DMC‐S) composites were used as an interlayer between a cathode and anode to provide additional active materials for a LiS cell. The LiS cell with the DMC‐S interlayer exhibited an approximately two‐fold increase in areal capacity compared with the control cell without an interlayer. DMC‐S composites offer the unique advantage of acting as a porous framework to accommodate active materials and suppress polysulfide diffusion. We propose that this new approach provides a viable path for the development of LiS batteries with a high‐energy density and excellent cycling stability.