Cited 12 time in webofscience Cited 13 time in scopus

Revisiting the Role of Conductivity and Polarity of Host Materials for Long-Life Lithium-Sulfur Battery

Title
Revisiting the Role of Conductivity and Polarity of Host Materials for Long-Life Lithium-Sulfur Battery
Authors
Lee, Byong-JuneKang, Tong-HyunLee, Ha-YoungSamdani, JitendraJung, YongjuZhang, ChunfeiYu, ZhouXu, Gui-LiangCheng, LeiByun, SeoungwooLee, Yong MinAmine, KhalilYu, Jong-Sung
DGIST Authors
Lee, Byong-June; Kang, Tong-Hyun; Lee, Ha-Young; Samdani, Jitendra; Jung, Yongju; Zhang, Chunfei; Yu, Zhou; Xu, Gui-Liang; Cheng, Lei; Byun, Seoungwoo; Lee, Yong Min; Amine, Khalil; Yu, Jong-Sung
Issue Date
2020-06
Citation
Advanced Energy Materials, 10(22), 1903934
Type
Article
Article Type
Article; Early Access
Author Keywords
cycle stabilitylithium-sulfur batteriesmesoporous silicapolaritysulfur hosts
Keywords
COMPOSITE CATHODE MATERIALSORDERED MESOPOROUS CARBONRATE CAPABILITYS BATTERIESPERFORMANCESHELLNANOPARTICLESSTRATEGIESSEPARATORDIFFUSION
ISSN
1614-6832
Abstract
Despite their high theoretical energy density and low cost, lithium–sulfur batteries (LSBs) suffer from poor cycle life and low energy efficiency owing to the polysulfides shuttle and the electronic insulating nature of sulfur. Conductivity and polarity are two critical parameters for the search of optimal sulfur host materials. However, their role in immobilizing polysulfides and enhancing redox kinetics for long-life LSBs are not fully understood. This work has conducted an evaluation on the role of polarity over conductivity by using a polar but nonconductive platelet ordered mesoporous silica (pOMS) and its replica platelet ordered mesoporous carbon (pOMC), which is conductive but nonpolar. It is found that the polar pOMS/S cathode with a sulfur mass fraction of 80 wt% demonstrates outstanding long-term cycle stability for 2000 cycles even at a high current density of 2C. Furthermore, the pOMS/S cathode with a high sulfur loading of 6.5 mg cm−2 illustrates high areal and volumetric capacities with high capacity retention. Complementary physical and electrochemical probes clearly show that surface polarity and structure are more dominant factors for sulfur utilization efficiency and long-life, while the conductivity can be compensated by the conductive agent involved as a required electrode material during electrode preparation. The present findings shed new light on the design principles of sulfur hosts towards long-life and highly efficient LSBs. © 2020 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
URI
http://hdl.handle.net/20.500.11750/11898
DOI
10.1002/aenm.201903934
Publisher
Wiley-VCH Verlag
Related Researcher
  • Author Lee, Yong Min Battery Materials & Systems LAB
  • Research Interests Battery; Electrode; Electrolyte; Separator; Simulation
Files:
There are no files associated with this item.
Collection:
Department of Energy Science and EngineeringBattery Materials & Systems LAB1. Journal Articles
Department of Energy Science and EngineeringLight, Salts and Water Research Group1. Journal Articles


qrcode mendeley

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

BROWSE