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This content will become publicly available on April 19, 2019

Title: High-Rate and Long-Term Cycle Stability of Li–S Batteries Enabled by Li 2S/TiO 2-Impregnated Hollow Carbon Nanofiber Cathodes

The high theoretical energy density of lithium-sulfur (Li-S) batteries makes them an alternative battery technology to lithium ion batteries. However, Li-S batteries suffer from low sulfur loading, poor charge transport, and dissolution of lithium polysulfide. Here, we use the lithiated S, Li 2S, as the cathode material, coupled with electrospun TiO 2-impregnated hollow carbon nanofibers (TiO 2-HCFs), which serve as the conductive agent and protective barrier for Li 2S in Li-S batteries. TiO 2-HCFs provide much improved electron/ionic conductivity and serve as a physical barrier, which prevents the dissolution of lithium polysulfides. The Li 2S/TiO 2-HCF composite delivers a discharge capacity of 851 mA h g Li2S -1 at 0.1C and the bilayer TiO 2-HCFs/Li 2S/TiO 2-HCF composite delivers a high specific capacity of 400 mA h g Li2S -1 at 5C.
Authors:
 [1] ;  [2] ;  [3] ;  [3] ;  [1] ; ORCiD logo [2]
  1. Chinese Academy of Sciences (CAS), Beijing (China). National Engineering Lab. for Hydro metallurgical Cleaner Production Technology, Key Lab. of Green Process and Engineering and Inst. of Process Engineering; Univ. of Chinese Academy of Sciences (CAS), Beijing (China)
  2. Argonne National Lab. (ANL), Lemont, IL (United States). Chemical Sciences and Engineering Division
  3. Chinese Academy of Sciences (CAS), Beijing (China). National Engineering Lab. for Hydro metallurgical Cleaner Production Technology, Key Lab. of Green Process and Engineering and Inst. of Process Engineering
Publication Date:
Grant/Contract Number:
AC02-06CH11357; 91634111; 51774261; 51761135108
Type:
Accepted Manuscript
Journal Name:
ACS Applied Materials and Interfaces
Additional Journal Information:
Journal Volume: 10; Journal Issue: 19; Journal ID: ISSN 1944-8244
Publisher:
American Chemical Society (ACS)
Research Org:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org:
USDOE Office of Energy Efficiency and Renewable Energy (EERE), Vehicle Technologies Office (EE-3V); National Natural Science Foundation of China (NNSFC)
Country of Publication:
United States
Language:
English
Subject:
25 ENERGY STORAGE; 42 ENGINEERING; 37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; carbon nanofiber; high-rate lithium−sulfur batteries; lithium sulfide; lithium sulfide batteries; titanium oxide
OSTI Identifier:
1461271