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Title: High-Rate and Long-Term Cycle Stability of Li–S Batteries Enabled by Li2S/TiO2-Impregnated Hollow Carbon Nanofiber Cathodes

Journal Article · · ACS Applied Materials and Interfaces
 [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

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, Li2S, as the cathode material, coupled with electrospun TiO2-impregnated hollow carbon nanofibers (TiO2-HCFs), which serve as the conductive agent and protective barrier for Li2S in Li-S batteries. TiO2-HCFs provide much improved electron/ionic conductivity and serve as a physical barrier, which prevents the dissolution of lithium polysulfides. The Li2S/TiO2-HCF composite delivers a discharge capacity of 851 mA h gLi2S-1 at 0.1C and the bilayer TiO2-HCFs/Li2S/TiO2-HCF composite delivers a high specific capacity of 400 mA h gLi2S-1 at 5C.

Research Organization:
Argonne National Laboratory (ANL), Argonne, IL (United States)
Sponsoring Organization:
National Natural Science Foundation of China (NSFC); USDOE Office of Energy Efficiency and Renewable Energy (EERE), Vehicle Technologies Office (EE-3V)
Grant/Contract Number:
AC02-06CH11357
OSTI ID:
1461271
Journal Information:
ACS Applied Materials and Interfaces, Journal Name: ACS Applied Materials and Interfaces Journal Issue: 19 Vol. 10; ISSN 1944-8244
Publisher:
American Chemical Society (ACS)Copyright Statement
Country of Publication:
United States
Language:
English

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Cited By (7)

A Review: Electrospun Nanofiber Materials for Lithium‐Sulfur Batteries journal August 2019
The Crystallinity of Metal Oxide in Carbonized Metal Organic Frameworks and the Effect on Restricting Polysulfides journal December 2019
Housing Sulfur in Polymer Composite Frameworks for Li–S Batteries journal February 2019
“Pea-pod-like” nitrogen-doped hollow porous carbon cathode hosts decorated with polar titanium dioxide nanocrystals as efficient polysulfide reservoirs for advanced lithium–sulfur batteries journal January 2018
Surface chemistry of tube-in-tube nanostructured cuprous sulfide@void@carbon in catalytical polysulfide conversion journal January 2019
Recent advances in cathode materials for rechargeable lithium–sulfur batteries journal January 2019
Nitrogen Doped Carbon Nanosheets Encapsulated in situ Generated Sulfur Enable High Capacity and Superior Rate Cathode for Li-S Batteries journal September 2018