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Title: Oligoanilines as a suppressor of polysulfide shuttling in lithium–sulfur batteries

The migration of small polysulfide (LiPS) chains through the porous polymeric separators seriously jeopardizes the cycle life and energy density of lithium–sulfur (Li–S) batteries. Herein, we present a new concept in which an organic oligoaniline, amine-capped aniline trimer (ACAT), serves as an effective suppressor of the LiPS migration in Li–S cells. The strong interaction between LiPS and ACAT facilitates the formation of bulky ACAT–LiPS complexes (organoLiPS complexes), which are then size-selectively sieved by the porous polymeric separators employed in Li–S cells. Thus, the addition of ACAT significantly ameliorates the electrochemical performances of Li–S batteries due to suppressed LiPS migration. This new concept offers a viable strategy to achieve practically viable Li–S batteries.
Authors:
 [1] ;  [1] ;  [1] ; ORCiD logo [1]
  1. Univ. of Texas, Austin, TX (United States). Materials Science and Engineering Program & Texas Materials Institute
Publication Date:
Grant/Contract Number:
EE0007218
Type:
Accepted Manuscript
Journal Name:
Materials Horizons
Additional Journal Information:
Journal Volume: 4; Journal Issue: 5; Journal ID: ISSN 2051-6347
Publisher:
Royal Society of Chemistry
Research Org:
Univ. of Texas, Austin, TX (United States)
Sponsoring Org:
USDOE Office of Energy Efficiency and Renewable Energy (EERE)
Country of Publication:
United States
Language:
English
Subject:
25 ENERGY STORAGE; 36 MATERIALS SCIENCE
OSTI Identifier:
1430185