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

Journal Article · · Materials Horizons
DOI: https://doi.org/10.1039/c7mh00510e · OSTI ID:1430185

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.

Research Organization:
Univ. of Texas, Austin, TX (United States)
Sponsoring Organization:
USDOE Office of Energy Efficiency and Renewable Energy (EERE)
Grant/Contract Number:
EE0007218
OSTI ID:
1430185
Alternate ID(s):
OSTI ID: 1429330; OSTI ID: 1487267
Journal Information:
Materials Horizons, Vol. 4, Issue 5; ISSN 2051-6347
Publisher:
Royal Society of ChemistryCopyright Statement
Country of Publication:
United States
Language:
English

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Cited By (5)

Progress on the Critical Parameters for Lithium-Sulfur Batteries to be Practically Viable journal May 2018
Current Status and Future Prospects of Metal–Sulfur Batteries journal May 2019
Polyaniline: an effective suppressor against diffusion and dissolution of polysulfides in Li-S battery journal July 2019
Toward Better Lithium–Sulfur Batteries: Functional Non-aqueous Liquid Electrolytes journal August 2018
Inhibition of polysulfide diffusion in lithium–sulfur batteries: mechanism and improvement strategies journal January 2019

Figures / Tables (5)