Issue 5, 2017

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

Abstract

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.

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

Supplementary files

Article information

Article type
Communication
Submitted
05 Jul 2017
Accepted
25 Jul 2017
First published
25 Jul 2017

Mater. Horiz., 2017,4, 908-914

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

C. Chang, S. Chung, P. Han and A. Manthiram, Mater. Horiz., 2017, 4, 908 DOI: 10.1039/C7MH00510E

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