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Issue 5, 2017
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Oligoanilines as a suppressor of polysulfide shuttling in lithium–sulfur batteries

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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

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Publication details

The article was received on 05 Jul 2017, accepted on 25 Jul 2017 and first published on 25 Jul 2017


Article type: Communication
DOI: 10.1039/C7MH00510E
Citation: Mater. Horiz., 2017,4, 908-914
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    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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