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.

中文翻译：

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寡苯胺作为锂硫电池中多硫化物穿梭的抑制剂

小多硫化物（LiPS）链通过多孔聚合物隔板的迁移严重危害了锂硫（Li-S）电池的循环寿命和能量密度。在这里，我们提出了一个新的概念，其中有机低聚苯胺，胺基苯胺三聚体（ACAT）可作为Li-S细胞中LiPS迁移的有效抑制剂。LiPS和ACAT之间的强相互作用促进了庞大的ACAT-LiPS复合物（organoLiPS复合物）的形成，然后通过Li-S电池中使用的多孔聚合物隔板对分子筛进行大小选择。因此，由于抑制了LiPS迁移，ACAT的添加显着改善了Li-S电池的电化学性能。这个新概念提供了可行的策略，以实现实用的Li-S电池。