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Strategies for Polysulfide Immobilization in Sulfur Cathodes for Room‐Temperature Sodium–Sulfur Batteries
Author(s) -
Zhou Jiahui,
Xu Shengming,
Yang Yue
Publication year - 2021
Publication title -
small
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.785
H-Index - 236
eISSN - 1613-6829
pISSN - 1613-6810
DOI - 10.1002/smll.202100057
Subject(s) - polysulfide , sulfur , energy storage , materials science , redox , electrocatalyst , cathode , sodium , energy density , nanotechnology , electrode , chemistry , inorganic chemistry , electrochemistry , engineering physics , metallurgy , engineering , electrolyte , power (physics) , physics , quantum mechanics
Room‐temperature sodium–sulfur batteries are one of the most attractive energy storage systems due to their low cost and ultrahigh energy density (2600 W h kg −1 ). During the charge/discharge process, the sulfur can react with sodium via a multistep redox reaction to obtain a high specific capacity (1675 mA h g −1 ). However, these batteries face the difficult challenge of the “shuttle effect,” which hinders their practical application. Many strategies have been employed to address this issue on sulfur electrodes, such as intact physical confinement, chemical inhibition, and electrocatalysis. In this review, the mechanisms of the abovementioned strategies are summarized, the remaining issues are clarified, and research directions are proposed for developing advanced sodium–sulfur batteries.