Chemical Immobilization Effect on Lithium Polysulfides for Lithium–Sulfur Batteries. Issue 4 (13th December 2017)

• Record Type: Journal Article
• Authors: Li, Caixia; Xi, Zhucong; Guo, Dexiang; Chen, Xiangju; Yin, Longwei
• Is Part Of: Small. Volume 14:Issue 4(2018)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2017-12-13
• Subjects: chemical affinity -- chemical immobilizing effects -- lithium polysulfides -- lithium–sulfur batteries -- polar interactions; Nanotechnology -- Periodicals; Nanoparticles -- Periodicals; Microtechnology -- Periodicals; 620.5
• DOI: 10.1002/smll.201701986
• Languages: English
• ISSNs: 1613-6810

Abstract

Abstract: Despite great progress in lithium–sulfur batteries (LSBs), great obstacles still exist to achieve high loading content of sulfur and avoid the loss of active materials due to the dissolution of the intermediate polysulfide products in the electrolyte. Relationships between the intrinsic properties of nanostructured hosts and electrochemical performance of LSBs, especially, the chemical interaction effects on immobilizing polysulfides for LSB cathodes, are discussed in this Review. Moreover, the principle of rational microstructure design for LSB cathode materials with strong chemical interaction adsorbent effects on polysulfides, such as metallic compounds, metal particles, organic polymers, and heteroatom‐doped carbon, is mainly described. According to the chemical immobilizing mechanism of polysulfide on LSB cathodes, three kinds of chemical immobilizing effects, including the strong chemical affinity between polar host and polar polysulfides, the chemical bonding effect between sulfur and the special function groups/atoms, and the catalytic effect on electrochemical reaction kinetics, are thoroughly reviewed. To improve the electrochemical performance and long cycling life‐cycle stability of LSBs, possible solutions and strategies with respect to the rational design of the microstructure of LSB cathodes are comprehensively analyzed. Abstract : The mechanism of chemical immobilization between host materials and sulfur species in lithium‐sulfur batteries (LSBs) is discussed systematically in this Review. The strong chemical immobilizing effect, polar interaction and catalytic effect during electrochemical process are summarized and discussed here. Furthermore, new ideas and solutions for realizing practical application of high‐performance LSBs in the future are proposed.