Lithium-sulfur batteries are regarded as one of the most promising high-capacity storage systems due to their high theoretical specific capacity and energy density, as well as the advantages of sulfur's low cost and environmental friendliness. However, the shuttle effect of polysulfide in lithium-sulfur batteries usually leads to a series of problems such as loss of sulfur active materials, rapid capacity decline, and poor cycle life, which seriously hinders the commercial application of Li-S batteries. How to efficiently limit the shuttle effect of polysulfide to greatly improve the stability of Li-S battery and the utilization rate of active material sulfur has become one of the current research hotspots.
Researcher Wang Ruihu from the State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matters, Chinese Academy of Sciences, combined with the previous research progress on heterogeneous catalysis of porous organic polymers and the characteristics and current status of limiting the shuttle effect of polysulfides, was invited to "Advanced "Functional Materials" (Adv. Funct. Mater. 2018, 28, 1707597) published a review paper entitled Porous Organic Polymers for Polysulfide Trapping in Lithium-Sulfur Batteries. The first author of the paper is PhD student Cheng Zhibin.
The review article first outlines the research status of lithium-sulfur battery cathode materials, as well as the current problems and some main solutions, focusing on covalent organic frameworks, covalent triazine frameworks, porous organic frameworks, hypercrosslinked porous polymerization The characteristics of porous organic polymers such as organic compounds and imidazole-based ionic polymers and their characteristics and advantages in limiting polysulfide shuttle. By summarizing the important achievements made by the current porous organic polymer in restricting the transfer of polysulfide shuttle, the method of improving the performance of lithium-sulfur battery through the design and synthesis of porous organic polymer is described, and the porous organic polymer in lithium-sulfur battery The application prospects are prospected. This review is of great significance to the development of high-performance lithium-sulfur battery cathode materials.
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