文章信息/Info

Title:

Application of Covalent Organic Frameworks in Lithium-Sulfur Batteries

文章編號:

1674-3962(2021)09-0659-10

作者:

路丙毅1; 2; 賈超2; 江國防1; 趙新2

（1. 湖南大學化學化工學院，湖南 長沙 410082）（2. 中國科學院上海有機化學研究所 中國科學院有機功能分子合成與組裝重點實驗室，上海 200032）

Author(s):

LU Bingyi1; 2;  JIA Chao2;  JIANG Guofang1;  ZHAO Xin2

(1.College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, China) (2.CAS Key Laboratory of Synthetic and Self-Assembly Chemistry for Organic Functional Molecules, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, Shanghai 200032, China)

關鍵詞:

共價有機框架; 鋰硫電池; 正極; 隔膜; 負極

Keywords:

covalent organic frameworks;  lithium-sulfur batteries;  cathode;  separator;  anode

分類號:

O627;TM912

DOI:

10.7502/j.issn.1674-3962.202106027

文獻標志碼:

A

摘要:

共價有機框架（covalent organic frameworks，COFs）是一種由輕質元素組成的晶態有機多孔聚合物，具有低密度、大比表面積、高孔隙率、良好的物理和化學穩定性、規整的納米孔道以及強的結構可設計性等優點，在很多領域如氣體的吸附與分離、催化、傳感、光電等方面展現出很大的應用潛力。近年來COFs在能源轉化與儲存領域也受到較多關注，鋰硫（Li-S）電池因其低成本和高理論能量密度等優勢，在儲能系統方面具有廣闊的應用前景。然而這一新型二次電池仍存在一些亟需解決的問題，如多硫化物的穿梭效應、鋰枝晶的生長等，這些問題造成鋰硫電池庫侖效率低、循環穩定性差等不足，阻礙了其實際應用。近年來，基于COFs的結構特點，研究者們設計合成了多種多樣的COFs應用于鋰硫電池，COFs材料的使用有效提高了鋰硫電池的性能。主要綜述了COFs在鋰硫電池的正極、隔膜以及負極材料中的應用研究進展，并對其未來的發展進行了展望。

Abstract:

Covalent organic frameworks (COFs) are a class of crystalline porous organic polymers composed of light elements. They have advantages of low density, large specific surface area, high porosity, good physical and chemical stability, well-ordered nanochannels, and strong structural designability, which endow them with versatile applications in many fields such as gas adsorption and separation, catalysis, sensing, optoelectronics, etc.In recent years, COFs have drawn considerable attention of researchers in the field of energy conversion and storage. Lithium-sulfur (Li-S) batteries have great application potentials in energy storage systems due to their low cost and high theoretical energy density. However, this emerging type of rechargeable batteries still face some problems such as the shuttle effect of polysulfides and the growth of lithium dendrites which result in low coulombic efficiency and poor cycle stability of Li-S batteries and thus impede their practical application. Thanks to structural advantages of COFs, recent researchers have designed and synthesized a variety of COFs to be used in Li-S batteries, which have effectively improved the performance of Li-S batteries. This review article mainly focuses on the progress of COFs as functional materials for Li-S batteries cathodes, separators and anodes. Prospects for their development in this area have also been discussed.