Electrochemical Energy Reviews ( IF 28.4 ) Pub Date : 2022-09-22 , DOI: 10.1007/s41918-022-00135-9
Xiudong Chen , Xiaojie Yin , Junaid Aslam , Weiwei Sun , Yong Wang
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The most commonly used electrode materials in lithium organic batteries (LOBs) are redox-active organic materials, which have the advantages of low cost, environmental safety, and adjustable structures. Although the use of organic materials as electrodes in LOBs has been reported, these materials have not attained the same recognition as inorganic electrode materials, mainly due to their slight electronic conductivity and possible solubility in organic electrolytes, resulting in a low reversible capacity. However, over the past 10 years, organic materials have achieved outstanding results when used as battery electrodes, and an increasing number of researchers have realized their significance. This review summarizes the recent progress in organic electrodes for use in rechargeable LOBs. By classifying Li-storage mechanisms with various functional organic groups and designing molecules for next-generation advanced lithium organic systems, we attempt to analyze the working principle and the effect of various organic functionalities on electrochemical performance, to reveal the advantages and disadvantages of various organic molecules and to propose possible design principles and development trends for future LOBs. In addition, we highlight the recently reported two-dimensional covalent organic framework that is unique in its extensive π conjugated structure and Li-storage mechanisms based on benzene and N-containing rings; this framework is considered to be the most promising alternative to metal-based electrode materials with comparable large reversible capacities and long cycle lives.
Graphical abstract
中文翻译:
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可充电锂有机电池的最新进展和设计原则
锂有机电池(LOB)中最常用的电极材料是氧化还原活性有机材料,具有成本低、环境安全、结构可调等优点。尽管已经报道了在 LOB 中使用有机材料作为电极,但这些材料并未获得与无机电极材料相同的认可,这主要是由于它们具有轻微的电子导电性和可能在有机电解质中的溶解度,导致可逆容量低。然而,在过去的 10 年里,有机材料在用作电池电极时取得了突出的成果,越来越多的研究人员意识到了它们的重要性。本综述总结了用于可充电 LOB 的有机电极的最新进展。通过对不同功能有机基团的储锂机理进行分类,并为下一代先进的锂有机体系设计分子,我们试图分析各种有机官能团的工作原理和对电化学性能的影响,揭示各种有机基团的优缺点。分子,并为未来的 LOB 提出可能的设计原则和发展趋势。此外,我们重点介绍了最近报道的二维共价有机框架,其独特的广泛 π 共轭结构和基于苯和含 N 环的锂存储机制;该框架被认为是金属基电极材料最有希望的替代品,具有相当大的可逆容量和长循环寿命。