Wang Zhuo, Zhang Pengchao, Li Junpeng, Zhang Chong, Jiang Jia-Xing, Lv Menglan, Ding Zhengping, Zhang Bin
School of Chemistry and Chemical Engineering, Guizhou University, Guiyang, China.
Key Laboratory for Macromolecular Science of Shaanxi Province, Shaanxi Engineering Laboratory for Advanced Energy Technology, School of Materials Science and Engineering, Shaanxi Normal University, Xi'an, China.
Front Chem. 2022 Nov 17;10:1056244. doi: 10.3389/fchem.2022.1056244. eCollection 2022.
Recently, the development of cathode materials is becoming an important issue for lithium-ion batteries (LIBs). Compared with inorganic cathodes, the organic cathodes are developing rapidly, ascribing to their distinct merits in light weight, low cost, massive organic resources and high capacity. In this paper, a cost-efficiency naphthaldiimide (NDI) based derivative, 2,7-bis(2-((2-hydroxyethyl) amino) ethyl) benzo[lmn] [3,8] phenanthroline-1,3,6,8(2H, 7H)-tetraone (NDI-NHOH), was used as organic cathode in LIBs. The NDI-NHOH was synthesized easily one-step process, and it showed very high thermal stability. Through mixing NDI-NHOH with acetylene black and polyvinylidene fluoride (weight ratio of 6:3:1) as composite cathode in lithium-metal based LIBs, the NDI-NHOH presented versatile electrochemical properties. From cyclic voltammetry (CV) test, it exhibited two reversible peaks for oxidation and reduction in the first cycle, respectively. Notably, the oxidation and reduction peaks were located at 2.54, 3.22 and 2.14, 2.32 V vs. Li/Li, respectively. By employing NDI-NHOH as cathode, it demonstrated a specific capacity of about 80 mAh g in the range of 1.5-3.5 V, where the batteries retained a capacity retention of 50% over 20 cycles. According to the LIBs study, it suggests that the NDI-NHOH-based derivative shows a potentially promising candidate as efficient organic cathode materials for high-performance metal-ions batteries.
近年来，阴极材料的发展已成为锂离子电池（LIBs）的一个重要问题。与无机阴极相比，有机阴极发展迅速，这归因于其在重量轻、成本低、有机资源丰富和容量高方面的显著优点。本文中，一种基于萘二酰亚胺（NDI）的具有成本效益的衍生物，即2,7-双（2-（（2-羟乙基）氨基）乙基）苯并[lmn][3,8]菲咯啉-1,3,6,8（2H，7H）-四酮（NDI-NHOH），被用作LIBs中的有机阴极。NDI-NHOH通过一步法易于合成，并且表现出非常高的热稳定性。通过将NDI-NHOH与乙炔黑和聚偏二氟乙烯（重量比为6:3:1）混合作为锂基金属LIBs中的复合阴极，NDI-NHOH呈现出多样的电化学性能。从循环伏安法（CV）测试来看，它在第一个循环中分别表现出两个氧化和还原的可逆峰。值得注意的是，氧化峰和还原峰分别位于相对于Li/Li为2.54、3.22V以及2.14、2.32V处。通过使用NDI-NHOH作为阴极，在1.5 - 3.5V范围内它表现出约80mAh g的比容量，在此范围内电池在20个循环后保持50%的容量保持率。根据对LIBs的研究，这表明基于NDI-NHOH的衍生物作为高性能金属离子电池的高效有机阴极材料显示出潜在的应用前景。
