已经通过一种简便的原位化学氧化聚合方法制备了基于芳香族聚酰亚胺(PI)和电子导电性聚噻吩(PT)的有机复合电极材料。电活性PI和电子导电PT均具有共同的芳族结构,可以紧密接触,从而使导电聚合物复合材料具有高度可逆的氧化还原反应和良好的结构稳定性。已经证明,具有30 wt%PT涂层的PI复合材料(PI30PT)具有良好的电导率和快速的锂反应动力学的最佳组合。PI和PT之间的协同效应可实现216.8 mA hg -1的高可逆容量在C / 10的电流速率下具有高的循环稳定性,即在20C的高电流速率下具有89.6 mA hg -1的高容量,在1000次循环后的容量保持率为94%。PT涂层的高电子电导率与PI基体出色的氧化还原反应可逆性的精心组合提供了一种经济的方式来制备用于可持续能源存储应用的高性能锂离子电池。
N-Amino-1,8-naphthalimide was used as a protectinggroup and a reagent to selective synthesis of various mono-N-substituted hydrazines and hydrazides. In all these reactions, the protecting reagent N-amino-1,8-naphthalimide was easily regenerated in good yields by the hydrazinolysis. All these transformations showed good functional-group tolerance and can be used for large scale C−N cross-coupling
Polythiophene coated aromatic polyimide enabled ultrafast and sustainable lithium ion batteries
作者:Hailong Lyu、Jiurong Liu、Shannon Mahurin、Sheng Dai、Zhanhu Guo、Xiao-Guang Sun
DOI:10.1039/c7ta07893e
日期:——
electrode materials based on an aromatic polyimide (PI) and electron conductive polythiophene (PT) have been prepared by a facile in situ chemical oxidation polymerization method. The common aromatic structure possessed by both electroactive PI and electron conductive PT allows intimate contacts, resulting in conductive polymeric composites with highly reversibleredoxreactions and good structural stability
已经通过一种简便的原位化学氧化聚合方法制备了基于芳香族聚酰亚胺(PI)和电子导电性聚噻吩(PT)的有机复合电极材料。电活性PI和电子导电PT均具有共同的芳族结构,可以紧密接触,从而使导电聚合物复合材料具有高度可逆的氧化还原反应和良好的结构稳定性。已经证明,具有30 wt%PT涂层的PI复合材料(PI30PT)具有良好的电导率和快速的锂反应动力学的最佳组合。PI和PT之间的协同效应可实现216.8 mA hg -1的高可逆容量在C / 10的电流速率下具有高的循环稳定性,即在20C的高电流速率下具有89.6 mA hg -1的高容量,在1000次循环后的容量保持率为94%。PT涂层的高电子电导率与PI基体出色的氧化还原反应可逆性的精心组合提供了一种经济的方式来制备用于可持续能源存储应用的高性能锂离子电池。
Aromatic Polyimide/Graphene Composite Organic Cathodes for Fast and Sustainable Lithium-Ion Batteries
作者:Hailong Lyu、Peipei Li、Jiurong Liu、Shannon Mahurin、Jihua Chen、Dale K. Hensley、Gabriel M. Veith、Zhanhu Guo、Sheng Dai、Xiao-Guang Sun
DOI:10.1002/cssc.201702001
日期:2018.2.22
A compositeorganiccathode material based on aromaticpolyimide (PI) and highly conductive graphene was prepared through a facile in situ polymerization method for application in lithium‐ion batteries. The in situ polymerization generated intimate contact between PI and electronically conductive graphene, resulting in conductive composites with highly reversible redox reactions and good structure
通过一种简便的原位聚合方法,制备了一种基于芳香族聚酰亚胺(PI)和高导电性石墨烯的复合有机阴极材料,用于锂离子电池。原位聚合在PI和导电石墨烯之间产生紧密接触,从而导致导电复合材料具有高度可逆的氧化还原反应和良好的结构稳定性。PI和石墨烯之间的协同作用不仅在C / 10的充放电速率下实现了232.6 mAh g -1的高可逆容量,而且还具有极高的循环稳定性,即108.9 mAh g的高容量- 1个在50C的极高充放电速率下,经过1000次循环后容量保持率达80%。PI稳定的氧化还原可逆性与石墨烯添加剂的高电子电导率相结合,从而提高了电化学性能。在相同的充放电速率下,在比容量和长期循环稳定性方面,基于石墨烯的复合材料还表现出比基于多壁碳纳米管和导电炭黑C45的复合材料更好的性能。
Chromophores Arranged as “Magnetic Meta Atoms”: Building Blocks for Molecular Metamaterials
作者:Heinz Langhals、Alexander Hofer
DOI:10.1021/jo4005662
日期:2013.6.21
Benzoperylenetriscarboximides were parallel arranged by stiff spacers where exciton interactions could be controlled by their distance. The most bathochromic electronic transition of the chromophores essentially exhibits only an electric component where an orthogonal magnetic component was established by the distance-controlled interaction of chromophores. Such arrangements were discussed as building