Azobenzene-Phenazine-Based D–A Polymer as a Highly Efficient Bipolar Cathode for Sodium-Ion Batteries

Zhang, Jingwei; Chen, Jingfu; Wu, Fei; Huang, Guimei; Liu, Xiaorui; He, Rongxing; Zhu, Linna

doi:10.1021/acssuschemeng.3c06543

Cited by 1 publication

(1 citation statement)

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“…However, small-molecule organic electrodes cannot fulfill the conception of “single-molecule-energy-storage” since they are highly soluble. Instead, increasing the molecular weight can be an effective way to solve the dissolution problem. − Following this molecule design principle, several insoluble organic polymers with large molecular weights were synthesized and reported. − Nevertheless, only a few polymer electrodes have been reported to show the confirmed structures and polymerization degrees, such as poly(9,10-phenanthraquinone- alt -benzene) (PPQ, C T = 190 mAh g –1 ) and poly[anthraquinone- alt -dihydrophenazine] (PAQDPZ, C T = 276 mAh g –1 ). , Consequently, it is currently difficult to confirm the degrees of polymerization for most polymer electrodes.…”

Section: Introductionmentioning

confidence: 99%

A Macromolecule Cathode for High-Performance Li-Ion and Na-Ion Batteries

Hu,

Tang,

et al. 2024

ACS Sustainable Chem. Eng.

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Organic macromolecules have a molecular weight (M w ) between small molecules (M w < 1000 g mol −1 ) and polymers (M w > 5000 g mol −1 ). In this work, we design a novel organic macromolecule, namely, 1,1′-(1,4-phenylene)-bis[N,N′-bis(2-anthraquinone)]-bis[perylene-3,4,9,10-tetracarboxydiimide] (2PTCDI-4AQ). 2PTCDI-4AQ has a definite molecule structure and a large M w value of 1679.59 g mol −1 , thus showing good insolubility against most organic liquids. Meanwhile, 2PTCDI-4AQ can deliver a 12-electron redox mechanism and a theoretical specific capacity (C T ) of 189 mAh g −1 . Consequently, 2PTCDI-4AQ exhibits high cathode performances in Li-ion and Na-ion half/full cells. For instance, 2PTCDI-4AQ can show the discharge capacities of 174−188 mAh g −1 with a highly stable cycling retention of 93−97% during 100 cycles. Meanwhile, 2PTCDI-4AQ can also exhibit good rate performances of 130−148 mAh g −1 at the large current of 5 A g −1 . As far as we know, this is the first example of macromolecule organic electrodes reported in Li-ion and Na-ion batteries.

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