Conjugated porous polyimide poly(2,6-diaminoanthraquinone) benzamide with good stability and high-performance as a cathode for sodium ion batteries

verfasst von

Yanrui Pang, Hao Li, Shuanggui Zhang, Quanwei Ma, Xiong Peng, Rui Wang, Yunming Zhai, Hongbao Li, Hongwei Kang, Yuping Liu, Lin Zhang, Longhai Zhang, Tengfei Zhou, Chaofeng Zhang

Abstract

Organic electrode materials with environmentally friendly, design flexibility at the molecular level are promising substitutes for inorganic intercalation materials as cathode for SIBs. However, traditional electrode materials usually perform poor cycling stability and rate performance, mainly due to the dissolution in electrolytes and low electronic conductivity. Herein, conjugated porous polyimide poly(2,6-diaminoanthraquinone) benzamide (CP-PDAB), was prepared from 2,6-diaminoanthraquinone and pyromellitic dianhydride by a simple polycondensation reaction. The obtained CP-PDAB has disordered aggregates with porous and loose structure, facilitating the penetration of electrolyte and volume change during charging/discharging. And the constructed conjugated skeleton with electron delocalization is beneficial for structural stability, insolubility in electrolyte and high electronic conductivity. When evaluated as cathode for sodium ion batteries, it can retain a high reversible discharge capacity of 141 mAh g-1 at 500 mA g-1 for 100 cycles, and can maintain the high specific capacity of 71 mAh g-1 at 10 A g-1 after 500 cycles. This work demonstrates the potential application of organic materials containing conjugated skeleton, porous and loose structure, and multiple redox active units for next generation electrochemical energy storage devices.

Organisationseinheit(en)

Institut für Festkörperphysik
Laboratorium für Nano- und Quantenengineering

Externe Organisation(en)

Anhui University
Fuyang Normal University

Typ

Artikel

Journal

Journal of Materials Chemistry A

Band

10

Seiten

1514–1521

Anzahl der Seiten

8

ISSN

2050-7488

Publikationsdatum

21.01.2022

Publikationsstatus

Veröffentlicht

Peer-reviewed

Ja

ASJC Scopus Sachgebiete

Chemie (insg.), Erneuerbare Energien, Nachhaltigkeit und Umwelt, Werkstoffwissenschaften (insg.)

Ziele für nachhaltige Entwicklung

SDG 7 – Erschwingliche und saubere Energie

Elektronische Version(en)

https://doi.org/10.1039/d1ta06384g (Zugang: Geschlossen)