Highly porous electroactive polyimide-based nanofibrous composite anode for all-organic aqueous ammonium dual-ion batteries. (December 2020)

• Record Type: Journal Article
• Authors: Zhou, Gangyong; An, Xingyu; Zhou, Chunyang; Wu, Yue; Miao, Yue-E; Liu, Tianxi
• Is Part Of: Composites communications. Volume 22(2020)
• Publication Date: 2020-12
• Subjects: Electroactive polyimide -- Composite nanofiber -- Highly porous structure -- Aqueous ammonium dual-ion batteries
• DOI: 10.1016/j.coco.2020.100519
• Languages: English
• ISSNs: 2452-2139

Abstract

Abstract: Aqueous ammonium dual-ion batteries (ADIBs), especially those integrating organic electroactive materials and functioning in a mild electrolyte of ammonium sulfate solution, have attracted increasing attentions in the stationary electrochemical storage area due to their inherent safety, sustainability, and environmental friendliness features. Herein, a flexible electroactive polyimide/nitrogen-doped carbon/carbon nanotubes (PI/NDC/CNT) composite nanofiber membrane with highly interconnected conductive porous structure is prepared through electrospinning and in-situ pyrolysis/imidization treatments for ADIB applications. The electroactive PI achieves uniform distribution, high utilization and ultrafast reaction kinetics within PI/NDC/CNT electrode. As a result, the PI/NDC/CNT electrode exhibits high reversible capacity of 161 mA h g −1 at 0.5 A g −1, good rate capability, and satisfying capacity retention over 87.9% after 5000 cycles. Besides, an all-organic aqueous ADIB using PI/NDC/CNT and polyaniline/carbon nanofiber composites as anode and cathode respectively, achieves ultralong cycle stability and high energy density of 114.3 W h kg −1 . Graphical abstract: Image 1 Highlights: A highly porous electroactive polyimide-based composite nanofiber anode is facilely prepared. The in-situ formed interconnected conductive porous structure can facilitate NH4 + diffusion and electron transport. A green all-organic aqueous ammonium dual-ion battery is constructed to deliver high energy density and power density.