High-performance Zn-ion hybrid supercapacitor enabled by a lightweight polyimide-based anode

作者：Ji, Faqi; Gou, Siying; Tang, Jiahao; Xu, Yuanhu; Eldin, Sayed M.; Mai, Wenjie; Li, Jinliang^*; Liu, Bo-Tian^*

来源：Chemical Engineering Journal, 2023, 474: 145786.

DOI：10.1016/j.cej.2023.145786

• Pseudocapacitor-type anode
• Zinc -ion hybrid supercapacitor
• Polyimide
• High energy density

Aqueous zinc-ion hybrid supercapacitors (HSCs) have garnered significant attention in energy storage systems due to their unique combination of supercapacitors and battery benefits. However, conventional zinc-ion HSCs utilize Zn metal as anodes, leading to dendrite issues and the limited application of zinc-ion HSCs due to heavy zinc foils. In our work, we constructed lightweight zinc-ion HSCs using a polyimide directly grown on a multiwalled carbon nanotube (PNDIE/MWCNT) as a pseudocapacitor-type anode paired with a polythiophenecoated Na0.55MnO2 carbon cloth-based battery-type cathode (PEDOT-Na0.55MnO2/CC). Benefiting from its lightweight and working mechanism properties, the zinc-ion HSC exhibits a practical energy density of 10.7 Wh kg-1 and a high power density of 192.2 W kg-1, surpassing most previously reported zinc-ion devices. Additionally, the zinc-ion HSC displays excellent retention of 82.1% over 2000 cycles at a scan rate of 15 mV s-1. We believe that our work paves the way for the development of next-generation zinc-ion HSCs by utilizing advanced lightweight metal-free anodes to replace the zinc foil anode.

• 单位
  桂林理工大学