Highly Flexible, Freestanding Supercapacitor Electrode with Enhanced Performance Obtained by Hybridizing Polypyrrole Chains with MXene

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalNot applicablepeer-review

178 Scopus Citations
View graph of relations

Author(s)

  • Yang Huang
  • Qihuang Deng
  • Jie Zhou
  • Yan Huang
  • Qing Huang
  • Chunyi Zhi

Related Research Unit(s)

Detail(s)

Original languageEnglish
Article number1600969
Journal / PublicationAdvanced Energy Materials
Volume6
Issue number21
Publication statusPublished - 9 Nov 2016

Abstract

Though polypyrrole (PPy) is widely used in flexible supercapacitors owing to its high electrochemical activity and intrinsic flexibility, limited capacitance and cycling stability of freestanding PPy films greatly reduce their practicality in real-world applications. Herein, we report a new approach to enhance PPy's capacitance and cycling stability by forming a freestanding and conductive hybrid film through intercalating PPy into layered Ti3C2 (l-Ti3C2, a MXene material). The capacitance increases from 150 (300) to 203 mF cm−2 (406 F cm−3). Moreover, almost 100% capacitance retention is achieved, even after 20 000 charging/discharging cycles. The analyses reveal that l-Ti3C2 effectively prevents dense PPy stacking, benefiting the electrolyte infiltration. Furthermore, strong bonds, formed between the PPy backbones and surfaces of l-Ti3C2, not only ensure good conductivity and provide precise pathways for charge-carrier transport but also improve the structural stability of PPy backbones. The freestanding PPy/l-Ti3C2 film is further used to fabricate an ultra-thin all-solid-state supercapacitor, which shows an excellent capacitance (35 mF cm−2), stable performance at any bending state and during 10 000 charging/discharging cycles. This novel strategy provides a new way to design conductive polymer-based freestanding flexible electrodes with greatly improved electrochemical performances.

Research Area(s)

  • freestanding polymer film, high capacitance supercapacitors, MXene, polypyrrole, ultra-stable cycling ability

Citation Format(s)

Highly Flexible, Freestanding Supercapacitor Electrode with Enhanced Performance Obtained by Hybridizing Polypyrrole Chains with MXene. / Zhu, Minshen; Huang, Yang; Deng, Qihuang; Zhou, Jie; Pei, Zengxia; Xue, Qi; Huang, Yan; Wang, Zifeng; Li, Hongfei; Huang, Qing; Zhi, Chunyi.

In: Advanced Energy Materials, Vol. 6, No. 21, 1600969, 09.11.2016.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalNot applicablepeer-review