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A flexible and capsular polypyrrole nanotubular film-based pseudo-capacitive electrode with enhanced capacitive properties enabled by Au nanoparticle doping

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Abstract

Conducting polymer (CP)-based pseudocapacitive electrodes with good capacitance/rate capabilities and high potential window retention (namely, a neglectable IR drop) under high current density are of great interest due to their practical applications in fabricating instantaneous and high-power energy devices. However, they remain a challenge to realize. Herein, we report an alternative route for enhancing the capacitive properties of polypyrrole nanofibrous membrane (PPy NM)-based electrodes without adding any capacitive materials. The new strategy involves doping with Au nanoparticles via electrospinning followed by in situ polymerization. Compared with a pristine PPy NM, the specific capacitance of the Au/PPy NM was enhanced from 193.7 to 455.3 F g−1 at a scan rate of 5 mV s−1. Additionally, the rate capabilities were enhanced over broad ranges of current density (0.5–30 A g−1) and scan rate (5–1000 mV s−1). Interestingly, the potential window retention was greatly enhanced from 74.5% (PPy NM) to 95.6% (Au/PPy NM) over a wide range of current densities (0.5–30 A g−1). The Au/PPy NM also exhibited good cycling stability (>85% over 10 000 charge–discharge cycles under a current density of 30 A g−1).

Graphical abstract: A flexible and capsular polypyrrole nanotubular film-based pseudo-capacitive electrode with enhanced capacitive properties enabled by Au nanoparticle doping

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Supplementary files

Article information


Submitted
02 Dec 2019
Accepted
04 Feb 2020
First published
06 Feb 2020

J. Mater. Chem. C, 2020, Advance Article
Article type
Paper

A flexible and capsular polypyrrole nanotubular film-based pseudo-capacitive electrode with enhanced capacitive properties enabled by Au nanoparticle doping

Z. Li, Z. Lei, Y. Wang, Y. Wu, M. Guo, Y. He, J. Chen and J. Wang, J. Mater. Chem. C, 2020, Advance Article , DOI: 10.1039/C9TC06574A

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