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A flexible and capsular polypyrrole nanotubular film-based pseudo-capacitive electrode with enhanced capacitive properties enabled by Au nanoparticle doping.
- Source :
- Journal of Materials Chemistry C; 3/21/2020, Vol. 8 Issue 11, p3807-3813, 7p
- Publication Year :
- 2020
-
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<superscript>−1</superscript> at a scan rate of 5 mV s<superscript>−1</superscript>. Additionally, the rate capabilities were enhanced over broad ranges of current density (0.5–30 A g<superscript>−1</superscript>) and scan rate (5–1000 mV s<superscript>−1</superscript>). 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<superscript>−1</superscript>). The Au/PPy NM also exhibited good cycling stability (>85% over 10 000 charge–discharge cycles under a current density of 30 A g<superscript>−1</superscript>). [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 20507526
- Volume :
- 8
- Issue :
- 11
- Database :
- Complementary Index
- Journal :
- Journal of Materials Chemistry C
- Publication Type :
- Academic Journal
- Accession number :
- 142337654
- Full Text :
- https://doi.org/10.1039/c9tc06574a