Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/43789
Title: A rectification-free piezo-supercapacitor with a polyvinylidene fluoride separator and functionalized carbon cloth electrodes
Authors: Song, R
Jin, H
Li, X
Fei, L
Zhao, Y
Huang, H 
Chan, HLW 
Wang, Y 
Chai, Y 
Issue Date: 2015
Publisher: Royal Society of Chemistry
Source: Journal of materials chemistry A, 2015, v. 3, no. 29, p. 14963-14970 How to cite?
Journal: Journal of materials chemistry A 
Abstract: The integration of energy harvesting and energy storage in this device not only enables the conversion of ambient energy into electricity, but also provides a sustainable power source for various electronic devices and systems. It is highly desirable to improve the integration level and minimize unnecessary energy loss in the power-management circuits between energy harvesting and storage devices. In our work, we integrate a PVDF film into a supercapacitor as both the separator and the energy harvester. The double-sides of the polarized PVDF films are coated with H2SO4/poly(vinyl alcohol) (PVA) gel electrolyte. Functionalized carbon cloths are assembled with H2SO4/PVA electrolyte as both anode and cathode, forming a flexible all-solid-state supercapacitor. Externally mechanical impacts establish a piezoelectric potential across the PVDF films, and drive ions in the electrolyte to migrate towards the interface of the supercapacitor electrode, storing the electricity in the form of electrochemical energy. The asymmetric output characteristic of the piezoelectric PVDF film under mechanical impact results in the effective charging of the supercapacitor without any rectification device. The integrated piezo-supercapacitor exhibits a specific capacitance of 357.6 F m-2, a power density of 49.67 mW h m-2, and an energy density of 400 mW m-2. Our hybridized energy harvesting and storage device can be further extended for providing sustainable power source of various types of sensors.
URI: http://hdl.handle.net/10397/43789
ISSN: 2050-7488
EISSN: 2050-7496
DOI: 10.1039/c5ta03349g
Appears in Collections:Journal/Magazine Article

Access
View full-text via PolyU eLinks SFX Query
Show full item record

SCOPUSTM   
Citations

14
Last Week
1
Last month
Citations as of Feb 20, 2018

WEB OF SCIENCETM
Citations

15
Last Week
2
Last month
Citations as of Feb 15, 2018

Page view(s)

66
Last Week
0
Last month
Citations as of Feb 19, 2018

Google ScholarTM

Check

Altmetric


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.