NDLI: A rectification-free piezo-supercapacitor with a polyvinylidene fluoride separator and functionalized carbon cloth electrodes

Content Provider	Royal Society of Chemistry (RSC)
Author	Jin, Huanyu Fei, Linfeng Li, Xing Wang, Yu Chan, Helen Lai-Wa Huang, Haitao Chai, Yang Song, Ruobing Zhao, Yuda
Copyright Year	2015
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.
Starting Page	14963
Ending Page	14970
Page Count	8
File Format	HTM / HTML PDF
ISSN	20507488
Volume Number	3
Issue Number	29
Journal	Journal of Materials Chemistry A
DOI	10.1039/c5ta03349g
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Open
Subject Keyword	Polyvinylidene fluoride Supercapacitor Vinyl alcohol Electrolyte Carbon Anode Cathode Piezoelectricity Electrode Electrochemistry Capacitor Energy density
Content Type	Text
Resource Type	Article
Subject	Chemistry Renewable Energy, Sustainability and the Environment Materials Science

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1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
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3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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