Submicron graphite platelet‑incorporated PVDF composite: an efficient body motion‑based energy harvester for flexible electronics
(주)코리아스칼라
- 최초 등록일
- 2023.12.18
- 최종 저작일
- 2023.05
- 10페이지/ 어도비 PDF
- 가격 4,000원
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서지정보
ㆍ발행기관 : 한국탄소학회
ㆍ수록지정보 : Carbon letters / 33권 / 3호
ㆍ저자명 : Epsita Kar, Navonil Bose, Sukhen Das
목차
Submicron graphite platelet-incorporated PVDF composite: an efficient body motion-based energy harvester for flexible electronics
Abstract
1 Introduction
2 Results and discussion
3 Conclusion
Anchor 6
Acknowledgements
References
영어 초록
The fast expanding field of wearable technology requires light-weight, low-cost, scalable, flexible and efficient energy harvesters as a source of uninterrupted green power. This work reports fabrication of sub-micron graphite platelet/PVDF composite film-based flexible piezoelectric energy harvester (PGEH) for scavenging the wasted mechanical energy associated with human body motion. The addition of graphite platelet leads to the enhancement of electroactive β phase in PVDF; consequently, the piezoelectric and dielectric properties of the composite are enhanced. 0.5 wt% filler-loaded composite has 96% β phase fraction and dielectric constant 32 at 100 Hz (tanδ = 0.18).The PGEH produces open circuit voltage of 40 V and instantaneous power density of 3.35 mW cm− 3 with energy conversion efficiency of 22.5% under periodic finger tapping. It can generate fair electrical output under gentle heel (0.8 V) and toe movements (1.2 V). A PGEH is directly employed for powering 50 commercial LEDs and quick charging of a 2.2-μF capacitor upto 19.2 V. The device is also employed as self-powered dynamic pressure sensor which shows high sensitivity (0.9 VkPa− 1) with fast response time (1 ms). Therefore, this durable, flexible, efficient PGEH can have promising applications in wearable electronics as a green power source cum self-powered mechanosensor.
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