TY - JOUR
T1 - An ultra-low-frequency, broadband and multi-stable tri-hybrid energy harvester for enabling the next-generation sustainable power
AU - Wang, Chen
AU - Lai, Siu Kai
AU - Wang, Jia Mei
AU - Feng, Jing Jing
AU - Ni, Yi Qing
N1 - Funding Information:
The work described in this paper was supported by the National Natural Science Foundation of China (Grant Nos. 12002300, 12072233 and 11872044) and the Research Impact Fund (Project No. R5020-18) and Early Career Scheme (Project No. PolyU 252026/16E) from the Research Grants Council of the Hong Kong Special Administrative Region. The funding support from the Innovation and Technology Commission of the Hong Kong Special Administrative Region to the Hong Kong Branch of National Rail Transit Electrification and Automation Engineering Technology Research Center (K-BBY1) is also gratefully acknowledged. In addition, the authors would also like to express our sincere gratitude and appreciation to the support of the Center of Sports Training and Rehabilitation at Department of Rehabilitation Sciences, The Hong Kong Polytechnic University.
Funding Information:
The work described in this paper was supported by the National Natural Science Foundation of China (Grant Nos. 12002300, 12072233 and 11872044) and the Research Impact Fund (Project No. R5020-18) and Early Career Scheme (Project No. PolyU 252026/16E) from the Research Grants Council of the Hong Kong Special Administrative Region. The funding support from the Innovation and Technology Commission of the Hong Kong Special Administrative Region to the Hong Kong Branch of National Rail Transit Electrification and Automation Engineering Technology Research Center (K-BBY1) is also gratefully acknowledged. In addition, the authors would also like to express our sincere gratitude and appreciation to the support of the Center of Sports Training and Rehabilitation at Department of Rehabilitation Sciences, The Hong Kong Polytechnic University.
Publisher Copyright:
© 2021 Elsevier Ltd
PY - 2021/6/1
Y1 - 2021/6/1
N2 - This work presents a highly miniaturized, ultra-low-frequency, multi-stable and tri-hybrid portable energy harvester to harness structural and biomechanical vibration energy efficiently. This energy harvester is developed by using a novel multi-stability-based frequency up-converted approach, in which two new configurations of magneto-multi-stable oscillators are closely integrated. Hence, the displacement stroke of low-frequency vibration and the mechanical energy transfer process can almost completely overlap, and consequently magnify the power output and power density under low-frequency broadband vibration sources. By hybridizing two impact-driven piezoelectric generators, an array-type electromagnetic generator, a sliding-mode triboelectric nanogenerator and a contact-separation triboelectric nanogenerator in a highly compact design arrangement, more electric power can be generated from a single mechanical motion, which can successfully enhance the output performance. A fabricated prototype of the present design is tested using shaker excitations and body-induced motions. Under the shaker test, the prototype works well at a wide bandwidth of 1–11 Hz under 1 g (=9.8 m s−2) and generates a maximum output power of 85.9 mW across the optimum resistance loads, corresponding to the normalized power density of 3.70mW cm-3g-2 at 3 Hz under 1 g. During the human activity motions (i.e., walking, slow running, and handshaking), the prototype also shows good performance under different wearable positions of the human body and can power up 20 thermohygrometers and 296 commercial light-emitting diodes continuously. The present energy harvester is a promising application to enable as a sustainable power source for wearable/portable electronics and wireless monitoring systems.
AB - This work presents a highly miniaturized, ultra-low-frequency, multi-stable and tri-hybrid portable energy harvester to harness structural and biomechanical vibration energy efficiently. This energy harvester is developed by using a novel multi-stability-based frequency up-converted approach, in which two new configurations of magneto-multi-stable oscillators are closely integrated. Hence, the displacement stroke of low-frequency vibration and the mechanical energy transfer process can almost completely overlap, and consequently magnify the power output and power density under low-frequency broadband vibration sources. By hybridizing two impact-driven piezoelectric generators, an array-type electromagnetic generator, a sliding-mode triboelectric nanogenerator and a contact-separation triboelectric nanogenerator in a highly compact design arrangement, more electric power can be generated from a single mechanical motion, which can successfully enhance the output performance. A fabricated prototype of the present design is tested using shaker excitations and body-induced motions. Under the shaker test, the prototype works well at a wide bandwidth of 1–11 Hz under 1 g (=9.8 m s−2) and generates a maximum output power of 85.9 mW across the optimum resistance loads, corresponding to the normalized power density of 3.70mW cm-3g-2 at 3 Hz under 1 g. During the human activity motions (i.e., walking, slow running, and handshaking), the prototype also shows good performance under different wearable positions of the human body and can power up 20 thermohygrometers and 296 commercial light-emitting diodes continuously. The present energy harvester is a promising application to enable as a sustainable power source for wearable/portable electronics and wireless monitoring systems.
KW - Biomechanical energy
KW - Frequency up-conversion
KW - Structural vibration
KW - Tri-/quad-stable nonlinearity
KW - Tri-hybrid harvester
UR - http://www.scopus.com/inward/record.url?scp=85104935491&partnerID=8YFLogxK
U2 - 10.1016/j.apenergy.2021.116825
DO - 10.1016/j.apenergy.2021.116825
M3 - Journal article
AN - SCOPUS:85104935491
SN - 0306-2619
VL - 291
JO - Applied Energy
JF - Applied Energy
M1 - 116825
ER -