Abstract
For a type-1 piezoelectric energy harvester (PEH), in which stress develops in the supporting system of the piezoelectric materials, the electromechanical coupling factor (kij) of the piezoelectric materials is important for the output power at the resonance frequency. Therefore, soft-piezoelectric materials are good candidates for these PEHs. For type-2 PEHs, in which stress develops in the piezoelectric material and supporting system, the figure of merit (FOM) of the output power at the resonance frequency is (kij 2 × Qm)/s11 E, where Qm and s11 E are the mechanical quality factor and the elastic compliance of piezoelectric materials, respectively. In particular, the effect of Qm is very large for these PEHs, indicating that hard-piezoelectric materials are good candidates for type-2 PEHs operating at the resonance frequency. For both type-1 and type-2 PEHs operating at off-resonance frequency, the kij 2 × dij × gij is the FOM of the output power of the PEHs, where gij is a piezoelectric voltage constant. Therefore, soft-piezoelectric materials are also good candidates for both type-1 and type-2 PEHs operating at the off-resonance frequency.
| Original language | English |
|---|---|
| Pages (from-to) | 581-591 |
| Number of pages | 11 |
| Journal | Nano Energy |
| Volume | 57 |
| DOIs | |
| Publication status | Published - 2019 Mar 1 |
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Keywords
- FOM
- k
- PEH
- Piezoelectric materials
- Q
ASJC Scopus subject areas
- Renewable Energy, Sustainability and the Environment
- Materials Science(all)
- Electrical and Electronic Engineering
Cite this
Determination of the appropriate piezoelectric materials for various types of piezoelectric energy harvesters with high output power. / Kim, Sun Woo; Lee, Tae Gon; Kim, Dae Hyeon; Lee, Ku Tak; Jung, Inki; Kang, Chong-Yun; Han, Seung Ho; Kang, Hyung Won; Nahm, Sahn.
In: Nano Energy, Vol. 57, 01.03.2019, p. 581-591.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Determination of the appropriate piezoelectric materials for various types of piezoelectric energy harvesters with high output power
AU - Kim, Sun Woo
AU - Lee, Tae Gon
AU - Kim, Dae Hyeon
AU - Lee, Ku Tak
AU - Jung, Inki
AU - Kang, Chong-Yun
AU - Han, Seung Ho
AU - Kang, Hyung Won
AU - Nahm, Sahn
PY - 2019/3/1
Y1 - 2019/3/1
N2 - For a type-1 piezoelectric energy harvester (PEH), in which stress develops in the supporting system of the piezoelectric materials, the electromechanical coupling factor (kij) of the piezoelectric materials is important for the output power at the resonance frequency. Therefore, soft-piezoelectric materials are good candidates for these PEHs. For type-2 PEHs, in which stress develops in the piezoelectric material and supporting system, the figure of merit (FOM) of the output power at the resonance frequency is (kij 2 × Qm)/s11 E, where Qm and s11 E are the mechanical quality factor and the elastic compliance of piezoelectric materials, respectively. In particular, the effect of Qm is very large for these PEHs, indicating that hard-piezoelectric materials are good candidates for type-2 PEHs operating at the resonance frequency. For both type-1 and type-2 PEHs operating at off-resonance frequency, the kij 2 × dij × gij is the FOM of the output power of the PEHs, where gij is a piezoelectric voltage constant. Therefore, soft-piezoelectric materials are also good candidates for both type-1 and type-2 PEHs operating at the off-resonance frequency.
AB - For a type-1 piezoelectric energy harvester (PEH), in which stress develops in the supporting system of the piezoelectric materials, the electromechanical coupling factor (kij) of the piezoelectric materials is important for the output power at the resonance frequency. Therefore, soft-piezoelectric materials are good candidates for these PEHs. For type-2 PEHs, in which stress develops in the piezoelectric material and supporting system, the figure of merit (FOM) of the output power at the resonance frequency is (kij 2 × Qm)/s11 E, where Qm and s11 E are the mechanical quality factor and the elastic compliance of piezoelectric materials, respectively. In particular, the effect of Qm is very large for these PEHs, indicating that hard-piezoelectric materials are good candidates for type-2 PEHs operating at the resonance frequency. For both type-1 and type-2 PEHs operating at off-resonance frequency, the kij 2 × dij × gij is the FOM of the output power of the PEHs, where gij is a piezoelectric voltage constant. Therefore, soft-piezoelectric materials are also good candidates for both type-1 and type-2 PEHs operating at the off-resonance frequency.
KW - FOM
KW - k
KW - PEH
KW - Piezoelectric materials
KW - Q
UR - http://www.scopus.com/inward/record.url?scp=85059540287&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85059540287&partnerID=8YFLogxK
U2 - 10.1016/j.nanoen.2018.12.082
DO - 10.1016/j.nanoen.2018.12.082
M3 - Article
VL - 57
SP - 581
EP - 591
JO - Nano Energy
JF - Nano Energy
SN - 2211-2855
ER -