Details
| Original language | English |
|---|---|
| Article number | 225107 |
| Journal | Journal of applied physics |
| Volume | 129 |
| Issue number | 22 |
| Publication status | Published - 14 Jun 2021 |
Abstract
We utilize atomistic simulations that account for point charges and dipoles to demonstrate that flexoelectricity, which arises from strain gradients, can be exploited to generate electricity from crumpled graphene sheets. Indentation of a circular graphene sheet generates localized developable (d)-cones, for which we verify the core radius and azimuthal angle with established theoretical models. We determine the voltage that can be generated based on the resulting electrostatic fields and compare the voltage generation to previous theoretical predictions that are scaled down to the nanoscale. In doing so, we find that the voltage generated from crumpling graphene exceeds, by about an order of magnitude, the expected voltage generation, indicating the benefit of exploiting the large strain gradients that are possible at the nanoscale. Finally, we demonstrate that crumpling may be a superior mechanism of flexoelectric energy generation as compared to bending of two-dimensional nanomaterials.
ASJC Scopus subject areas
- Physics and Astronomy(all)
- General Physics and Astronomy
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In: Journal of applied physics, Vol. 129, No. 22, 225107, 14.06.2021.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Flexoelectric electricity generation by crumpling graphene
AU - Javvaji, Brahmanandam
AU - Zhang, Ranran
AU - Zhuang, Xiaoying
AU - Park, Harold S.
N1 - Funding Information: X. Zhuang would like to acknowledge the ERC Starting Grant (No. 802205) and NSFC (No. 11772234).
PY - 2021/6/14
Y1 - 2021/6/14
N2 - We utilize atomistic simulations that account for point charges and dipoles to demonstrate that flexoelectricity, which arises from strain gradients, can be exploited to generate electricity from crumpled graphene sheets. Indentation of a circular graphene sheet generates localized developable (d)-cones, for which we verify the core radius and azimuthal angle with established theoretical models. We determine the voltage that can be generated based on the resulting electrostatic fields and compare the voltage generation to previous theoretical predictions that are scaled down to the nanoscale. In doing so, we find that the voltage generated from crumpling graphene exceeds, by about an order of magnitude, the expected voltage generation, indicating the benefit of exploiting the large strain gradients that are possible at the nanoscale. Finally, we demonstrate that crumpling may be a superior mechanism of flexoelectric energy generation as compared to bending of two-dimensional nanomaterials.
AB - We utilize atomistic simulations that account for point charges and dipoles to demonstrate that flexoelectricity, which arises from strain gradients, can be exploited to generate electricity from crumpled graphene sheets. Indentation of a circular graphene sheet generates localized developable (d)-cones, for which we verify the core radius and azimuthal angle with established theoretical models. We determine the voltage that can be generated based on the resulting electrostatic fields and compare the voltage generation to previous theoretical predictions that are scaled down to the nanoscale. In doing so, we find that the voltage generated from crumpling graphene exceeds, by about an order of magnitude, the expected voltage generation, indicating the benefit of exploiting the large strain gradients that are possible at the nanoscale. Finally, we demonstrate that crumpling may be a superior mechanism of flexoelectric energy generation as compared to bending of two-dimensional nanomaterials.
UR - http://www.scopus.com/inward/record.url?scp=85107943819&partnerID=8YFLogxK
U2 - 10.1063/5.0052482
DO - 10.1063/5.0052482
M3 - Article
AN - SCOPUS:85107943819
VL - 129
JO - Journal of applied physics
JF - Journal of applied physics
SN - 0021-8979
IS - 22
M1 - 225107
ER -