期刊
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
卷 6, 期 2, 页码 1919-1933出版社
AMER CHEMICAL SOC
DOI: 10.1021/acssuschemeng.7b03337
关键词
0.3BCT-0.7BST nanoparticles; Piezoelectric-triboelectric nanogenerator; Self-powered air pressure sensor; Surface charge density; Surface modification
资金
- National Research Foundation of Korea (NRF) - Korea Government Grant [2016R1A2B2013831]
The scalable synthesis of an irregular composite surface impregnated with high-performance piezoelectric 0.3Ba(0.7)Ca(0.3)TiO(3)-0.7BaSn(0.12)Ti(0.88)O(3) nanoparticles (0.3BCT-0.7BST NPs) for enhancing the power density of hybrid nanogenerators (H-NGs) using a contact-separation structure is reported for the first time. The designed high-performance butterfly wing structure type multiunit system, consisting of four simple arc-shaped H-NGs, has dual functionality as a stand-alone power source for light-emitting diodes and charging Li coin cells and as a self-powered air pressure sensor. Manyfold increments of the open-circuit voltage (Voc(p-p) = 572 V) and short-circuit current (Isc(p-p) = 1.752 mA) were observed for H-NG with an irregular surface compared with a piezoelectric nanogenerator (P-NG) (VOC(p-p) = 53 V, Isc(p-p) = 2.366 mu A). Compared with the power density of a flat surface based H-NG (333 W/m(2)), the power density of a single arc-shaped H-NG with an irregular surface was 4-fold higher at 1336 W/m(2), and that with a micropillar surface was twice as high (632 W/m(2)). A high functional property of fillers along with polydimethylsiloxane matrix improves the surface charge density of the composite film. The surface charge density of the H-NG was greatly influenced by the distance between the active layers, micropores, thickness, relative permittivity, and applied force.
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