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Reduced graphene-oxide acting as electron-trapping sites in the friction layer for giant triboelectric enhancement

Title
Reduced graphene-oxide acting as electron-trapping sites in the friction layer for giant triboelectric enhancement
Author
김태환
Keywords
Reduced graphene oxide; Triboelectric nanogenerators; Triboelectric enhancement; Electron-trapping; Nanocomposites
Issue Date
2017-02
Publisher
ELSEVIER SCIENCE BV
Citation
NANO ENERGY, v. 32, page. 542-550
Abstract
The continuously seeking of approaches for enhancing the output of triboelectric nanogenerators (TENGs) has always been the goal of researchers attempting to harvest mechanical energy efficiently. Here a novel methodology for enhancing the output performance of the TENG by introducing electron traps into the common friction layer has been firstly developed. For this purpose, reduced graphene oxide (rGO) embedded in the friction layer has been used as electron traps. Because the triboelectric electrons generated on the surface of a polyimide layer can be efficiently captured and stored in rGO sheets due to the interaction between the rGO sheets and the polyimide layer, the loss of triboelectric electrons can be suppressed. The maximum output power density of a vertical contact-separation mode TENG containing rGO sheets reached 6.3 W/m(2), which was 30 times larger than that of a device without rGO sheets. We also showed that the output performance of the lateral sliding-mode TENG, which is the other fundamental working mode of the TENG, can be enhanced due to the advantage of additional electron trapping in the friction layer, indicating that the concept demonstrated in this work holds potential for providing significant enhancements in next-generation triboelectric devices.
URI
https://www.sciencedirect.com/science/article/pii/S2211285516305997?via%3Dihubhttp://repository.hanyang.ac.kr/handle/20.500.11754/112892
ISSN
2211-2855; 2211-3282
DOI
10.1016/j.nanoen.2016.12.035
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > ELECTRONIC ENGINEERING(융합전자공학부) > Articles
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