期刊
ACS NANO
卷 13, 期 4, 页码 4640-4646出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsnano.9b00750
关键词
triboelectric generator; MoS2; ferroelectric composites; polarization; surface charge
类别
资金
- Basic Science Research Program through the National Research Foundation of Korea [NRF-2017R1A4A1015744, NRF-2019R1A2C1010384]
Performance enhancement of triboelectric nanogenerators (TENGs) has been largely limited by the relatively low output current density. Thus, extensive research efforts have been made to increase the output current density. In this respect, this work presents a method to effectively increase output current density of TENGs by adopting polarized ferroelectric polymers and MoS2 composite. Specifically, by compositing bulk MoS2 flakes with both Nylon-11 and PVDF-TrFE, respectively, charge density of each triboelectric charging surface was significantly increased. In addition, proper polarization of both ferroelectric composite layers has also led to an additional increase in the charge density. A combination of them synergistically increases the surface charge density, generating huge output current and the power output density. By optimizing the fabrication process, the output voltage and current density up to similar to 145 V and similar to 350 mu A/cm(2) are achieved, respectively. Consequently, the TENG exhibits a recordable output power density of similar to 50 mW/cm(2), which is one of the highest output power densities reported to date. The method introduced in this work can greatly increase the output current density of TENGs, facilitating the development of high-performance triboelectric energy harvesting devices.
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