High-Performance Triboelectric Devices via Dielectric Polarization: A Review

Nanoscale Research Letters

Doo-Seung Um¹  Hyunhyub Ko²  Young-Eun Shin²  Minsoo P. Kim² 

[1] Department of Electrical Engineering, Sejong University, Seoul, Republic of Korea;School of Energy and Chemical Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan, South Korea;

关键词: Dielectric polarization;    Triboelectric;    Relative permittivity;    Energy harvesting;    Self-powered sensor;   

DOI  :  10.1186/s11671-021-03492-4

来源: Springer

【 摘 要 】

Energy harvesting devices based on the triboelectric effect have attracted great attention because of their higher output performance compared to other nanogenerators, which have been utilized in various wearable applications. Based on the working mechanism, the triboelectric performance is mainly proportional to the surface charge density of the triboelectric materials. Various approaches, such as modification of the surface functional group and dielectric composition of the triboelectric materials, have been employed to enhance the surface charge density, leading to improvements in triboelectric performances. Notably, tuning the dielectric properties of triboelectric materials can significantly increase the surface charge density because the surface charge is proportional to the relative permittivity of the triboelectric material. The relative dielectric constant is modified by dielectric polarization, such as electronic, vibrational (or atomic), orientation (or dipolar), ionic, and interfacial polarization. Therefore, such polarization represents a critical factor toward improving the dielectric constant and consequent triboelectric performance. In this review, we summarize the recent insights on the improvement of triboelectric performance via enhanced dielectric polarization.

【 授权许可】

CC BY