期刊
NANOSCALE RESEARCH LETTERS
卷 16, 期 1, 页码 -出版社
SPRINGER
DOI: 10.1186/s11671-021-03492-4
关键词
Dielectric polarization; Triboelectric; Relative permittivity; Energy harvesting; Self-powered sensor
资金
- National Research Foundation (NRF) of Korea [2018R1A2A1A05079100, 2019R1I1A1A01060653]
- Ministry of Trade, Industry and Energy [20010566]
- National Research Foundation of Korea [2019R1I1A1A01060653] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
Energy harvesting devices based on triboelectric effect have attracted attention for their high output performance, and improving triboelectric performance relies on enhanced dielectric polarization, with adjusting dielectric properties of materials playing a crucial role.
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.
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