Probing Contact Electrification: A Cohesively Sticky Problem

التفاصيل البيبلوغرافية
العنوان: Probing Contact Electrification: A Cohesively Sticky Problem
المؤلفون: Peter C. Sherrell, Liva Germane, Renzo A. Fenati, Osvalds Verners, Nick A. Shepelin, Andris Šutka, Amanda V. Ellis, Linards Lapčinskis, Martin Timusk, Kaspars Malnieks
المصدر: ACS applied materialsinterfaces. 13(37)
سنة النشر: 2021
مصطلحات موضوعية: chemistry.chemical_classification, Materials science, Charge density, 02 engineering and technology, Electron, Polymer, 010402 general chemistry, 021001 nanoscience & nanotechnology, 01 natural sciences, 0104 chemical sciences, Electron transfer, chemistry, Chemical physics, Energy transformation, General Materials Science, 0210 nano-technology, Contact electrification, Mechanical energy, Triboelectric effect
الوصف: Contact electrification and the triboelectric effect are complex processes for mechanical-to-electrical energy conversion, particularly for highly deformable polymers. While generating relatively low power density, contact electrification can occur at the contact-separation interface between nearly any two polymer surfaces. This ubiquitousness of surfaces enables contact electrification to be an important phenomenon to understand energy conversion and harvesting applications. The mechanism of charge generation between polymeric materials remains ambiguous, with electron transfer, material (also known as mass) transfer, and adsorbed chemical species transfer (including induced ionization of water and other molecules) all being proposed as the primary source of the measured charge. Often, all sources of charge, except electron transfer, are dismissed in the case of triboelectric energy harvesters, leading to the generation of the "triboelectric series", governed by the ability of a polymer to lose, or accept, an electron. Here, this sole focus on electron transfer is challenged through rigorous experiments, measuring charge density in polymer-polymer (196 polymer combinations), polymer-glass (14 polymers), and polymer-liquid metal (14 polymers) systems. Through the investigation of these interfaces, clear evidence of material transfer via heterolytic bond cleavage is provided. Based on these results, a generalized model considering the cohesive energy density of polymers as the critical parameter for polymer contact electrification is discussed. This discussion clearly shows that material transfer must be accounted for when discussing the source of charge generated by polymeric mechanical energy harvesters. Thus, a correlated physical property to understand the triboelectric series is provided.
تدمد: 1944-8252
URL الوصول: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2369e638bf9effeeb4c3c903d83f4a9e
https://pubmed.ncbi.nlm.nih.gov/34498850
Rights: CLOSED
رقم الانضمام: edsair.doi.dedup.....2369e638bf9effeeb4c3c903d83f4a9e
قاعدة البيانات: OpenAIRE