An Adhesive Surface Enables High-Performance Mechanical Energy Harvesting with Unique Frequency-Insensitive and Pressure-Enhanced Output Characteristics

Jianliang Gong, Bingang Xu, Yujue Yang, Mengjie Wu, Bao Yang

    Research output: Journal article publicationJournal articleAcademic researchpeer-review

    9 Citations (Scopus)

    Abstract

    Viscoelastic polymer adhesives (VPAs) are common materials broadly used in adhesive tapes for bonding objects tightly in daily life. This work presents a conceptually new strategy of using contact electrification (rather than strong adhesion) of VPAs to directly convert mechanical energy to electric energy, generally showing 202–419% of the electric energy generated by conventional mechanical energy harvesters under the same triggering conditions. More notably, the VPA-based generators (VPAGs) possess unique frequency-insensitive and pressure-enhanced output characteristics. The output power of a VPAG not only does not show regular degradation of performance with the decrease of triggering frequency, but also can be further enhanced by simple introduction of a second VPA layer with a smaller area to increase the applied pressure without the requirement of rising applied force. The average output power density of a VPAG with a second layer of 0.5 cm × 0.5 cm can reach 216.7 µW cm−2, which is ≈150% larger than that of a VPAG without a second VPA layer. This research is of significance to harvesting the random, irregular, and low-frequency (bio-)mechanical energy that widely exists but is wasted in the environment for both stable electric energy generation and electronic device operation.

    Original languageEnglish
    Article number1907948
    JournalAdvanced Materials
    Volume32
    Issue number14
    DOIs
    Publication statusPublished - 1 Apr 2020

    Keywords

    • adhesive surfaces
    • contact electrification
    • frequency insensitivity
    • mechanical energy harvesters
    • pressure enhancement

    ASJC Scopus subject areas

    • Materials Science(all)
    • Mechanics of Materials
    • Mechanical Engineering

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