Boosting the Efficient Energy Output of Electret Nanogenerators by Suppressing Air Breakdown under Ambient Conditions

• DOI: 10.1021/acsami.8b19599
• Publication Date: 2019-01-03T13:28:53Z
• Authors: Zisheng Xu; Jiangjiang Duan; Wenbo Li; Nan Wu; Yuan Pan; Shizhe Lin; Jia Li; Fang Yuan; Shuwen Chen; Liang Huang; Bin Hu; Jun Zhou
• Keywords: Nanogenerator; Electret; Polyvinylidene fluoride; Charge density; Surface charge; Mechanical energy

By virtue of simple fabrication, low cost, and high conversion efficiency, nanogenerators play a key role in promoting the development self-powered systems large-scale mechanical energy harvesting. Efforts have been ongoing for improving output power by maximizing their surface charge density via modification or structure optimization. Nevertheless, because inevitable air breakdown during operation process, enhancing is not retainable, which most crucial limitation performance nanogenerators. Here, suppressing strategy developed to remarkably enhance nanogenerator embedding dielectric film (polyvinylidene fluoride) with permittivity into gaps. Because suppression strongly field-induced polarization effect, ∼470 μC m–2 obtained at ambient condition, ∼4 times larger than value conventional breakdown. In addition, effects different materials thicknesses are also studied nanogenerator. These results provide guide design state-of-the-art efficient