A novel vibrational energy harvester with electric double layer electrets

[摘要] We propose a new type of vibrational energy harvester with an electric double layer (EDL) electrets. Instead of using any external bias-voltage source or dielectric layer on top of the metal electrode to sustain EDL, we succeed to anchor the ions to polymer network to form the EDL electrets. By changing contact area between the EDL electrets and the electrode, large electric current is generated in the circuit. Owing to extremely large capacitance of the EDL electret, vibrational energy harvesters have the unique capability to leverage the high- density charge accumulation to the electrode and obtained current density becomes as high as 200 μA/cm2with output voltage of 1V even with low frequency vibrations as low as 1 Hz.

[发布机构] Central Research Institute of Electric Power Industry, Yokosuka, Kanagawa; 240-0196, Japan^1;Saginomiya Seisakusho INC. Sayama, Saitama; 350-1395, Japan^2;Institute of Industrial Science, University of Tokyo, Meguro, Tokyo; 153-8505, Japan^3

[效力级别] 能源学

[关键词] Density charges;Dielectric layer;Electric double layer;Low-frequency vibration;Metal electrodes;Output voltages;Polymer networks;Vibrational energies