Experimental results point out that the said copolymer electret film is a polar material, i. e. there exist both oriented dipoles and deposited space charges in the film after charging.
2
加热和充电的结合释放出电子, 电子通过真空管加速撞击到对面充满正电的电极上。
The combination of heat and charge releases electrons, which accelerate through the tube and strike a positively charged electrode at the other end.
It relies on the same principle employed in lithium-ion batteries-moving sodium or potassium ions between electrodes during charging and discharging-but does it much more cheaply.