fig2

Figure 2. Working mechanism of the magnetic force separation and the FL-TENG. (A) Magnetic moment distribution inside the steel sheet without an external magnetic field. (B) Hysteresis loop of the Si-Mn steel sheet. (C) Magnetic repulsion and separation of the steel sheet due to tangential magnetization under a tangential external magnetic field. (D) COMSOL simulation of the surface magnetic charge density to illustrate the magnetization effect. (E) Force analysis diagram of a single steel sheet in the friction layer. (F) Magnetic attraction and contact of the steel sheet due to normal magnetization under a normal external magnetic field. (G) Working principle of the FL-TENG under the alternatingly coated method. (H) Difference in transferred charge among different coated methods.