Abstract: A device for treating a user's skin using plasma is provided. The device comprises a plasma generation assembly and a power supply. The plasma generation assembly comprises a discharge electrode including a first surface; a first dielectric material layer provided on the first surface of the discharge electrode and the first surface, a ground electrode surrounding the discharge electrode, and an insulation member spacing around the discharge electrode from the ground electrode. The power supply configured to apply power to the plasma generation assembly so that plasma is generated from the first surface of the discharge electrode to the ground electrode and between the first dielectric material layer and the user's skin.

Abstract: The present disclosure discloses a method for recycling all types of lithium batteries. First, the lithium battery waste is acid-leached to obtain a solution containing most of metal ions. After filtering, the solution is separated from the remaining solids, and then the obtained solution is subjected to separate precipitation many times. After separately adjusting the pH value of the solution many times, adding precipitants with a high selectivity ratio, and matching with filtration and separation reaction, all ions in the lithium battery waste are sequentially precipitated in forms of iron phosphate (FePO4), aluminum hydroxide (Al(OH)3), manganese oxide (MnO2), dicobalt trioxide (cobalt oxide, Co2O3), nickel hydroxide (Ni(OH)2), and lithium carbonate (Li2CO3).

Abstract: A conducting cord includes an outer layer, an aluminum foil layer mounted in the outer layer, an insulating layer mounted in the aluminum foil layer, a signal line module mounted in the insulating layer, and at least one ground wire mounted in the aluminum foil layer. When the signal lines produce a static electricity, the static electricity is conducted through the electrically conducting inner face of the aluminum foil layer into the ground wire and is conducted outwardly from the ground wire. Thus, when the conducting cord is placed in a computer, the conducting cord will not produce an electromagnetic wave to prevent the electromagnetic wave from damaging other electronic parts of the computer.