As early as the 1830s, Michael Faraday found that changes in the surrounding magnetic field would generate electricity in the wire. In the the 1890s, Nikola, a Serbian-born scientist, applied for an initial patent.
Unfortunately, this research has been delayed for a century. The biggest hurdle is inefficient transmission and danger. Electromagnetic radiation is only suitable for transmitting information and is not suitable for transmitting energy. Because the radiation is not directional, energy will be wasted in useless space. Some people envision the use of directional electromagnetic radiation, such as laser, but its operability is not strong and extremely dangerous.
Researchers at MIT in the United States have made new advances in wireless power transmission, using a power supply, two meters away, to light a 60-watt light bulb on a "separate ground".
Soliacic design, the wireless energy transmission of the radiation has a distance limitation, the smaller the receiver the shorter the distance. He calculates that the size of a laptop can receive wireless energy over a few meters, "so that installing a source in each room will power the entire home laptop." ”
Soliacic hopes to increase efficiency to 70% to 80% through the use of different materials and improved technology. They believe the improved equipment will charge laptops, mobile phones and other devices wirelessly for 3-5 years.