An international group of researchers from the University of Manchester (UK) and Shandong University (China), led by Dr. Ernie Hill, have developed a nano-device called a ballistic rectifier that converts exhaust heat into electricity.
As you know, some parts of the exhaust system of a running car can heat up to 600 ° C. According to scientists, the recovered energy would be quite enough to power some systems, in particular, the air conditioner and the power steering, and the remaining energy can be "stored" in the battery.
The ballistic rectifier was made possible solely by graphene, which imparts ultra-high mobility to electrons. Unlike similar "non-graphene" devices operating at cryogenically low temperatures, this device is quite suitable for normal room temperature.
The author of the term "ballistic rectifier" Professor Song, speaking of its future, noted:
"Unlike conventional rectifiers or diodes, the ballistic rectifier has no threshold voltage, making it ideal for energy harvesting, and also suitable for use in microwave ovens and infrared detectors."