Graphene generators could let you recharge a phone with your breath

 作者:浑轾     |      日期:2019-03-14 04:16:02
Ken Biggs / Alamy Stock Photo By Douglas Heaven Don’t you hate it when your phone battery dies? In the future, you might be able to recharge your gadget by breathing on it, thanks to a technique that harvests electricity from moisture in the air. Water droplets might seem an unlikely source of energy, but then can hold a form of static electricity called hygroelectricity, which is thought to be the source of electric charge that causes lightning. This charge can be transferred from droplets to other tiny particles,