General Motors Co. is working with electric-vehicle charging operator EVgo to build a nationwide fast-charging infrastructure as the automaker prepares a major push into battery-powered models. The two companies will jointly invest in 2,750 fast chargers in cities and suburbs across the U.S. as GM moves to solve a chicken-and-egg problem that comes with selling EVs: A sparse network of chargers has turned off some potential buyers, but utilities and charging companies have been loath to expand the infrastructure until more plug-ins are on the road. “We know how important the charging ecosystem is for drivers, one that includes access to convenient and reliable public fast charging,” Mary Barra, GM’s chief executive officer, said in a statement. “Our relationship with EVgo will bolster the public fast-charging network available to EV customers ahead of increased market […]