In Nevada and other US states, entrepreneurs are anticipating the coming boom in retired lithium-ion batteries from electric cars and hoping to create a market for recycled minerals. Thirty miles east of Reno, Nevada, past dusty hills patched with muted blue sage and the occasional injury-lawyer billboard, a large concrete structure rises prominently in the desert landscape. When fully constructed, it will be a pilot for a business that entrepreneurs envision as a major facet of America’s future green economy: lithium-ion battery recycling.