MALTBY, Snohomish County — Just across the road from a cafe boasting the world’s largest cinnamon rolls is a small manufacturing plant carved out of the woods of what was once rural Western Washington.Inside this building, carbon is infused with a silicon gas to produce a black powdery substance that high-profile investors hope will be a key component of the next generation of electric car batteries enabling them to travel farther between plug-ins, recharge faster and cost less.“It’s transformational,” said Rick Luebbe, chief executive officer of Group14 Technologies, which opened the Maltby plant in 2021 and has raised $441 million in funding. The company employs nearly 100 people, and the industrial workplace north of Woodinville has the…
