Abstract
Yuegang Zhang is determined to make a better battery. The physicist and materials scientist started his career developing new ways to manufacture and use carbon nanotubes. In 2008, while at Lawrence Berkeley National Laboratory, he found himself drawn to perfecting a promising—but challenging—battery technology based on lithium-sulfur chemistry. He tested a variety of carbon nanomaterials to make a sulfur cathode that could pair with a lithium metal anode. In 2012, driven by the desire to commercialize lithium-sulfur batteries for drones and electric vehicles, Zhang returned to his home country of China to start a company. Katherine Bourzac sat down with him to discuss his progress. Why are lithium-sulfur batteries so promising? If everything works well, a lithium-sulfur battery can store five times as much energy by mass as current lithium-ion batteries. Because sulfur is lightweight, these batteries have high potential to be used in applications such as drones. And if
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