MOFs—or metal-organic frameworks—are highly customizable porous network solids featuring cages that can come in many sizes and can attract and hold a variety of chemical components, such as carbon dioxide, methane, and hydrogen gases. And it’s this versatile specificity that gives MOFs so much potential for applications in next-generation batteries and in carbon capture, among a growing list. Despite their many positive traits, their open, porous structure—which holds on to electrons—isn’t ideal for applications that require electrons to freely flow with ions (charged particles) through a device to create an electric current.