If you add more lithium to the positive electrode of a lithium-ion battery, it can store much more charge in the same amount of space, theoretically powering an electric car 30 to 50 percent farther between charges. But these lithium-rich cathodes quickly lose voltage, and years of research have not been able to pin down why—until now.
Image: Electric car makers are intensely interested in lithium-rich battery cathodes made of layers of lithium sandwiched between layers of transition-metal oxides. Such cathodes could significantly increase driving range.
Credit: Stanford University/3Dgraphic