Research Center of Lightweight Structures and Intelligent Manufacturing, State Key Laboratory of Mechanics and Control of Mechanical Structures, Nanjing University of Aeronautics and Astronautics, ...

However, the same graphite structure fails when it comes to sodium or potassium. Their atoms are simply too big and interactions too complex to slide in and out of graphite's tightly packed layers.

However, the same graphite structure fails when it comes to sodium or potassium. Their atoms are simply too big and interactions too complex to slide in and out of graphite’s tightly packed layers.