In situ investigation of the interaction between graphite and electrolyte solutions

The formation of a solid electrolyte interphase (SEI) before and during lithium intercalation was studied on graphite electrodes in ethylene carbonate based electrolytes. We demonstrated by using in situ mass spectrometry that during the first charge of the graphite electrode ethylene gas is evolved in a potential window that corresponds to the formation of a SEI. Moreover, development of hydrogen gas was detected even in dry electrolytes containing