The lithium - Carbon electrode in polymer electrolyte

Carbonaceous materials of different types are used ire polymer electrolyte based lithium cells in order to evaluate their electrochemical performance for application as negative pole in lithium-ion type batteries. The formation of a passivating film during the first cathodic polarization may account for the low Faradaic yield of the first cycle. It also plays an important role in the stabilisation of the carbon/polymer electrolyte interface. Non-graphitized Meso-Carbon leads to higher reversible capacity (410 mAh/g) than the graphitized one. It is suggested that lithium could be reversibly stored as a multilayer ''deposit'' on the carbon surface. A model of epitaxial lithium electroplating is presented here.