HIGH REVERSIBLE CAPACITY CARBON-LITHIUM NEGATIVE ELECTRODE IN POLYMERELECTROLYTE

Carbonaceous materials from different types are used in polymer electr olyte-based lithium cells in order to evaluate their electrochemical p erformance during lithium storage in the application as the negative e lectrode in lithium-ion-type batteries. The formation of a passivating film during the first cathodic polarization may account for the low f aradaic yield of the first cycle. It also plays an important role in t he stabilization of the carbon/polymer electrolyte interface. Non-grap hitized meso-carbon micro beads lead to a higher capacity of 410 mAh/g than the graphitized one. It is suggested that lithium could be rever sibly stored as a multilayer 'deposit' at the carbon surface. A model of epitaxial lithium electroplating is presented.