Abstract
Electrochemical intercalation of lithium has been carried out using a cathode of pyrographite in a LiClO 4-ethylene carbonate (EC) electrolyte. Charge and discharge curves present slopes and plateaus related to the existence of pure phases and biphasic systems respectively. Binary graphite-lithium intercalation compounds of stages I, II, III and IV were isolated and identified based on their (00 l) X-ray diffraction diagrams. Our experimental conditions allow the obtention of compounds which do not contain coinserted solvent molecules, even for low stage materials.
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