Multilayer material based on active lithium, preparation method and applications in electrochemical generators

• Main Authors: GAUTHIER MICHEL, PETITCLERC MICHEL, DONTIGNY MARTIN, ZAGUIB KARIM
• Format: Patent
• Language: Chinese; English
• Published: 22.07.2009
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRICITY; LAYERED PRODUCTS; LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT ORNON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM; PERFORMING OPERATIONS; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY; TRANSPORTING

The invention concerns a method for producing a multilayer material based on active lithium, consisting of the deposition of an active lithium film on a protection layer with a sufficient speed to substantially avoid oxidation of the lithium and/ or over a sufficient period such that the adhesion of the lithium occurs upon contact with the protection layer. A multilayer material of the invention presents excellent impedance stability and absence of dendrite formation after the cycling process, when incorporated into an electrochemical battery as anode. The batteries, the anode of which is composed of a multilayer material of the invention are particularly efficient with respect to their coulombic efficiency.