Method For Manufacturing A Porous Electrode, And Microbattery Containing Such An Electrode

Abstract: A method for manufacturing an electrode having a porosity of between 20% and 60% by volume and pores with an average diameter smaller than 50 nm, which method comprises: (a) providing a substrate and a colloidal suspension comprising aggregates or agglomerates of monodisperse primary nanoparticles of an electrode active material, having an average primary diameter Dso of between 2 and 100 nm, said aggregates or agglomerates having an average diameter Dso of between 50 nm and 300 nm, (b) depositing, on said substrate, a layer originating from said colloidal suspension, using a technique selected from the group formed by: electrophoresis, a printing technique, and a coating technique; (c) drying said layer obtained in step (b) and consolidating it, by pressing and/or heating, to obtain a mesoporous layer, (d) depositing, on and inside the pores of said layer, a coating of an electron-conducting material. This porous electrode may be used in lithium-ion microbatteries.

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