Patent ID: 7682740
Filing Date: 2010-03-23
Classification: H01M,Y02E

Abstract:
1. An electrode comprising: a first organic/inorganic composite porous coating layer formed directly on a surface of the electrode, said electrode comprising an anode active material or a cathode active material bonded to a current collector, wherein said first organic/inorganic composite porous coating layer comprises: a mixture of inorganic particles and a binder polymer, wherein the inorganic particles have a particle diameter of between 0.001 and 10 μm, the binder polymer has a solubility parameter of between 17.0 and 30 [J the inorganic particles are interconnected among themselves and are fixed by the binder polymer, interstitial volumes among the inorganic particles form a plurality of pores, whose pore size ranges from 0.001 to 10 μm, the inorganic particles are present in the mixture of inorganic particles with the binder polymer in an amount of 50-99 wt % based on 100 wt % of the mixture, the electrode having said first organic/inorganic composite porous coating layer in an assembled and functioning electrochemical device and eliminates the need for an independent separator, and the first organic/inorganic composite porous coating layer has a porosity of between 10 and 95%.