Organic/inorganic composite porous layer-coated electrode and electrochemical device comprising the same

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 [J1/2/cm3/2],
• 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%.