NOVELTY - The article comprises a porous support structure formed by assembling spherical particles present in contact with each other. The porous support structure comprises pores, and has a porosity of 65-75%. The particles (50%) have maximum cross-sectional dimensions of 20 microns to 5 mm and/or minimum cross-sectional dimensions of 0.5-10 microns, and define a total quantity of particulate material. The pores of the porous support structure have a total pore volume defined by the sum of each of the individual pore volumes.    USE - The article including a porous structure is useful as electrode for energy storage devices (claimed) such as electrochemical cells, where the electrode is useful in secondary batteries such as rechargeable batteries including lithium-sulfur batteries and the electrochemical cells are useful for electric vehicles, load-leveling devices such as solar-or wind-based energy platforms and portable electronic devices.    ADVANTAGE - The article including a porous support structures enhances performance, charge and/or discharge characteristics and lifetime of the electrochemical cell, has increased electrical conductivity, enhanced mechanical stability, high structural integrity and specific capacity, excellent cycle life, uniform porosity and particle size, and allows effective operation of the electrochemical cell.    DETAILED DESCRIPTION - The article comprises a porous support structure formed by assembling spherical particles present in contact with each other. The porous support structure comprises pores, and has a porosity of 65-75%. The particles (50%) have maximum cross-sectional dimensions of 20 microns to 5 mm and/or minimum cross-sectional dimensions of 0.5-10 microns, and define a total quantity of particulate material. The pores of the porous support structure have a total pore volume defined by the sum of each of the individual pore volumes. All of the total pore volume is occupied by pores having cross-sectional diameters of 0.1-10 microns. The particles comprise carbon comprising graphene, graphite, carbon black, acetylene black, carbon fibers, carbon nano fibers, hollow carbon tubes, carbon filaments and polymer, and have an aspect ratio of 3:1. An INDEPENDENT CLAIM is included for a method of making a porous support structure.    DESCRIPTION OF DRAWING(S) - The diagram shows a schematic view of electrochemical cell.    Cell (10)    Substrate (20)    Cathode (30)    Surface (32)    Electrolyte (40)    Anode. (50)