NOVELTY - Designing or analyzing three-dimensional electrochemical system comprises anode, cathode, separator, electrolyte, and current collectors involves providing computer generated relationship between first characteristics referenced against second characteristics for selected material set for design of three dimensional spatial elements in the electrochemical cell; selecting first or second characteristics for selected material set; and using first or second characteristics to design of the electrochemical cell having particle feature sizes of less than 100 microns.    USE - For designing three-dimensional electrochemical system (claimed), useful in portable electronics (e.g. cell phones, personal digital assistants, music players, video cameras), power tools, power supplies for military use (communications, lighting, imaging), power supplies for aerospace applications (power for satellites), and power supplies for vehicle applications (hybrid electric vehicles, plug-in hybrid electric vehicles, and fully electric vehicles).    ADVANTAGE - The method provides systematic process to evaluate the modification, so that performance parameters meet the design criteria. The performance parameters include lifetime, safety/mechanical/kinetic, thermal, ion concentration, voltage profile, degree of intercalation, degree of achievable capacity under various discharge rate or discharge profile, intercalation- induced stresses, and volume changes.    DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for computer-aided system for processing information related to a three-dimensional electrochemical system comprising computer readable memory comprising computer codes for outputting a computer generated relationship between first characteristics referenced against second characteristics for selected material set for design of three dimensional spatial elements in three-dimensional electrochemical cell; codes directed to selecting the first characteristics or second characteristics for the selected material set; codes directed to processing the selected first or second characteristics to determine whether the first or second characteristics is within predetermined performance parameters; and codes directed to executing a program for processing the first characteristics or second characteristics to provide the three dimensional electrochemical cell having particle feature sizes of less than 100 microns.