[en] A compendium of the reports of nine workshops held to ascertain new directions and priorities for energy related basic research in the materials sciences program is presented. Topics covered include: electronic, magnetic, optical and thermal properties; surface science; x-ray, neutron and electron scattering; low temperature research and superconductivity; phase transformations, stability and materials interactions; defects, diffusion and radiation effects; engineering materials science; mechanical properties; and thermodynamics and electrochemistry