Techniques are generally described herein for the design, manufacture and use of composite dielectric materials. Embodiments include, but are not limited to, methods, apparatuses, and systems. Other embodiments may also be disclosed and claimed. Some techniques described herein include electrophoretic deposition of dielectric particles to conformally form a thin layer of dielectric material for use in energy storage devices. Example energy storage devices include capacitor devices, which in some instances may be used to replace and/or assist in the operation of batteries, ultra-capacitors, and other similar devices.