DOW-UAP-D147

AAWSAP DIRD, Ultracapacitors as Energy and Power Storage Devices, November 2010

Preview description (machine-generated): Microscope image of a thin sheet of graphene, presented as a potential material suitable for use within ultracapacitor electrodes.

Official description

This document is a Defense Intelligence Reference Document (DIRD), a technical reference format used by the Defense Intelligence Agency (DIA) to capture baseline knowledge on a specific topic for later analytic use. DIRDs are best understood as reference and synthesis products rather than as original research. It is one of 38 DIRDs produced under the Advanced Aerospace Weapon System Applications Program (AAWSAP) between 2009 and 2011. Because AAWSAP’s scope permitted a broad range of supporting topics, not every DIRD in the series directly concerns aerospace systems or future threat assessment. The following summary reflects the DIRD’s scope and framing at the time of writing and should not be read as implying current validation of the concepts discussed. This DIRD surveys ultracapacitors as high-power energy-storage devices and argues that their main value lies in extremely rapid charge and discharge, very long cycle life, and usefulness in systems that need short bursts of power rather than sustained energy delivery. The report explains how ultracapacitors differ from batteries, reviews the materials and cell designs that determine their performance, and emphasizes that they are especially useful for power stabilization, backup power, load leveling, regenerative braking, and other applications where fast energy transfer matters more than total stored energy. It also notes their drawbacks, including lower energy density, self-discharge, and voltage-management requirements that limit their usefulness as stand-alone replacements for batteries in many applications. The document presents ultracapacitors as a maturing and increasingly important technology whose most credible aerospace and military uses lie in pulsed-power, missile and munitions systems, electric propulsion support, and other hybrid power architectures rather than in long-duration primary energy storage.

Reproduced verbatim from the releasing agency.

AI summary

This document is a Defense Intelligence Reference Document (DIRD) that examines ultracapacitors as energy storage devices, highlighting their ability for rapid charge and discharge, long cycle life, and applications requiring quick energy release. It outlines how these devices differ from traditional batteries, their potential uses in aerospace and military systems, and also discusses their limitations such as lower energy density and self-discharge issues. This information is relevant as it contributes to understanding emerging technologies within defense applications.