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This Defense Intelligence Reference Document was prepared by the Defense Intelligence Agency's Defense Warning Office and dated 1 November 2010. It is one of a series of advanced technology reports produced under the Advanced Aerospace Weapons System Applications Program. The report reviews how ultracapacitors work, how they compare with batteries, their history and materials, and their commercial, military and aerospace uses. It concludes that new materials and cell designs will raise energy density and that the U.S. government must understand the devices' spectral signatures.
From the source:Release of 2026-09-18 Incident: 11/1/10, Las Vegas, Nevada. Released with redactions. 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.
“The Advance”13 pages
UNCLASSIFIED1fFOR 8ffl@IAL tt9! e"t I Chapter 6 : Conclusions Ultracapacitors are becoming increasingly important in applications ranging from portable electronics to cargo transport cranes. Their introduction in electronic circuits for conversion and storage assistance will become the next major milestone. The virtually unlimited cycle life combined with high power capabilities has made them an integral component to many energy-management schemes. Early adoption of ultracaps by the military was an important differentiator for vehicle performance and a technology driver. Improvements to activated carbons and manufacturing techniques have brought costs down. The ultracapacitor is relatively young and is expanding rapidly as ultracaps are reaching a more widespread audience. Increased adoption has led to recognition of the benefits, and the attention has allowed researchers to develop a better understanding of the power-storage mechanisms. New materials and cell designs will produce increased capacitance and higher voltages, which will in turn give ultracapacitors better energy density. Advanced carbons show great promise to generate a carbon electrode with much higher capacitance than the activated carbons in use today. These include porous carbons, carbon nanotubes, and graphene. Capacitance increases by the carbon electrode alone could double the energy density. Additional advantages in conductivity and the ability to functionalize these materials will generate improvements in power density as well as energy density. Hybrid systems utilizing a battery-like electrode are beginning to gain acceptance. These pseudocapacitive systems maintain the high power density of a symmetric ultracap and also have substantially higher energy density. While these systems sacrifice some cycle-life capability, it appears as though they will survive tens of thousands of cycles. Ultracapacitors are a solution for generating or absorbing high pulse power. They also are excellent devices for backup power and stabilization of fluctuating power requirements. Increased power densities and energy densities will open up new applications for ultracaps, replacing fuel and batteries in some cases, supplementing them in others. Power management and generation for military systems will see increasing uses for ultracaps. Their unique capabilities will enable future designs. Their specific performance capabilities must be optimally utilized and we must have a keen understanding and awareness of the unique spectral signatures these devices generate when storing high power and in charge or discharge modes. Development of these advanced ultracaps must be performed, understood, and adopted by the U.S. government and those who are developing the systems to be used by the government. UNCLASSIFIEO/fFOA OFFI&I:.l.b YS& ONLY 27
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Official release, from the pursue collection. The PDF is mirrored here; the original link is above. 34 pages are in the text index: search them above, or from the library's search.