Documents / Official release
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
UNCLASSIFIED1/FOR 8ffl@IAL tt.!! 8flt I Chapter 5: Future Developments There have been significant advancements in ultracapacitor t echnology in the last few years. Increased understanding of the physical mechanism behind th is technology, combined with advancements in materials science, particularly on the nanoscale, has led to a rapid increase in capability. Improvements to ultracaps in the next 10 years (2010-20) will focus on electrodes, better electrolytes, packaging, and alternative designs. Electrode improvements will most likely include migration away from activated carbon, for both electrodes. Asymmetric electrodes will el iminate carbon on one side, and new carbon materials will provide better performance at a competitive price. Electrolytes will likely move toward additional organic materials and ultracaps with high temperatu re performance requirements likely will use ionic liqu ids . In the near term, a transition to the asymmetric design is expected. Continued improvements to the electrodes and cell design will provide better capacitance. Many of the short-term improvements will likely be directed toward manufacturing capacity . Ultracapacitors are becom ing more common, and as improvements to performance and cost make them more accessible to multiple applications, this trend will continue. Over the next few years, it is expected that the market for ultracaps will increase dramatically . Trends in materials for ultracaps will continue forward with improvements and utilization of activated carbons, thinner current collectors, and improved cell design and packaging. Research being done at universities and national labs will continue, but these will not become common materials for ultracapacitors in the next few years. However, as the demand for ultracapacitors increases, specialty materials will begin to see utility for some applicat ions, driving down manufacturing costs, wh ich in turn will enable their use in more systems. Significant use will be made in integrating into power converters to reduce size, mass, and cost. Both th in-film and MCap devices wi ll become prevalent. If MCaps achieve lithium ion specific energy their adoption will be rapid and revolutionary as has occurred with LiFePO4 (lithium-iron-phosphate) batteries for both transportation and extremely high pulsed-power systems such as lasers. Within the next 10 yea rs, ultracaps will beg in to see the incorporation of advanced ca rbon materials and electrodes designed with features on the nanometer sca le. Carbon nanotubes, graphene, and porous carbons all have extremely high potential to unseat activated carbon as the electrode of choice. The rep lacement of carbon systems being used today (including activated carbon, aerogels, and carbon cloths) will occur as cost reductions take place in the manufacturing of nanostructured carbonaceous materials. The tradeoff between surface area and pore size can be exploited at the nanoscale. Optimization of these parameters will likely yield fairly sign ificant improvements to the capacitance and resu lt in higher power and better energy density. The mid-range (2020 -30) development of ult racapacitors wil l most likely be the full incorporation of advanced carbons and hybrid systems. It is hard to anticipate wh ich technology has the most to offer, as there are unique benefits and hurdles for each. Hybrid systems will be common, utilizing a battery-like electrode combined with one of the advanced carbon electrodes. The pseudocapacitive electrode options will become diversified, with manufacturers using unique materials to differentiate their product. An alternative electrode to the ruthenium oxide (RuO2) used today will be used for both performance and economical reasons. Supply issues will drive electrode materials toward those with larger ava ilability. UNCLASSIFIEO/fFOA OFFl€il.t.k YSE O,.Llf 25
Not linked to a story yet.
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.