Documents / Report
This Defense Intelligence Reference Document from the Defense Intelligence Agency, dated 1 November 2010, was one of a series of advanced technology reports produced in FY 2010 under the Advanced Aerospace Weapons System Applications (AAWSA) Program. It reviews ultracapacitors as energy and power storage devices. It covers how they work, their materials, their commercial and military uses, and new developments such as carbon nanotubes, thin films and magnetic capacitors. It concludes that the U.S. government must understand and adopt advanced ultracapacitors.
UNCLASSIFIED//F'iA. 'iFFllil,r,I, 1,1li! 811LI/ - CDC film Sintered TiC plate / TiC plate CJ Teflon plates \ SOOT - Electrolyte+ separator TiC•CDC film ,/ 2 Ceil c1ssr,mbly Figure 10. CDC Synthesis and Electrochemical Test Cell Preparation Schematic. 42 Electrochemical measurements of CDC films were carried out in a three-electrode configuration with a large, overcapacitive activated carbon counter-electrode in both 1M TEABF4 and 1M H2SO4, as well as two-electrode cells with symmetric bulk CDC film electrodes. Volumetric capacitance was calculated for each of the different film thicknesses (shown in Figure 11). For both TEABF4 and H2SO4, the volumetric capacitance decreases with increasing coating thickness. This is especially pronounced in the organic electrolyte, where there is a huge increase in volumetric capacitance as the film thickness decreases from 200 to ~2 mm. A B'80 '80 " "E '60 E '60 ii. ''° Li ,<Q w w u '20C m u 120C m •u WO •~ u mo •~ • • •u 80 •u 80 •~ " 60 • ~ 60 •E E 0 '°:g • • • 0 ,o :g 20 20 0 250 050 100 150 200 20 40 60 80 100 120 140 Coating thickness (μm) Coat,ng thickness (.Lim) Figure 11. Volumetric Capacitance of the Films in (A) TEABF4 and (B) H2S04. 43 MAGNETIC CAPACITORS Giant magneto capacitance (GMC) is a quantum mechanical effect observed in thin-film structures composed of alternating ferromagnetic and nonmagnetic layers. 44 , 45 Such materials have been reported to have increased permittivity by 109 . 46 This material behavior normally occurs at temperatures well below 273K and has only recently been reported in the literature above this temperature. 47 However, since 2007, Northern Lights Semiconductor Corp. (NLSC) has been developing a magnetic capacitor (MCap) that utilizes a material which exhibits the GMC above 300K. Structured like the basic flat-plate capacitor, an MCap nanocell features a proprietary dielectric layer sandwiched between two magnetized layers. Each magnetic material layer is made of multiple nanometer-thick thin-film layers. Millions of MCap nanocells are created and linked using a semiconductor thin-film process, producing the MCap cell on a wafer (Figure 12). 21 UNCLASSIFIED/;«F&lil 8FFI&I.t.k Wlili a,.k\f
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Report, from the dia 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.