Abstract:
A method and apparatus are disclosed wherein a battery comprises at least one electrode formed from a graphitic carbon nanostructured surface wherein the nanostructured surface consists of a plurality of nanoposts formed from graphitic carbon such that the graphitic nanoposts serve both as an operational feature (i.e., dielectric/electrode) and control feature of the battery itself. In one embodiment, the nanostructured surface consists of a plurality of nanoposts wherein a select portion of each nanopost is formed to serve as the dielectric of the nanostructured battery, and the balance of each nanopost is utilized to impart the control features to the nanostructured battery.
Abstract:
A mechanical switch includes a pair of conducting contacts, metal located on and between the conducting contacts, a heater, and an electro-mechanical actuator. The heater is operable to apply heat that melts the metal. The electro-mechanical actuator is capable of moving one or both of the conducting contacts in a manner that causes the metal to either start physically bridging the conducting contacts or to stop physically bridging the conducting contacts.
Abstract:
A lead-acid battery according to the invention contains an electrode grid structure that comprises dispersoid-containing lead having relatively high strength and good corrosion resistance. The dispersoid particles exemplarily are selected from the oxides, nitrides and carbides that are substantially insoluble in lead and in sulfuric acid of concentration suitable for use in a lead-acid battery. Significantly, the dispersoid-containing lead has average grain size of at least 20 .mu.m. In consequence of the relatively large grain size, the total length of grain boundaries exposed to electrolyte is relatively small, and corrosion resistance is improved. Exemplary techniques for forming the dispersoid-containing lead are disclosed.
Abstract:
A nonaqueous, lithium cell is described which exhibits excellent safety characteristics when exposed to abusive testing, as well as high energy density, good charge and discharge rates, and long recycle life. Particularly unique is the composition of the electrolyte which contains such substances as ethylene carbonate, propylene carbonate and one or more polyethylene glycol dialkyl ethers.
Abstract:
An apparatus that comprises a membrane having a plurality of fluid-support-structures and openings located between the fluid-support-structures. The fluid-support-structures have at least one dimension that that is about 1 millimeter or less. The apparatus also comprises a wicking material positioned adjacent to a surface of the membrane. When a fluid locatable on a surface of the fluid-support-structures penetrates the fluid-support-structures, at least a portion of the fluid passes through the openings and into the wicking material.
Abstract:
A device 100 comprising a substrate 115 having crystal-support-structures 110 thereon, and a III-V crystal 210. The III-V crystal is on a single contact region 140 of one of the crystal-support-structures. An area of the contact region is no more than about 50 percent of a surface area 320 of the III-V crystal.
Abstract:
A method comprising forming a structural element 115 on a surface 620 of a layer 510 via an electroless plating of nickel or cobalt 130 onto the surface, the layer being rigidly fixed to an underlying substrate 110. The method also comprises etching away a portion of the layer such that a part of the structural element is able to move with respect to the substrate.
Abstract:
An apparatus comprising a stack of layers, each of the layers having one or two surfaces that contact neighboring ones of the layers. At least one of the layers comprises a mesh layer, and, a shear thickening fluid is located within the mesh layer or in another layer of the stack of layers.
Abstract:
Apparatus and method for increasing the concentration of a chemical substance in a fluid comprise a micro-fluidic elongated channel formed in a substrate, with the channel being in fluid-flow communication with an ambient region along its elongated dimension. In general, the fluid includes first and second chemical substances having different vapor pressures. The apparatus includes an evaporation controller for increasing the evaporation rate of the fluid from the channel into the ambient region, thereby increasing the concentration of the higher vapor pressure (HVP) substance in the portion of the fluid remaining in the channel and increasing the concentration of the lower vapor pressure (LVP) substance in the portion of the fluid evaporated into the ambient region.
Abstract:
Metal hydrides are activated by an electrochemical procedure. In this procedure, a bulk sample of the corresponding metal is immersed in an aqueous electrolyte and contacted by a cathode. Current passed through the aqueous electrolyte causes electrolysis of the water and a concomitant reaction with the formation of metal hydride. As a result, the metal hydride is fractured and smaller particles result. Additionally, the resulting metal hydride has a substantial amount of absorbed hydrogen. A novel plating method, taking advantage of the reducing power of hydrogen absorbed in a metal hydride, is useful to encapsulate such metal hydride with a variety of metals. Therefore, such hydrides are uniformly coated by using plating solutions without the standard reducing agent and stabilizer.