Engineering topics

Singhal, Amit

Publications and source records attributed to Singhal, Amit.

4 records

NASA NTRS2011

Silicone nanocomposite coatings for fabrics

A silicone based coating for fabrics utilizing dual nanocomposite fillers providing enhanced mechanical and thermal properties to the silicone base. The first filler includes nanoclusters of polydimethylsiloxane (PDMS) and a metal oxide and a second filler of exfoliated clay nanoparticles. The coating is particularly suitable for inflatable fabrics used in several space, military, and consumer applications, including airbags, parachutes, rafts, boat sails, and inflatable shelters.

Eberts, Kenneth↗

NASA NTRS2008

Method of Making Fine Lithium Iron Phosphate/Carbon-Based Powders with an Olivine Type Structure

Processes for producing fine LiFePO.sub.4/C and nanostructured LiFe.sub.xM.sub.1-xPO.sub.4/C composite powders, where 1.ltoreq.x.ltoreq.0.1 and M is a metal cation. Electrodes made of either nanostructured LiFe.sub.xM.sub.1-xPO.sub.4 powders or nanostructured LiFe.sub.xM.sub.1-xPO.sub.4/C composite powders exhibit excellent electrochemical properties. That will provide high power density, low cost and environmentally friendly rechargeable Li-ion batteries.

Singhal, Amit↗

NASA NTRS2005

Nanostructured and layered lithium manganese oxide and method of manufacturing the same

Nanostructured and layered lithium manganese oxide powders and methods of producing same. The powders are represented by the chemical formula, LixMn1-yMyO2, where 0.5<x<1.33, 0?y?0.5 and have an average primary particle diameter from 5 nm to 300 nm, preferably between 5 and 100 nm, and M is at least one cation dopant. The powders can be formed into active cathode materials in Li-ion and Li rechargeable batteries.

Singhal, Amit↗

NASA NTRS2005

Nanostructured MnO2-Based Cathodes for Li-Ion/Polymer Cells

Nanostructured MnO2-based cathodes for Li-ion/polymer electrochemical cells have been investigated in a continuing effort to develop safe, high-energy-density, reliable, low-toxicity, rechargeable batteries for a variety of applications in NASA programs and in mass-produced commercial electronic equipment. Whereas the energy densities of state-of-the-art lithium-ion/polymer batteries range from 150 to 175 W h/kg, the goal of this effort is to increase the typical energy density to about 250 W h/kg. It is also expected that an incidental benefit of this effort will be increases in power densities because the distances over which Li ions must diffuse through nanostructured cathode materials are smaller than those through solid bulk cathode materials.

Skandan, Ganesh↗