Srivastava S.,Cornell University |
Schaefer J.L.,Cornell University |
Yang Z.,Nohms Technologies, Inc. |
Tu Z.,Cornell University |
Archer L.A.,Cornell University
Polymer-particle composites are used in virtually every field of technology. When the particles approach nanometer dimensions, large interfacial regions are created. In favorable situations, the spatial distribution of these interfaces can be controlled to create new hybrid materials with physical and transport properties inaccessible in their constituents or poorly prepared mixtures. This review surveys progress in the last decade in understanding phase behavior, structure, and properties of nanoparticle-polymer composites. The review takes a decidedly polymers perspective and explores how physical and chemical approaches may be employed to create hybrids with controlled distribution of particles. Applications are studied in two contexts of contemporary interest: battery electrolytes and electrodes. In the former, the role of dispersed and aggregated particles on ion-transport is considered. In the latter, the polymer is employed in such small quantities that it has been historically given titles such as binder and carbon precursor that underscore its perceived secondary role. Considering the myriad functions the binder plays in an electrode, it is surprising that highly filled composites have not received more attention. Opportunities in this and related areas are highlighted where recent advances in synthesis and polymer science are inspiring new approaches, and where newcomers to the field could make important contributions. Polymer-particle composites are used in virtually every field of technology. When the particles approach nanometer dimensions, large interfacial regions are created that can be exploited for applications. The fundamental approaches and bottom-up synthesis strategies for understanding and controlling nanoparticle dispersion in polymers are reviewed. Applications of these approaches for creating polymer-particle composite electrolytes and electrodes for energy storage are also considered. © 2013 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim. Source
Nohms Technologies, Inc. | Date: 2014-10-17
This invention provides for a functionalized porous carbon particle comprising a porous carbon particle linked to a functional group having affinity for a polysulfide, a porous solvent infused carbon particle comprising the porous carbon particle thereof, and a positive electrode comprising the porous carbon particle thereof.
Agency: Department of Health and Human Services | Branch: | Program: SBIR | Phase: Phase I | Award Amount: 149.84K | Year: 2014
Project Summary NOHMs Technologies proposes to develop a novel Lithium-Sulfur (Li-S) battery system as a reliable emergency power source for assistive medical equipment. NOHMs Li-S battery can increase the energy delivery time in a power outage from 2 hours to 24 hours or more, while yielding a significant reduction in weight, size, and cost compared to existing emergency power supply systems. Li-S offers one of the highest theoretical energy densities (2.3 kWh/kg) among rechargeable batteries. The proposedtechnology is based on innovative sulfur-infused carbon composite cathode materials and safer electrolytes. These materials overcome the poor cycle life problems that have limited commercialization of lithium-sulfur batteries by encapsulating sulfur in nanometer-sized mesoporous carbon capsules (S C) and with novel electrolytes that overcome lithium batteries safety issues associated with the metallic lithium anode. The Phase I project focuses on the development and design of a high energy Li-S battery su
Nohms Technologies, Inc. | Date: 2015-05-15
Agency: National Aeronautics and Space Administration | Branch: | Program: SBIR | Phase: Phase I | Award Amount: 124.72K | Year: 2014
NOHMs Technologies proposes to develop a novel ionic liquid electrolyte formulation developed for the Lithium-Sulfur chemistry that can protect the lithium metal and has demonstrated superior performance and safety characteristics with the potential to offer 600 Wh/kg on the cell level. For this NASA Phase I project, NOHMs Technologies will optimize our proprietary ionic liquid electrolyte and demonstrate how the electrolyte provides safe, non-flammable high-energy performance and provides Li-metal protection. NOHMs will provide full cell data and analysis to demonstrate the feasibility of our system to meet NASA's 'Far Term Mission' specific energy and energy density goals. The battery technology under development by NOHMs is capable of delivering batteries with specific energies that are three times higher than today's state of the art Li-ion battery systems. For NASA missions, this can be translated into increased operational range, functionality, or payload capabilities and significantly reduced operational cost. NASA applications.