Gm Global Technolgoy Operations, Inc.

Applied Sciences, Inc.

Patrick D Lake

David Joseph Burton

Andrew Palmer

Gholam-Abbas Nazri

Max L Lake

Maryam Nazri

Carla Leer R Castro

Methods of making a cathode element for an electrochemical cell. The methods comprise providing hollow carbon nanotubes and a sulfur source in a closed environment. Sulfur is deposited within an interior of the hollow carbon nanotube. The method includes cleaning an exterior surface of the carbon nanotubes and incorporating the carbon nanotubes into a cathode element. A cathodic material for a lithium-sulfur electrochemical cell is also provided. The material comprises a plurality of stacked-cone carbon nanotubes. Each nanotube defines a hollow interior and has a substantially continuous exterior surface area. Elemental sulfur is disposed within the hollow interior of each nanotube.

Encapsulated sulfur cathode for lithium ion battery

A method of making a polymer composite from a mixture of a polymeric material, carbon nanofibers, and nano-scale particles is provided. The carbon nanofibers are less than about 1 micrometer in diameter, and the nano-scale particles are shorter in length than the carbon nanofibers. The nano-scale particles are selected from nano-scale carbon additives, non-conductive nano-clays, nano-scale conductive metallic additives, or combinations thereof. The components are mixed to form a polymer composite. A polymer composite having a resistivity of less than about 10ohm-cm is also described.

Nanocarbon-reinforced polymer composite and method of making

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Beavercreek, OH, United States of America

Patrick D Lake