Abstract: A fuel cell system includes hydrogen and oxygen storage vessels, a fuel cell stack, an air feed, an oxygen feed creating an internal oxygen pressure, at least one cathode and at least one cathode exhaust. The system can alternate between the air feed and/or the oxygen feed to the cathode of the fuel cell with air operation at lower power draw conditions and oxygen operation at higher power draw conditions. Oxygen may be recirculated from the cathode exhaust at a rate higher than stoichiometric and internal oxygen pressure may rise to above 1.1 bar. An automated control system can recirculate oxygen after air is expelled from the fuel cell stack, and there may be a recirculation of cathode exhaust, particularly a recirculation of oxygen exhaust. The fuel cell may be configured having ports with removeable connections for refilling the hydrogen storage vessel and the oxygen storage vessel.

Abstract: The instant invention includes a spherical porous secondary silicon-based particle and methods for producing the same. The spherical porous secondary silicon-based particle is comprised of agglomerated primary silicon-based nanoparticles. The secondary particle comprises a carbon coating that reduces the effective exposed surface area of the primary particles to the electrolyte, thus improving first cycle efficiency. The secondary particle further comprises porous regions that enable the silicon nanoparticles to expand during lithiation. Advantages include ease of castability with micron-sized spherical particles, ease of mixing spherical particles, ease of flow for spherical particles in various processing steps, and ease with obtaining higher loading, which translates to higher areal capacity and overall energy density of the cell. A readily scalable process for producing the particles using low-cost materials and low-cost processing methods is disclosed.

Abstract: A novel electrochemical cell is disclosed in multiple embodiments. The instant invention relates to an electrochemical cell design. In one embodiment, the cell design can electrolyze water into pressurized hydrogen using low-cost materials. In another embodiment, the cell design can convert hydrogen and oxygen into electricity. In another embodiment, the cell design can electrolyze water into hydrogen and oxygen for storage, then later convert the stored hydrogen and oxygen back into electricity and water. In some embodiments, the cell operates with a wide internal pressure differential.

Abstract: A novel carbon formation reactor for forming carbon from a carbon-bearing fluidic stream, and method of using the same, is described. The reactor uses a catalyst bearing surface placed within a heated zone in a carbon-bearing fluidic stream to form carbon, which can then be removed from the reactor, with the process repeatable to achieve high extraction efficiencies.

Abstract: A novel electrochemical cell is disclosed in multiple embodiments. The instant invention relates to an electrochemical cell design. In one embodiment, the cell design can electrolyze water into pressurized hydrogen using low-cost materials. In another embodiment, the cell design can convert hydrogen and oxygen into electricity. In another embodiment, the cell design can electrolyze water into hydrogen and oxygen for storage, then later convert the stored hydrogen and oxygen back into electricity and water. In some embodiments, the cell operates with a wide internal pressure differential.

Abstract: A novel electrochemical cell is disclosed in multiple embodiments. The instant invention relates to an electrochemical cell design. In one embodiment, the cell design can electrolyze water into pressurized hydrogen using low-cost materials. In another embodiment, the cell design can convert hydrogen and oxygen into electricity. In another embodiment, the cell design can electrolyze water into hydrogen and oxygen for storage, then later convert the stored hydrogen and oxygen back into electricity and water.

Abstract: The instant invention includes a spherical porous secondary silicon-based particle and methods for producing the same. The spherical porous secondary silicon-based particle is comprised of agglomerated primary silicon-based nanoparticles. The secondary particle comprises a carbon coating that reduces the effective exposed surface area of the primary particles to the electrolyte, thus improving first cycle efficiency. The secondary particle further comprises porous regions that enable the silicon nanoparticles to expand during lithiation. Advantages include ease of castability with micron-sized spherical particles, ease of mixing spherical particles, ease of flow for spherical particles in various processing steps, and ease with obtaining higher loading, which translates to higher areal capacity and overall energy density of the cell. A readily scalable process for producing the particles using low-cost materials and low-cost processing methods is disclosed.

Abstract: A sulfur tolerant anode current collector material includes a mesh or foam that includes a cermet. The cermet includes a metallic component and a ceramic component. The metallic component includes nickel, an alloy including nickel and cobalt, or a mixture including a nickel compound and a cobalt compound. The ceramic component includes a mixed conducting electrolyte material.

Abstract: This invention discloses a multifunctional electrode additive and methods for forming electrodes that incorporate the additive. The additive may be an electro-active carbon, such as nitrogen and/or phosphorous doped carbon, with functional groups that form a hydrophobic surface. The additive has a combination of properties that make it useful in a number of electrode and other applications.

Abstract: A novel electrochemical cell is disclosed in multiple embodiments. The instant invention relates to an electrochemical cell design. In one embodiment, the cell design can electrolyze water into pressurized hydrogen using low-cost materials. In another embodiment, the cell design can convert hydrogen and oxygen into electricity. In another embodiment, the cell design can electrolyze water into hydrogen and oxygen for storage, then later convert the stored hydrogen and oxygen back into electricity and water.

Abstract: A liquid fuel battery is described, having a vented case, an internal fuel chamber, and a plurality of substantially planar vertically stacked battery elements having separated fuel-sides and air sides. Such sides are separated by a series of anodic and cathodic seals. In one embodiment, a cathode contains doped carbon nanofibers and may be treated with polytetrafluoroethylene or another hydrophobic material. An anode current collector and/or cathode current collector may contain perforated metal, including metal mesh. Battery elements may be U-shaped to maximize the efficiency of the air-fuel interaction. The cathode is active for oxygen reduction and inactive for fuel oxidation.

Abstract: A novel carbon formation reactor for forming carbon from a carbon-bearing fluidic stream, and method of using the same, is described. The reactor uses a catalyst bearing surface placed within a heated zone in a carbon-bearing fluidic stream to form carbon, which can then be removed from the reactor, with the process repeatable to achieve high extraction efficiencies.

Abstract: Electrode materials systems for planar solid oxide fuel cells with high electrochemical performance including anode materials that provide exceptional long-term durability when used in reducing gases and cathode materials that provide exceptional long-term durability when used in oxygen-containing gases. The anode materials may comprise a cermet in which the metal component is a cobalt-nickel alloy. These anode materials provide exceptional long-term durability when used in reducing gases, e.g., in SOFCs with sulfur contaminated fuels. The cermet also may comprise a mixed-conducting ceria-based electrolyte material. The anode may have a bi-layer structure. A cerium oxide-based interfacial layer with mixed electronic and ionic conduction may be provided at the electrolyte/anode interface.

Abstract: A chromium-free water-gas shift catalyst. In contrast to industry standard water-gas catalysts including chromium, a chromium-free water-gas shift catalyst is prepared using iron, boron, copper, aluminum and mixtures thereof. The improved catalyst provides enhanced thermal stability and avoidance of potentially dangerous chromium.

Abstract: A method of forming boron nitride nanoparticles. A plurality of precursor molecules comprising boron, nitrogen and hydrogen may be decomposed in a first heating zone to form a plurality of gaseous molecules that contain bonded boron and nitrogen, followed by heating to a second, higher temperature thereby causing the gaseous molecules to react and nucleate to form a plurality of boron nitride nanoparticles. Depending on processing temperatures, the boron nitride nanoparticles may include amorphous, crystalline, and spherical forms, or combinations thereof. Precursor molecules may include ammonia borane, borazine, cycloborazanes, polyaminoborane, polyiminoborane, and mixtures thereof. The boron nitride nanoparticles may be incorporated into a variety of dispersions, composites, and coatings; and in some embodiments, may be a component of a propellant.

Abstract: A method of forming boron nitride nanoparticles. A plurality of precursor molecules comprising boron, nitrogen and hydrogen may be decomposed in a first heating zone to form a plurality of gaseous molecules that contain bonded boron and nitrogen, followed by heating to a second, higher temperature thereby causing the gaseous molecules to react and nucleate to form a plurality of boron nitride nanoparticles. Depending on processing temperatures, the boron nitride nanoparticles may include amorphous forms, crystalline forms, or combinations thereof. Precursor molecules may include ammonia borane, borazine, cycloborazanes, polyaminoborane, polyiminoborane, and mixtures thereof. The boron nitride nanoparticles may be incorporated into a variety of dispersions, composites, and coatings; and in one embodiment, may be a component of a propellant, wherein the boron nitride nanoparticles may confer a range of advantages to gun barrels in which such propellants may be fired.

Abstract: Electrode materials systems for planar solid oxide fuel cells with high electrochemical performance including anode materials that provide exceptional long-term durability when used in reducing gases and cathode materials that provide exceptional long-term durability when used in oxygen-containing gases. The anode materials may comprise a cermet in which the metal component is a cobalt-nickel alloy. These anode materials provide exceptional long-term durability when used in reducing gases, e.g., in SOFCs with sulfur contaminated fuels. The cermet also may comprise a mixed-conducting ceria-based electrolyte material. The anode may have a bi-layer structure. A cerium oxide-based interfacial layer with mixed electronic and ionic conduction may be provided at the electrolyte/anode interface.

Abstract: Amperometric ceramic electrochemical cells comprise, in one embodiment, an electrolyte layer, a sensing electrode layer comprising a ceramic phase and a metallic phase, and a counter electrode layer, wherein the cell is operable in an oxidizing atmosphere and under an applied bias to exhibit enhanced reduction of oxygen molecules at the sensing electrode in the presence of one or more target gases such as nitrogen oxides (NOX) or NH3 and a resulting increase in oxygen ion flux through the cell. In another embodiment, amperometric ceramic electrochemical cells comprise an electrolyte layer comprising a continuous network of a first material which is ionically conducting at an operating temperature of about 200 to 550° C.; a counter electrode layer comprising a continuous network of a second material which is electrically conductive at an operating temperature of about 200 to 550° C.

Abstract: A liquid fuel battery is described, having a vented case, an internal fuel chamber, and a plurality of substantially planar vertically stacked battery elements having separated fuel-sides and air sides. Such sides are separated by a series of anodic and cathodic seals. In one embodiment, a cathode contains doped carbon nanofibers and may be treated with polytetrafluoroethylene or another hydrophobic material. An anode current collector and/or cathode current collector may contain perforated metal, including metal mesh. Battery elements may be U-shaped to maximize the efficiency of the air-fuel interaction. The cathode is active for oxygen reduction and inactive for fuel oxidation.

Abstract: Electrode materials systems for planar solid oxide fuel cells with high electrochemical performance including anode materials that provide exceptional long-term durability when used in reducing gases and cathode materials that provide exceptional long-term durability when used in oxygen-containing gases. The anode materials may comprise a cermet in which the metal component is a cobalt-nickel alloy. These anode materials provide exceptional long-term durability when used in reducing gases, e.g., in SOFCs with sulfur contaminated fuels. The cermet also may comprise a mixed-conducting ceria-based electrolyte material. The anode may have a bi-layer structure. A cerium oxide-based interfacial layer with mixed electronic and ionic conduction may be provided at the electrolyte/anode interface.