摘要:
A method of activating a hydrogen storage alloy or a hydrogen storage alloy electrode. The method includes the step of contacting the hydrogen alloy or hydrogen storage alloy electrode with an aqueous solution of an alkali metal hydroxide where the concentration of the alkali metal hydroxide is at least about 40 weight percent. The method produces a hydrogen storage alloy and hydrogen storage alloy electrode with increased surface area.
摘要:
A modified Ti-V-Zr-Ni-Mn-Cr electrochemical hydrogen storage alloy which has at least one of the following characteristics: 1) an increased charge/discharge rate capability over that the base Ti-V-Zr-Ni-Mn-Cr electrochemical hydrogen storage alloy; 2) a formation cycling requirement which is reduced to one tenth that of the base Ti-V-Zr-Ni-Mn-Cr electrochemical hydrogen storage alloy; 3) no chemical/thermal activation of the modified alloy is required to attain full operating capacity as is required by the base Ti-V-Zr-Ni-Mn-Cr electrochemical hydrogen storage alloy: and 4) an oxide surface layer having a higher electrochemical hydrogen storage catalytic activity than the base Ti-V-Zr-Ni-Mn-Cr electrochemical hydrogen storage alloy.
摘要:
Lithiated composite materials and methods of manufacture are provided that are capable of imparting excellent capacity and greatly improved cycle life in lithium-ion secondary cells. By supplementing a high nickel content lithium storage material with a transition metal oxide lithium storage material or a dopant at relatively low levels, the capacity of the high nickel content lithium storage materials is maintained while cycle life is dramatically improved. These characteristics are promoted by methods of producing the materials that intermix unlithiated precursor materials with a lithium source and sintering the materials together in a single sintering reaction. The resulting lithiated composite materials provide for the first time both high capacity and excellent cycle life to predominantly high nickel content electrodes.
摘要:
A supported catalytic material including multiple mixed-valence nanoclustered metal or metal oxide catalytic layers or regions and/or multiple organometallic catalytic layers. The supported catalytic material may include two or more compositionally-distinct mixed-valence nanoclustered metal or metal oxide layers or regions arranged as layers or discrete regions. The mixed-valence regions or layers may include two or more metals in two or more oxidation states. The supported catalytic material may also include two or more compositionally- distinct organometallic regions or layers, where the layers or regions differ with respect to the chemical identity of the metal and/or ligands to which the metal is coordinated.
摘要:
A modified Ti-V-Zr-Ni-Mn-Cr electrochemical hydrogen storage alloy which has at least one of the following characteristics: 1) an increased charge/discharge rate capability over that the base Ti-V-Zr-Ni-Mn-Cr electrochemical hydrogen storage alloy; 2) a formation cycling requirement which is reduced to one tenth that of the base Ti-V-Zr-Ni-Mn-Cr electrochemical hydrogen storage alloy; 3) no chemical/thermal activation of the modified alloy is required to attain full operating capacity as is required by the base Ti-V-Zr-Ni-Mn-Cr electrochemical hydrogen storage alloy: and 4) an oxide surface layer having a higher electrochemical hydrogen storage catalytic activity than the base Ti-V-Zr-Ni-Mn-Cr electrochemical hydrogen storage alloy.
摘要:
A composite positive electrode material for use in electrochemical cells. The composite material may comprise a particle of positive electrode material, and a conductive material at least partially embedded within the particle of positive electrode material. The material may comprise a particle of positive electrode material, and a nucleating particle at least partially embedded therein.
摘要:
A process for producing hydrogen gas from hydrocarbon and oxygenated hydrocarbon compounds. The process includes combining a hydrocarbon or oxygenated hydrocarbon compound with a base to form a mixture that undergoes a reaction to produce hydrogen gas. The reaction mixture optionally includes water and/or a catalyst. In a preferred embodiment, hydrogen production occurs from methanol in the liquid phase without the production of environmentally harmful by-product gases.
摘要:
An active composition for an electrode of an electrochemical cell. The active composition comprises an electrode material, and a nonfibrillating polymeric binder. The polymeric binder may comprise a fluoradditive. Also disclosed is an electrode and an electrochemical cell comprising the active composition.