摘要:
A disordered multicomponent MgNi based electrochemical hydrogen storage material having a microstructure including a substantial volume fraction characterized by intermediate range order and exhibiting extraordinarily high storage capacity and methods of fabricating same.
摘要:
Non-uniform heterogeneous powder particles for electrochemical uses, and said powder particles comprising at least two separate and distinct hydrogen storage alloys selected from the group consisting of: Ovonic LaNi.sub.5 type alloys, Ovonic TiNi type alloys, and Ovonic MgNi based alloys.
摘要:
A solid state battery including at least one multilayered battery cell comprising: 1) a layer of negative electrode material; 2) a layer of positive electrode material; and 3) a layer of perovskite-type oxide material disposed between the layer of positive electrode material and the layer of negative electrode material, where said layer of perovskite-type oxide material is electrically insulating and capable of readily conducting or transporting protons.
摘要:
A hydrogen storage alloy having the atomic formula AB4.75-5.25. Where A may comprise at least 85 atomic percent Nd and less than 15 atomic percent other rare earth elements and Mg and B may comprise Ni, Co, and at least one element selected from the group consisting of Mn and Al. The atomic percentages of Mn and Al may be governed by the following formulas where Mn and Al are in atomic percent: 1) Mn+1.5 Al≧6 atomic percent; and 2) Mn+Al≦12 atomic percent. The total percent of Mn and Al may provide the alloy with a 20° C. plateau pressure of between 4 and 25 psi, preferably between 6 and 20 psi. The hydrogen storage alloy allows a nickel metal hydride battery into which it is incorporated to maintain a voltage of at least 1.2 V at a depth of discharge of 90%.
摘要:
A low temperature alkaline fuel cell having a hydrogen electrode and an oxygen electrode, both of which are comprised of high performance non-precious metal catalytic materials providing high performance at low temperatures.
摘要:
A novel method for forming powder of a hydrogen storage alloy without the need for further mechanical processing. The alloy powder may be adapted for use as the negative electrode material of rechargeable electrochemical, hydrogen storage cells. The method includes the step of controlling the hydrogen concentration within the hydrogen storage alloy to form powder where 90% of the particles are less than 250 microns in average dimension.
摘要:
A multi-phase metal hydride alloy material which is capable of reversibly absorbing and desorbing hydrogen includes a first main phase or group of phases having an ABx type crystalline structure and a second phase which has a concentration of a modifier element therein which is greater than the concentration of the modifier element in the first phase or group of phases. The modifier element functions to promote the formation of the second phase and may comprise a light rare earth element such as yttrium. The first phase or group of phases may incorporate one or more Laves phases such as a C14, C15, and/or C36 phase. Further disclosed are metal hydride batteries including the alloys.
摘要:
A solid state battery including at least one multilayered battery cell comprising: 1) a layer of negative electrode material; 2) a layer of positive electrode material; and 3) a layer of perovskite-type oxide material disposed between the layer of positive electrode material and the layer of negative electrode material, where said layer of perovskite-type oxide material is electrically insulating and capable of readily conducting or transporting protons.
摘要:
A fuel cell. The anode of the fuel cell comprises a hydrogen oxidation catalyst comprising a finely divided metal alloy particulate. The metal alloy particulate has an average particle size of less than about 100 Angstroms.
摘要:
A BCC phase hydrogen storage alloy capable of storing approximately 4.0 wt. % hydrogen and delivering reversibly up to 3.0 wt. % hydrogen at temperatures up to 110° C. The hydrogen storage alloys also possess excellent kinetics whereby up to 80% of the hydrogen storage capacity of the hydrogen storage alloy may be reached in 30 seconds and 80% of the total hydrogen storage capacity may be desorbed from the hydrogen storage alloy in 90 seconds. The hydrogen storage alloys also have excellent stability which provides for long cycle life.