7,446 research outputs found
Hydrogen gas-rechargeable metal hydride electrode for Ni-MH battery
No full text[[abstract]]Some nonbreakable pellets made of an AB(5) alloy and metallic powder Ag or Ni were used as the anode in a Ni-MH battery such that the anode could be charged in hydrogen gas and discharged in electrolyte. The performance is influenced by the alloy properties, electrode porosity, hydrogen pressure, discharge current, electrolyte polarization, and contamination in the system. For the pellet Ag/AB(5) = 10, continuous discharge can proceed but only for a limited time. The lower porosity of the pellet may be the main problem. For the pellet Ni/AB(5) = 25, it can be discharged unlimitedly at a constant hydrogen pressure of 20 atm. When discharged with a fixed amount of hydrogen gas, the adsorbed hydrogen is immediately discharged on the surface rather than being absorbed into the bulk, and the discharge capacity comes mostly from the gaseous hydrogen rather than from the hydrogen already dissolved in the bulk of alloy. Therefore, the pellet acts more like a catalyst for hydrogen dissociation than as an absorbent. Furthermore, a minimum of similar to 7 atm of hydrogen pressure is required for the system to operate properly. It is suggested that, in order for such a system to operate better under the wet condition, a higher hydrogen gas pressure be maintained to accelerate the hydrogenation rate and more porous pellets be used for faster reaction kinetics. (c) 2005 The Electrochemical Society. [DOI: 10.1149/1.1938087] All rights reserved.[[note]]SC
Study characteristics for studies measuring DVA, MH, and SU.
No full textStudy characteristics for studies measuring DVA, MH, and SU.</p
Study characteristics for studies measuring MH and SU.
No full textStudy characteristics for studies measuring MH and SU.</p
Comparative direct electrophysiological effects of propofol on the conduction system and ionic channels of rabbit hearts.
No full textPostnatal maturation of inwardly rectifying potassium current in isolated ventricular myocytes.
No full textAge-related differences in the direct cardiac effects of cisapride: narrower safety range in the hearts of young rabbits.
No full textMorphological comparisons of Taiwan native wild tea plant (Camellia sinensis (L.) O. Kuntze forma formosensis Kitamura) and two closely related taxa using numerical methods.
No full textElectrophysiological profile after inward rectifier K channel blockade by barium in isolated rabbit hearts. Altered repolarization and unmasked decremental conduction property.
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Inward rectifier and delayed outward potassium currents in isolated guinea-pig ventricular myocytes: maturation and its role in repolarization.
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