Title :
Performance of LaNi4.7Sn0.3 metal hydride electrodes in sealed cells
Author :
Hightower, A. ; Witham, C.K. ; Bowman, R.C., Jr. ; Ratnakumar, B.V. ; Fultz, B. ; Czajkowski, B. ; Zhang, L. ; Singh, D. ; Klein, M. ; Huston, L.
Author_Institution :
California Inst. of Technol., Pasadena, CA, USA
Abstract :
Cycle life and kinetics studies were performed on sealed nickel metal hydride electrochemical cells with anodes of LaNi4.7Sn 0.3 and of a standard mischmetal alloy. The modest increase in cell capacity of the LaNi4.7Sn0.3 alloy at higher rates of discharge suggests improved kinetics. AC impedance studies as a function of cycle life indicate the onset of cell failure. Self-discharge rates in sealed cells correlate with alloy plateau pressures measured by gas phase isotherms and internal cell pressures. Cycle life of the LaNi4.7Sn0.3 was inferior to cells of standard mischmetal formulation Mm(NiAlCoMn)5
Keywords :
electrochemical electrodes; electrochemistry; lanthanum alloys; nickel alloys; secondary cells; tin alloys; AC impedance; LaNi4.7Sn0.3; LaNi4.7Sn0.3 metal hydride electrodes; cycle life; discharge rate; gas phase isotherms; internal cell pressures; kinetics studies; sealed secondary cells; self-discharge rates; Aluminum alloys; Anodes; Batteries; Costs; Electrodes; Kinetic theory; Laboratories; Metals industry; Nickel alloys; Tin;
Conference_Titel :
Battery Conference on Applications and Advances, 1998., The Thirteenth Annual
Conference_Location :
Long Beach, CA
Print_ISBN :
0-7803-4098-1
DOI :
10.1109/BCAA.1998.653902
