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Title: Electrochemical determination of the diffusion coefficient of hydrogen through an LaNi{sub 4.25}Al{sub 0.75} electrode in alkaline aqueous solution

Abstract

Metal hydrides are being used as electrodes in nickel/metal-hydride batteries because of their ability to store large quantities of hydrogen and because of their many advantages over conventional lead-acid and nickel-cadmium batteries. The performance of a metal hydride electrode is determined by both the kinetics of the processes occurring at the metal/electrolyte interface and the rate of hydrogen diffusion within the bulk of the metal. The constant potential and constant current discharge techniques were used to determine the hydrogen diffusion coefficients in an LaNi{sub 4.25}Al{sub 0.75} electrode. The values obtained were 2.97 {times} 10{sup {minus}11} and 3.30 {times} 10{sup {minus}11} cm{sup 2}/s, respectively. The advantages and disadvantages of these two techniques are discussed.

Authors:
; ;  [1]
  1. Univ. of South Carolina, Columbia, SC (United States). Dept. of Chemical Engineering
Publication Date:
Sponsoring Org.:
USDOE
OSTI Identifier:
116464
Resource Type:
Journal Article
Journal Name:
Journal of the Electrochemical Society
Additional Journal Information:
Journal Volume: 142; Journal Issue: 8; Other Information: PBD: Aug 1995
Country of Publication:
United States
Language:
English
Subject:
25 ENERGY STORAGE; 08 HYDROGEN FUEL; NICKEL-HYDROGEN BATTERIES; ELECTRODES; HYDROGEN STORAGE; LANTHANUM BASE ALLOYS; PERMEABILITY; NICKEL ALLOYS; ALUMINIUM ALLOYS; HYDROGEN; DIFFUSION; MEASURING METHODS

Citation Formats

Zheng, G, Popov, B N, and White, R E. Electrochemical determination of the diffusion coefficient of hydrogen through an LaNi{sub 4.25}Al{sub 0.75} electrode in alkaline aqueous solution. United States: N. p., 1995. Web. doi:10.1149/1.2050076.
Zheng, G, Popov, B N, & White, R E. Electrochemical determination of the diffusion coefficient of hydrogen through an LaNi{sub 4.25}Al{sub 0.75} electrode in alkaline aqueous solution. United States. https://doi.org/10.1149/1.2050076
Zheng, G, Popov, B N, and White, R E. 1995. "Electrochemical determination of the diffusion coefficient of hydrogen through an LaNi{sub 4.25}Al{sub 0.75} electrode in alkaline aqueous solution". United States. https://doi.org/10.1149/1.2050076.
@article{osti_116464,
title = {Electrochemical determination of the diffusion coefficient of hydrogen through an LaNi{sub 4.25}Al{sub 0.75} electrode in alkaline aqueous solution},
author = {Zheng, G and Popov, B N and White, R E},
abstractNote = {Metal hydrides are being used as electrodes in nickel/metal-hydride batteries because of their ability to store large quantities of hydrogen and because of their many advantages over conventional lead-acid and nickel-cadmium batteries. The performance of a metal hydride electrode is determined by both the kinetics of the processes occurring at the metal/electrolyte interface and the rate of hydrogen diffusion within the bulk of the metal. The constant potential and constant current discharge techniques were used to determine the hydrogen diffusion coefficients in an LaNi{sub 4.25}Al{sub 0.75} electrode. The values obtained were 2.97 {times} 10{sup {minus}11} and 3.30 {times} 10{sup {minus}11} cm{sup 2}/s, respectively. The advantages and disadvantages of these two techniques are discussed.},
doi = {10.1149/1.2050076},
url = {https://www.osti.gov/biblio/116464}, journal = {Journal of the Electrochemical Society},
number = 8,
volume = 142,
place = {United States},
year = {Tue Aug 01 00:00:00 EDT 1995},
month = {Tue Aug 01 00:00:00 EDT 1995}
}