Catalogo Articoli (Spogli Riviste)

OPAC HELP

Titolo:
Determination of reaction resistances for metal-hydride electrodes during anodic polarization
Autore:
Wang, CS; Soriaga, MP; Srinivasan, S;
Indirizzi:
Texas A&M Univ, Dept Chem, College Stn, TX 77843 USA Texas A&M Univ College Stn TX USA 77843 t Chem, College Stn, TX 77843 USA Princeton Univ, Ctr Energy & Environm Studies, Princeton, NJ 08544 USA Princeton Univ Princeton NJ USA 08544 nm Studies, Princeton, NJ 08544 USA
Titolo Testata:
JOURNAL OF POWER SOURCES
fascicolo: 2, volume: 85, anno: 2000,
pagine: 212 - 223
SICI:
0378-7753(200002)85:2<212:DORRFM>2.0.ZU;2-T
Fonte:
ISI
Lingua:
ENG
Soggetto:
HYDROGEN SURFACE CONCENTRATION; ELECTROCHEMICAL PROPERTIES; GALVANOSTATIC DISCHARGE; ALKALINE-SOLUTION; AC-IMPEDANCE; ALLOYS; BATTERIES; BEHAVIOR; PHASE;
Keywords:
metal-hydride electrodes; anodic polarization; hydrogen;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Engineering, Computing & Technology
Citazioni:
17
Recensione:
Indirizzi per estratti:
Indirizzo: Soriaga, MP Texas A&M Univ, Dept Chem, College Stn, TX 77843 USA Texas A&MUniv College Stn TX USA 77843 ege Stn, TX 77843 USA
Citazione:
C.S. Wang et al., "Determination of reaction resistances for metal-hydride electrodes during anodic polarization", J POWER SOU, 85(2), 2000, pp. 212-223

Abstract

The anodic polarization process in metal-hydride electrodes occurs via thefollowing consecutive steps: (i) diffusion of absorbed hydrogen from the bulk to the surface of the electrode, (ii) hydrogen transfer from absorbed state to adsorbed state at the electrode surface, and (iii) electrochemical oxidation of the adsorbed hydrogen on the electrode surface. A theoretical treatment is presented to account for the dependencies on these three consecutive steps, of the reaction resistances, anodic limiting current, cathodic limiting current, and exchange current. The theoretical analysis predictsthat the total resistances measured from linear micropolarization is the sum of the charge-transfer, hydrogen-transfer, and hydrogen-diffusion resistances, which is in contradiction with the generally accepted idea that the resistance measured from linear micropolarization is only the charge-transfer resistance. For a metal-hydride electrode with a flat pressure plateau at a low state of discharge (SOD), the resistance measured from linear micropolarization is approximately equal to the sum of three resistances measured from AC impedance, namely, charge-transfer, hydrogen-transfer and hydrogen-diffusion resistances; however, when the SOD is high, the resistance measured from linear micropolarization is higher than total resistances measured from AC impedance. (C) 2000 Elsevier Science S.A. All rights reserved.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 18/11/18 alle ore 05:14:31