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METAL HYDRIDE ALLOYS FOR ELECTROCHEMICAL ENERGY SOURCE APPLICATIONS

Published online by Cambridge University Press:  01 February 2011

Stoyan Todorov Bliznakov ,
Nikolay G Dimitrov ,
Tony Spassov  and
Alexander Popov
Stoyan Todorov Bliznakov
Affiliation:
sbliznak@binghamton.edu, SUNY at Binghamton, Chemistry, P.O. Box 6000, Binghamton, NY, 13902-6000, United States, 607 777 7949
Nikolay G Dimitrov
Affiliation:
dimitrov@binghamton.edu, SUNY at Binghamton, Chemistry, Binghamton, NY, 13902-6000, United States
Tony Spassov
Affiliation:
TSpassov@chem.uni-sofia.bg, Sofia University, Chemistry, Sofia, 1126, Bulgaria
Alexander Popov
Affiliation:
apopov@eagle.cu.bas.bg, Bulgarian Academy of Sciences, Sofia, 1000, Bulgaria
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Abstract

High-capacity conventional and advanced multicomponent metal hydride alloys were synthesized in this work by two different methods. A set of AB5–type intermetallic compounds, with different Al content, were produced by high-frequency vacuum induction melting method, while AB, A2B and mixed (AB5+Mg)-types composite nanocrystalline-amorphous alloys were obtained mechanochemically by high-energy ball milling in a planetary type mill. The alloys were characterized physically by XRD, SEM and thermodynamically by van't Hoff's plots derived from experimentally obtained PCT isotherms at various temperatures. Different optimized techniques for model electrode preparation from selected metal hydride alloys were also applied. The electrodes were charged-discharged electrochemically in concentrated alkaline solution. In this paper we compare the values for the electrochemical maximum capacity and cycle-life performance of the electrodes prepared by the investigated types of alloys.

Keywords

absorptionalloyhydrogenation
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1042: Symposium S – Materials and Technology for Hydrogen Storage , 2007 , 1042-S05-11
Copyright
Copyright © Materials Research Society 2008

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References

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