Electrochemical studies on LaNi{sub 5{minus}x}Sn{sub x} metal hydride alloys

Journal Article · Thu Aug 01 04:00:00 EDT 1996 · Journal of the Electrochemical Society

DOI:https://doi.org/10.1149/1.1837050· OSTI ID:413410

Ratnakumar, B V ^[1]; Witham, C; Bowman, Jr, R C; Hightower, A; Fultz, B ^[2]

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1. Jet Propulsion Lab., Pasadena, CA (United States). Electrochemical Technologies Group
2. California Inst. of Technology, Pasadena, CA (United States). Div. of Engineering and Applied Science

Electrochemical studies were performed on LaNi{sub 5{minus}x}Sn{sub x} with 0 {le} x {le} 0.5. The authors measured the effect of the Sn substituent on the kinetics of charge-transfer and diffusion during hydrogen absorption and desorption, and the cyclic lifetimes of LaNi{sub 5{minus}x}Sn{sub x} electrodes in 250 mAh laboratory test cells. They report beneficial effects of making small substitutions of Sn for Ni in LaNi{sub 5} on the performance of the metal hydride alloy anode in terms of cyclic lifetime, capacity, and kinetics. The optimal concentration of Sn in LaNi{sub 5{minus}x}Sn{sub x} alloys for negative electrodes in alkaline rechargeable secondary cells was found to lie in the range 0.25 {le} x {le} 0.3.

• Sponsoring Organization: USDOE
• DOE Contract Number: FG03-94ER14493
• OSTI ID: 413410
• Journal Information: Journal of the Electrochemical Society, Journal Name: Journal of the Electrochemical Society Journal Issue: 8 Vol. 143; ISSN 0013-4651; ISSN JESOAN
• Country of Publication: United States
• Language: English

Related Subjects

25 ENERGY STORAGE
36 MATERIALS SCIENCE
40 CHEMISTRY
ADSORPTION
ANODES
DESORPTION
ELECTROCHEMISTRY
HYDROGEN
HYDROGEN STORAGE
LANTHANUM ALLOYS
METAL-GAS BATTERIES
NICKEL BASE ALLOYS
SORPTIVE PROPERTIES
TIN ADDITIONS