Self-discharge mechanism of nickel-hydrogen batteries using metal hydride anodes

Journal Article · Mon May 01 00:00:00 EDT 1989 · Journal of the Electrochemical Society; (USA)

DOI:https://doi.org/10.1149/1.2096920· OSTI ID:5194674

Iwakura, C; Kajiya, Y; Yoneyama, H ^[1]; Sakai, T; Oguro, K; Ishikawa, H ^[2]

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1. Dept. of Applied Chemistry, Osaka Univ., Suita, Osaka 565 (JP)
2. Government Industrial Research Institute, Osaka, Ikeda, Osaka 563 (JP)

The self-discharge mechanism of nickel-hydrogen batteries using metal hydride anodes is investigated and discussed by dividing the capacity loss during the storage in open-circuit conditions into two parts, i.e., reversible and irreversible ones. The reversible capacity loss is attributed to the desorption of hydrogen from the metal hydride anode and the irreversible capacity loss to the deterioration of the hydrogen-absorbing alloy. Microencapsulation of the alloy with a thin copper layer is found to improve the self-discharge characteristics.

• OSTI ID: 5194674
• Journal Information: Journal of the Electrochemical Society; (USA), Journal Name: Journal of the Electrochemical Society; (USA) Vol. 136:5; ISSN 0013-4651; ISSN JESOA
• Country of Publication: United States
• Language: English

Related Subjects

25 ENERGY STORAGE
250902* -- Energy Storage-- Batteries-- Performance & Testing
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400400 -- Electrochemistry
ANODES
COPPER
DESORPTION
ELECTRIC BATTERIES
ELECTROCHEMICAL CELLS
ELECTRODES
ELEMENTS
HYDRIDES
HYDROGEN
HYDROGEN COMPOUNDS
LAYERS
METAL-GAS BATTERIES
METALS
NICKEL-HYDROGEN BATTERIES
NONMETALS
PERFORMANCE TESTING
TESTING
TRANSITION ELEMENTS