Studies on electroless cobalt coatings for microencapsulation of hydrogen storage alloys

Journal Article · Tue Sep 01 04:00:00 EDT 1998 · Journal of the Electrochemical Society

DOI:https://doi.org/10.1149/1.1838754· OSTI ID:659114

Haran, B S; Popov, B N; White, R E ^[1]

---

1. Univ. of South Carolina, Columbia, SC (United States). Dept. of Chemical Engineering

LaNi{sub 4.27}Sn{sub 0.24}alloy was microencapsulated with cobalt by electroless deposition from an alkaline hypophosphite bath. Discharge curves of the encapsulated alloy indicate an additional contribution to the capacity arising from the cobalt on the surface. Studies on cobalt thin films reveal the presence of adsorbed hydrogen in cobalt. The amount of hydrogen adsorbed was observed to increase with time of cathodic polarization and to reach a maximum. Polarization techniques have been used to characterize the cobalt-plated alloy as a function of state of charge. The equilibrium potential of the microencapsulated electrode at low hydrogen concentration is determined by the potential of the cobalt coating on the surface.

• Sponsoring Organization: USDOE, Washington, DC (United States)
• OSTI ID: 659114
• Journal Information: Journal of the Electrochemical Society, Journal Name: Journal of the Electrochemical Society Journal Issue: 9 Vol. 145; ISSN 0013-4651; ISSN JESOAN
• Country of Publication: United States
• Language: English

Related Subjects

08 HYDROGEN
25 ENERGY STORAGE
36 MATERIALS SCIENCE
COBALT
ELECTROPLATING
ENCAPSULATION
HYDROGEN STORAGE
LANTHANUM ALLOYS
NICKEL ALLOYS
NICKEL-HYDROGEN BATTERIES
TIN ALLOYS