Hydroxide-ion conductors as possible electrolytes in intermediate-temperature fuel cells. Technical report

Technical Report · Thu Jul 30 00:00:00 EDT 1987

OSTI ID:5715243

Cheng, L Y; Crouch-Baker, S; Huggins, R A

Prior work has shown that materials in the lithium aluminum hydroxide system can be used as hydroxide ion-conducting electrolytes at intermediate temperatures. It has been proposed that such materials may be of use as electrolytes for the electric decomposition of water. In this work, preliminary results concerning the use of materials in this system as possible fuel-cell electrolytes at intermediate temperatures will be presented. The AC ionic conductivity and thermal behavior of a material of nominal composition Li/sub 5/AlO/sub 4/ have been studied previously. A large, sudden increase in the ionic conductivity of Li/sub 5/AlO/sub 4/ in a wet environment at approximately 450 C was observed. Such behavior was not observed in a dry environment. Pure LiOH was found to exhibit similar behavior, and it was suggested that the observed conductivity increase in a wet environment is due to the formation of LiOH. In this work, preliminary results concerning the use of compositions within the Li - A1 - H system as possible fuel cell electrolytes at intermediate temperatures will be presented.

• Research Organization: Stanford Univ., CA (USA). Dept. of Materials Science and Engineering
• OSTI ID: 5715243
• Report Number(s): AD-A-185508/9/XAB; TR-5
• Country of Publication: United States
• Language: English

Related Subjects

30 DIRECT ENERGY CONVERSION
300503* -- Fuel Cells-- Materials
Components
& Auxiliaries
ALKALI METALS
ALTERNATING CURRENT
ALUMINIUM
CHARGED PARTICLES
CHEMICAL REACTIONS
CURRENTS
DECOMPOSITION
DIRECT ENERGY CONVERTERS
ELECTRIC CONDUCTIVITY
ELECTRIC CONDUCTORS
ELECTRIC CURRENTS
ELECTRICAL PROPERTIES
ELECTROCHEMICAL CELLS
ELECTROLYTES
ELEMENTS
FUEL CELLS
HYDROGEN COMPOUNDS
HYDROXIDES
IONIC CONDUCTIVITY
IONS
LITHIUM
METALS
MOISTURE
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
WATER