Hydroxide Ion Conductors as Possible Electrolytes in Intermediate Temperature Fuel Cells.
Abstract
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 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 Li5AiO4 have been studied previously. A large, sudden increase in the ionic conductivity of Li5AiO4 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.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jul 30, 1987
- Accession Number
- ADA185508
Entities
People
- Lie-yea Cheng
- Robert A. Huggins
- Steven Crouch-baker
Organizations
- Stanford University