Characterization of the physico-chemical properties of polymeric materials for aerospace flight

Author:: Khan, S. Z.
Published:: Sep 2, 1980.
Physical Description:: 1 electronic document
Additional Creators:: Rock, M.

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Summary:

Factors contributing to the final failure of Ni-Cd batteries are listed. A differential thermal analyzer was used to study several positive and negative battery electrodes. The negative plates show a very large peak (endotherm) between 245 C and 250C. The second endotherm occurs at 300C indicating the decomposition of Cd(OH)2. In positive plates, a first weak endotherm occurs at 100C, which indicates loss of H2O from Ni(OH)2(H2O)n molecules. A second large endotherm occurs in the range of 290C to 300C, indicating the decomposition of Ni(OH2) to NiO and H2O. Atomic absorption spectroscopy was used to determine nickel, cobalt, cadmium, and potassium content in battery electrolytes and electrodes. Results are presented in tables.

Other Subject(s):

NONMETALLIC MATERIALS

Collection:

NASA Technical Reports Server (NTRS) Collection.

Note:

Document ID: 19810022819.
Accession ID: 81N31362.
NASA-CR-160070.

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