Mathematical modeling of LiAl/LiCl,KCl/FeS cells

Journal Article · Thu Dec 01 04:00:00 EST 1988 · J. Electrochem. Soc.; (United States)

DOI:https://doi.org/10.1149/1.2095464· OSTI ID:6240971

Bernardi, D; Powlikowski, E M; Newman, J

The thermodynamic equilibrium behavior and the nonequilibrium behavior of high temperature LiAl/LiCl,KCl/FeS cells are examined. A consistent set of thermodynamic data for the open-circuit cell potential, and its dependence on temperature, initial electrolyte composition, and FeS utilization are presented. The possible reaction sequences of the FeS electrode are examined. A nonequilibrium computer model of the cell is discussed, and results are focused on the case with LiK/sub 6/Fe/sub 24/S/sub 26/Cl as the intermediate discharge product of the FeS electrode. The model is used to predict cell potential and electrolyte composition changes throughout the cell as a function of state of discharge. The model predicts that the clogging of pores by KCl precipitation can limit the utilization of the FeS electrode during discharge. Such clogging appears to occur, however to a lesser extent, in experimental cells. If expansion of the FeS electrode during discharge is taken into consideration, the predicted utilization approaches that of experimental cells.

• Research Organization: General Motors Research Labs., Physical Chemistry Dept., Warren, MI (US); Air Force Technical Application Center, Patrick Air Force Base, FL (US); Materials and Chemical Sciences Div., Lawrence Berkeley Lab. and Dept. of Chemical Engineering, Univ. of California, Berkeley, CA (US)
• OSTI ID: 6240971
• Journal Information: J. Electrochem. Soc.; (United States), Journal Name: J. Electrochem. Soc.; (United States) Vol. 135:12; ISSN JESOA
• Country of Publication: United States
• Language: English

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