Abstract
The thermal behavior of lithium/sulfur (Li/S) cells was studied using isothermal micro-calorimetry (IMC) in terms of reversible and irreversible heat generation. The heat generation profile was compared with the voltage profile during cell discharge. The heat generation rate correlated very well with the evolution in reaction voltage, demonstrating that IMC is a useful tool to study elementary reactions in a Li/S cell. A simple heat generation model yielded reasonable agreement with the measured heat release and provided a comprehensive picture of the elementary reaction steps in a Li/S cell.
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