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NASA NTRS · 20205008043

Probing Model Sensitivity in Discharge Characteristics for a Li-O2 Battery using Uncertainty Quantification

Mohit Mehta·Geoffrey Bomarito·Patrick Leser·William Leser·James Warner·John Lawson
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Abstract

For this presentation, we looked into using uncertainty quantification to understand the uncertainty in model parameters in predicting voltage and time response of a lithium-air battery.

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Lithium-airModel UncertaintyUncertainty QuantificationBattery Modeling

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Mohit Mehta, Geoffrey Bomarito, Patrick Leser, William Leser, James Warner, John Lawson. Probing Model Sensitivity in Discharge Characteristics for a Li-O2 Battery using Uncertainty Quantification. https://ntrs.nasa.gov/citations/20205008043

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Battery Modeling subjectLithium-air subjectModel Uncertainty subjectUncertainty Quantification subject

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Lithium-air (Li-air) primary batteries have a theoretical specific capacity of 11,400 Wh/kg, the highest of any common metal-air system. NASA is developing Li-air technology for a Mobile Oxygen Concentrator for Spacecraft Emergencies, an application which requires an extremely lightweight primary battery that can discharge over 24 hours continuously. Several vendors were funded through the NASA SBIR program to develop Li-air technology to fulfill the requirements of this application. New catalysts and carbon cathode structures were developed to enhance the oxygen reduction reaction and increase surface area to improve cell performance. Techniques to stabilize the lithium metal anode surface were explored. Experimental results for prototype laboratory cells are given. Projections are made for the performance of hypothetical cells constructed from the materials that were developed.

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