Optimization of Lithium Titanate Electrodes for High-Power Cells

A full-cell mathematical model is used to compare the performance of graphite and lithium titanate negative electrodes, with a doped lithium manganese oxide positive electrode. The cell designs are optimized over electrode thickness and porosity, and several particle sizes are examined for the lithium titanate∕manganese oxide system. Although the graphite-based cell contains a higher specific energy than the titanate-based cell, the latter performs better at high rates when submicrometer particle sizes are used for both the positive and negative electrode. In light of this and several life-related advantages possessed by the electrode, it is recommended for development as a high-power energy storage system.