A new MSNP‐LTO anode is developed to enable a high‐power battery system that provides three times more power than any existing battery system. It shows excellent cycle life and low‐temperature performance, and exhibits unmatched safety characteristics.

Batteries comprised of LiMn 2 O 4 cathodes (LMO) and Li 4 Ti 5 O 12 anodes (LTO) have potential advantages in terms of cost, safety, and power for transportation applications. In this manuscript, we present results from a cycle and calendar life study of 2 Ah LTO/LMO cells held at temperatures of 30 • C, 45 • C, and 60 • C for 5 months. The cells held at elevated temperatures had measurable loss of capacity and severe loss of power. The LTO anodes harvested from the cells were found to have developed a coating during testing comprised of manganese, phosphorous, and fluorine, which likely resulted in the decreased cycling and power performances. In addition, there was significant gas generation inside of the cells predominantly consisting of hydrogen. We report on the initial diagnostics of the power loss and gas generation for these LTO/LMO cells.

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