Electrical performance of spirally wound ion LiMn2O4 spinel cells

The lithium ion battery with manganese spinel cathode is attractive for an EV (electric vehicle) as well as consumer cells due to lower materials cost. A spirally wound 4/3 A size cell was developed to test materials for use in portable and EV batteries. The 4/3 A size is a convenient development vehicle since it is economical of materials but allows meaningful energy density, cycle life and stability estimates. Initial cells had high power capabilities with 85% capacity retention at 2 C, demonstrating the high power capability of the ion spinel system. Energy densities were 220 Wh/l and 84 Wh/kg for the complete cell. This significant improvement in battery characteristics due to the improved spinel material in an unoptimized cell now makes the ion spinel cell a promising candidate for both consumer and EV applications