Novel, Redox Stabilized Li-Ion Rechargeable Cell

76126-Current commercial Li-ion cells, used in electric and hybrid electric vehicles, are protected by several layers of safety devices, primarily to prevent catastrophic thermal runaway events that may result from improper use. Unfortunately, these safety devices are difficult to scale up for large cells, are not very effective at stabilizing multi-cell packs, and are generally not reversible once activated. This project will develop a Li-ion cell that incorporates an internal, low cost, voltage activated, reversible safety mechanism that can handle the high currents required to stabilize large cells. The development and initial optimization of the components of the cell safety mechanism will be completed in Phase I. The mechanism will be incorporated into full Li-ion cells for further evaluation and to demonstrate feasibility. Commercial Applications and Other Benefits as described by the awardee: The proprietary safety technology should lead to the production of a large product line of safe, low cost, Li-ion battery cells and systems. Applications include electric and hybrid electric vehicles (including automobiles, scooters, and bikes), satellites, stationary backup power, and portable power applications (such as cell phones, computers, and PDAs) for both civilian and military use.